CN105886956B - A kind of economizing type two-phase stainless steel sheet and preparation method thereof - Google Patents
A kind of economizing type two-phase stainless steel sheet and preparation method thereof Download PDFInfo
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- CN105886956B CN105886956B CN201610505186.5A CN201610505186A CN105886956B CN 105886956 B CN105886956 B CN 105886956B CN 201610505186 A CN201610505186 A CN 201610505186A CN 105886956 B CN105886956 B CN 105886956B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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Abstract
A kind of economizing type two-phase stainless steel sheet and preparation method thereof, the composition of the stainless sheet steel is according to mass percent：C 0.08~0.13%；Cr 20~23%；Mn 4~6%；Ni 0.5~1.5%；Mo 0.2~0.5%；N 0.1~0.25%；Surplus is iron and other inevitable impurity.Preparation method is：First raw material is matched according to the composition and be smelted into molten steel；Molten steel is cast into ingot casting again；By hot rolling cogging and figuring of surface behind ingot casting excision rising head part；Then hot rolling obtains the thick hot rolled plates of 3 ~ 6mm；Hot rolled plate is annealed, cold rolling acquisition 1 ~ 1.5mm thin thick plates after pickling；Last solution annealing obtains economizing type two-phase stainless steel sheet.The present invention can improve the intensity and plasticity of stainless sheet steel, it is possible to eliminate hot-rolling edge cracking, be greatly improved hot rolled plate quality and lumber recovery by rational Alloying Design.
Description
Technical field
The present invention relates to technical field of steel rolling, and in particular to a kind of economizing type two-phase stainless steel sheet and preparation method thereof.
Background technology
Two phase stainless steel is made up of ferrite and austenite phase, and two-phase proportion is close to 1:1, have austenitic stainless steel and iron concurrently
The good characteristic of ferritic stainless steel.Current research center of gravity is Devoting Major Efforts To Developing economizing type two phase stainless steel, to substitute 304 even
The austenitic stainless steels such as 316L, reach the purpose for economizing on resources and reducing cost.
LDX2101 type two-phase stainless steel sheet turns into study hotspot, compared with traditional two phase stainless steel, the saving in recent years
Type two phase stainless steel uses the Alloying Design with " Mn+N " replacement " Ni " to greatly reduce production cost.But, due to
The two phase stainless steel N content is higher, and gas hole defect is easily produced when being cast into ingot casting, influences lumber recovery, causes the pole of resource
It is big to waste.Meanwhile, high temperature austenite and the difference of alloying elements distribution in high temperature ferrite cause high temperature hardness to differ greatly, heat
Compatibility of deformation is poor in deformation process, is easily ftractureed in course of hot rolling, and lumber recovery is seriously reduced, and hinders industrialized production.
The content of the invention
The problem of existing for existing LDX2101 types two-phase stainless steel sheet, the present invention provides a kind of economizing type two-phase not
Become rusty steel sheet and preparation method thereof, by rational composition design, and control hot rolling, cold rolling and solution annealing technique, obtains 1
Surface quality thick ~ 1.5mm is good, the boundless two-phase stainless steel sheet split, and the two-phase stainless steel sheet has suitable Austria
Family name's body content and excellent stabilization of austenite, and due to thin plate in plastic history have TRIP effects, intensity and
Plasticity is greatly promoted.The technical scheme is that：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C 0.08~0.13%；Cr 20~
23%；Mn 4~6%；Ni 0.5~1.5%；Mo 0.2~0.5%；N 0.1~0.25%；Surplus is iron and other inevitable impurity.
The economizing type two-phase stainless steel sheet has a TRIP effects, and thickness is 1 ~ 1.5mm, and austenite content is 35 ~
55%, tensile break strength during room temperature is 850 ~ 1000MPa, and yield strength is 500 ~ 600MPa, elongation after fracture is 40 ~
65%, spot corrosion equivalent（PREN values）For 24 ~ 28, strength and ductility product is 40 ~ 54GPa%, and surface quality is good, boundless to split.
The preparation method of the economizing type two-phase stainless steel sheet, is carried out according to following processing step：
（1）According to C 0.08 ~ 0.13%, Cr 20 ~ 23%, Mn 4 ~ 6%, Ni 0.5 ~ 1.5%, Mo 0.2 ~ 0.5%, N 0.1 ~
0.25%th, surplus is iron and chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, the T10 of other inevitable impurity
Carbon steel and Fe (CrN) alloy, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, electrolytic manganese and Fe are added after fusing
(CrN) alloy melting, obtains molten steel；
（2）Molten steel is cast in mold, it is 1460 ~ 1530 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 3 ~ 5 passage hot rolling coggings, cogging temperature is 1200 DEG C, and cogging drafts is
50 ~ 70mm, then figuring of surface；
（4）By after figuring of surface strand carry out hot rolling, start rolling temperature be 1150 ~ 1250 DEG C, finishing temperature be 960 ~
1050 DEG C, hot rolling total reduction is 90 ~ 95%, through 7 ~ 9 passes, and percentage pass reduction is 20 ~ 35%, and water cooling is cold after the completion of rolling
But, the thick hot rolled plates of 3 ~ 6mm are obtained；
（5）Hot rolled plate is annealed 20min at 1000 ~ 1100 DEG C, it is cold rolling after pickling, control cold rolling reduction ratio 65 ~
75%, obtain 1 ~ 1.5mm thin thick plates；
（6）By flat cold-rolled sheet through 900 ~ 1150 DEG C of 200 ~ 500s of solution annealing, economizing type two phase stainless steel is obtained after quenching
Thin plate.
Beneficial effects of the present invention：
1. the present invention can obtain appropriate metastable austenite, and regulate and control austenite phase by rational Alloying Design
Stability；And the TRIP effects for making it that " γ → ε-martensite → α '-martensite " transformation occur in deformation process, so that
Improve intensity and plasticity, in addition, the economizing type two phase stainless steel thermoplasticity of the present invention is greatly improved, hot rolling side can be eliminated
Split, hot rolled plate quality and lumber recovery are greatly improved.
2. the present invention makes carbon content of a relatively high in composition design, it is smelted into except simplifying decarbonization process, reduction part
This is outer, and part of nickel and nitrogen are replaced with carbon, and melting is substantially reduced while cost of material is reduced with there is stomata in casting cycle
The possibility of defect, improves strand qualification rate, and reduction prepares difficulty.
3. the economizing type two-phase stainless steel sheet of the present invention is suitable with LDX2101 PREN values, its corrosion resistance is effectively ensured
Can, and its strong plasticity is better than LDX2101；Corrosion resistance and forming property are all better than 304 austenitic stainless steels, and alloy content is also
Reduction, it is possible to achieve substitute the purpose of 304 austenitic stainless steels.
4. the preparation method of the economizing type two-phase stainless steel sheet of the present invention is by controlling hot rolling, cold rolling and solution annealing work
Skill, so that the surface quality for obtaining 1 ~ 1.5mm thickness is good, the boundless two-phase stainless steel sheet split, is further ensured that its performance is joined
Number.
Brief description of the drawings
Fig. 1 is the edge and the photomacrograph on surface that its hot rolled plate during LDX2101 is prepared using conventional method；
The method that conventional method prepares LDX2101 is：（1）It is according to alloying component：C 0.015~0.03%、Mn 4.5~
5.5%th, Cr 21.0 ~ 22.0, Ni 1.5 ~ 1.7%, Mo 0.1 ~ 0.3%, Cu 0.15 ~ 0.35, N 0.20 ~ 0.24, surplus be iron and
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, copper and Fe (CrN) alloy of other inevitable impurity, first melt
Refining electrolysis chromium, pure iron, molybdenum, nickel and copper etc., add electrolytic manganese and Fe (CrN) alloy melting, obtain molten steel after fusing（Due to work
Require that carbon content is extremely low in steel in industry, therefore also need strictly to control decarbonization process, cost can be increased in actual production）；（2）
Casting；（3）Cogging；（4）Hot rolling：Casting billet surface is subjected to reconditioning, in 1200 ~ 1250 DEG C of open rollings, rolling pass is 9 ~ 13 passages,
Percentage pass reduction is less than 20%, and finishing temperature is 900 ~ 1000 DEG C, using air cooling or conventional section cooling, cooling velocity after finish to gauge
It is relatively slow, easily cause brittlement phase to separate out；（5）Measure on edge crack of hot rolled plate part is removed, and through 1000 ~ 1100 DEG C of 15 ~ 30min of annealing,
It is cold rolling after pickling；（6）Solution treatment：Cold-reduced sheet obtains production board through 1000 ~ 1150 DEG C of 200 ~ 500s of solution treatment.
The yield strength of LDX2101 sheet materials be 500 ~ 550MPa, 750 ~ 800MPa of tensile strength, elongation percentage 30 ~ 40%, strength and ductility product be 23 ~
32GPa%, PREN value are 24 ~ 27.
Fig. 2 is that the embodiment of the present invention 1 prepares the edge of hot rolled plate and surface during economizing type two-phase stainless steel sheet
Photomacrograph；
Fig. 3 is engineering stress-strain curve of economizing type two-phase stainless steel sheet prepared by the embodiment of the present invention 1；
Fig. 4 is the polarization curve of economizing type two-phase stainless steel sheet prepared by the embodiment of the present invention 1.
Embodiment
Embodiment 1：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.11%；Cr=21.3%；Mn=
4.6%；Ni=1.1%；Mo=0.4%；N=0.16%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and its according to C=0.11%, Cr=21.3%, Mn=4.6%, Ni=1.1%, Mo=0.4%, N=0.16%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and the Fe (CrN) of his inevitable impurity are closed
Gold, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, adds electrolytic manganese and Fe (CrN) alloy melting, obtains after fusing
To molten steel；
（2）Molten steel is cast in mold, it is 1500 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
60mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1030 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 4mm
The photomacrograph on rolling sheets, its edge and surface is as shown in Figure 2；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 75%
Thin thick plate；
（6）By flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet is obtained after quenching.
Fig. 1, which is provided, to be prepared the edge of its hot rolled plate and the macroscopic view on surface during LDX2101 using conventional method and shines
Piece, shows serious side and splits phenomenon, and hot rolled plate surface quality manufactured in the present embodiment is good, boundless to split phenomenon, such as Fig. 2
It is shown.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 45%, room
Tensile break strength 860MPa when warm, yield strength 530MPa, elongation after fracture 63%, spot corrosion equivalent（PREN values）For 25.2, by force
Modeling product reaches 54GPa%, and surface quality is good, boundless to split, its mechanical curves as shown in figure 3, polarization curve as shown in figure 4,
Pitting potential illustrates its corrosion resistance and 304 stainless steels in 330mv or so（Pitting potential 300mV or so）Quite.
Embodiment 2：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.08%；Cr=20.1%；Mn=
4.2%；Ni=0.9%；Mo=0.5%；N=0.18%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and its according to C=0.08%, Cr=20.1%, Mn=4.2%, Ni=0.9%, Mo=0.5%, N=0.18%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and the Fe (CrN) of his inevitable impurity are closed
Gold, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, adds electrolytic manganese and Fe (CrN) alloy melting, obtains after fusing
To molten steel；
（2）Molten steel is cast in mold, it is 1480 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
60mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1050 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 4mm
Rolling sheets；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 75%
Thin thick plate；
（6）By flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 46%, room
Tensile break strength 900MPa when warm, yield strength 500MPa, elongation after fracture 58%, spot corrosion equivalent（PREN values）For 24.6, by force
Modeling product reaches 52GPa%, and surface quality is good, boundless to split.
Embodiment 3：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.13%；Cr=22.8%；Mn=
5.7%；Ni=0.5%；Mo=0.4%；N=0.22%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and its according to C=0.13%, Cr=22.8%, Mn=5.7%, Ni=0.5%, Mo=0.4%, N=0.22%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and the Fe (CrN) of his inevitable impurity are closed
Gold, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, adds electrolytic manganese and Fe (CrN) alloy melting, obtains after fusing
To molten steel；
（2）Molten steel is cast in mold, it is 1530 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 3 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
60mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1250 DEG C, and finishing temperature is 1040 DEG C, hot rolling
Total reduction is 95%, through 9 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 3mm
Rolling sheets；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 65%
Thin thick plate；
（6）By flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 55%, room
Tensile break strength 940MPa when warm, yield strength 580MPa, elongation after fracture 48%, strength and ductility product reach 45GPa%, spot corrosion equivalent
（PREN values）For 27.6, surface quality is good, boundless to split.
Embodiment 4：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.08%；Cr=21.2%；Mn=
4.8%；Ni=1.5%；Mo=0.2%；N=0.25%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and its according to C=0.08%, Cr=21.2%, Mn=4.8%, Ni=1.5%, Mo=0.2%, N=0.25%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and the Fe (CrN) of his inevitable impurity are closed
Gold, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, adds electrolytic manganese and Fe (CrN) alloy melting, obtains after fusing
To molten steel；
（2）Molten steel is cast in mold, it is 1460 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
60mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1060 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 5mm
Rolling sheets；
（5）By hot rolled plate in 1000 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control is obtained 70%
1.5mm thin thick plate；
（6）By flat cold-rolled sheet through 1100 DEG C of solution annealing 200s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has a TRIP effects, and thickness is 1.5mm, austenite content 44%,
Tensile break strength 900MPa during room temperature, yield strength 520MPa, elongation after fracture 49%, strength and ductility product reach 44GPa%, and spot corrosion is worked as
Amount（PREN values）For 25.9, surface quality is good, boundless to split.
Embodiment 5：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.10%；Cr=20.5%；Mn=
4.3%；Ni=0.8%；Mo=0.5%；N=0.2%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and other according to C=0.10%, Cr=20.5%, Mn=4.3%, Ni=0.8%, Mo=0.5%, N=0.2%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy of inevitable impurity,
First melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting, obtain steel after fusing
Water；
（2）Molten steel is cast in mold, it is 1500 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
70mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1050 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 6mm
Rolling sheets；
（5）By hot rolled plate in 1100 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control is obtained 75%
1.5mm thin thick plate；
（6）By flat cold-rolled sheet through 900 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has a TRIP effects, and thickness is 1.5mm, austenite content 53%,
Tensile break strength 950MPa during room temperature, yield strength 500MPa, elongation after fracture 48%, strength and ductility product reach 46GPa%, and spot corrosion is worked as
Amount（PREN values）For 25.4, surface quality is good, boundless to split.
Embodiment 6：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.08%；Cr=20%；Mn=6%；
Ni=0.6%；Mo=0.2%；N=0.25%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）According to C=0.08%, Cr=20%, Mn=6%, Ni=0.6%, Mo=0.2%, N=0.25%, surplus be iron and other not
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy of evitable impurity, first
Melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting, obtain steel after fusing
Water；
（2）Molten steel is cast in mold, it is 1500 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
50mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1000 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 4mm
Rolling sheets；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 75%
Thin thick plate；
（6）By flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 48%, room
Tensile break strength 980MPa when warm, yield strength 520MPa, elongation after fracture 55%, strength and ductility product reach 54GPa%, spot corrosion equivalent
（PREN values）For 24.7, surface quality is good, boundless to split.
Embodiment 7：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.11%；Cr=21.3%；Mn=
4.6%；Ni=1.1%；Mo=0.4%；N=0.16%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）It is iron and its according to C=0.11%, Cr=21.3%, Mn=4.6%, Ni=1.1%, Mo=0.4%, N=0.16%, surplus
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and the Fe (CrN) of his inevitable impurity are closed
Gold, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, adds electrolytic manganese and Fe (CrN) alloy melting, obtains after fusing
To molten steel；
（2）Molten steel is cast in mold, it is 1520 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
70mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1030 DEG C, hot rolling
Total reduction is 90%, through 7 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 4mm
Rolling sheets；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 75%
Thin thick plate；
（6）By flat cold-rolled sheet through 1000 DEG C of solution annealing 400s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 48%, room
Tensile break strength 925MPa when warm, yield strength 560MPa, elongation after fracture 45%, strength and ductility product reach 42GPa%, spot corrosion equivalent
（PREN values）For 25.2, surface quality is good, boundless to split.
Embodiment 8：
A kind of economizing type two-phase stainless steel sheet, its composition is according to mass percent：C=0.08%；Cr=20%；Mn=6%；
Ni=0.6%；Mo=0.2%；N=0.25%；Surplus is iron and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, is concretely comprised the following steps：
（1）According to C=0.08%, Cr=20%, Mn=6%, Ni=0.6%, Mo=0.2%, N=0.25%, surplus be iron and other not
Chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy of evitable impurity, first
Melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting, obtain steel after fusing
Water；
（2）Molten steel is cast in mold, it is 1500 DEG C to control cast temperature；
（3）By ingot casting excision rising head part, through 5 passage hot rolling coggings, 1200 DEG C of cogging temperature, cogging drafts is
70mm, then figuring of surface；
（4）Strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1000 DEG C, hot rolling
Total reduction is 90%, through 9 passes, and percentage pass reduction is 20 ~ 35%, cooling by water after the completion of rolling, obtains the thick heat of 4mm
Rolling sheets；
（5）By hot rolled plate in 1050 DEG C of annealing 20min, cold rolling after pickling, the cold rolling reduction ratio of control obtains 1mm 75%
Thin thick plate；
（6）By flat cold-rolled sheet through 950 DEG C of solution annealing 500s, economizing type two-phase stainless steel sheet is obtained after quenching.
Economizing type two phase stainless steel manufactured in the present embodiment has TRIP effects, and thickness is 1mm, austenite content 50%, room
Tensile break strength 1000MPa when warm, yield strength 560MPa, elongation after fracture 46%, strength and ductility product reach 46GPa%, and spot corrosion is worked as
Amount（PREN values）For 24.7, surface quality is good, boundless to split.
Claims (2)
1. a kind of economizing type two-phase stainless steel sheet, it is characterised in that the composition of the economizing type two-phase stainless steel sheet is according to matter
Measuring percentage is：C 0.08~0.13%；Cr 20~23%；Mn 4~6%；Ni 0.5~1.5%；Mo 0.2~0.5%；N
0.1~0.25%；Surplus is iron and other inevitable impurity；The economizing type two-phase stainless steel sheet has TRIP effects
Should, thickness is 1~1.5mm, and austenite content is 35~55%, and tensile break strength during room temperature is 850~1000MPa, is bent
Intensity is taken for 500~600MPa, elongation after fracture is 40~65%, and spot corrosion equivalent (PREN values) is 24~28, and strength and ductility product is 40
~54GPa%, surface quality is good, boundless to split.
2. the preparation method of a kind of economizing type two-phase stainless steel sheet described in claim 1, it is characterised in that according to following work
Skill step is carried out：
(1) according to C 0.08~0.13%, Cr 20~23%, Mn 4~6%, Ni 0.5~1.5%, Mo 0.2~0.5%, N
0.1~0.25%, surplus be the chemical composition apolegamy electrolysis chromium of iron and other inevitable impurity, electrolytic manganese, pure iron, molybdenum,
Nickel, T10 carbon steel and Fe (CrN) alloy, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolysis after fusing
Manganese and Fe (CrN) alloy melting, obtain molten steel；
(2) molten steel is cast in mold, it is 1460~1530 DEG C to control cast temperature；
(3) ingot casting is cut off into rising head part, through 3~5 passage hot rolling coggings, cogging temperature is 1200 DEG C, and cogging drafts is 50
~70mm, then figuring of surface；
(4) strand after figuring of surface is subjected to hot rolling, start rolling temperature is 1150~1250 DEG C, and finishing temperature is 960~1050
DEG C, hot rolling total reduction is 90~95%, through 7~9 passes, and percentage pass reduction is 20~35%, water cooling after the completion of rolling
Cooling, obtains the thick hot rolled plates of 3~6mm；
(5) hot rolled plate is annealed 20min at 1000~1100 DEG C, it is cold rolling after pickling, cold rolling reduction ratio is controlled 65~75%,
Obtain 1~1.5mm thin thick plates；
(6) flat cold-rolled sheet is obtained into economizing type two phase stainless steel thin through 900~1150 DEG C of 200~500s of solution annealing after quenching
Plate.
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