CN105925889A - Ultrathick specification 1.2311 mold steel plate and preparation method thereof - Google Patents
Ultrathick specification 1.2311 mold steel plate and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- 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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- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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Abstract
The invention relates to a ultrathick specification 1.2311 mold steel plate. The steel plate uses Fe as a basic element, and comprises the following components in percentage by mass: 0.35-0.45% of C, 0.20-0.40% of Si, 1.30-1.60% of Mn, P not more than 0.020%, S not more than 0.010%, 1.80-2.00% of Cr, 0.15-0.25% of Mo, 0.01-0.05% of Al, Ni not more than 0.30%, Cu not more than 0.25%, 0.001-0.002% of B, and the balance of inevitable impurity elements; and the carbon equivalent is 0.98-1.1. A preparation method of the steel plate comprises such procedures as blank smelting, continuous casting of a circular blank, heating, descaling of high-pressure water, rolling, straightening, slow cooling, flaw detection and tempering. The prepared 1.2311 mold steel plate can reach a thickness of 160-250 mm, an average surface hardnes of 30-36 HRC and a core hardness of not less than 28 HRC; the flaw detection of a finished product is performed by NB/T 47013.3 standard ultrasonic waves; and the quality grade reaches above II grade.
Description
Technical field
The present invention relates to a kind of special think gauge 1.2311 mould steel plate and manufacture method thereof, particularly relate to a kind of method that continuous casting round bloom using diameter 1000mm manufactures this mould steel plate.
Background technology
Die steel is the important materials in mould processing manufacturing industry, and it directly affects mould processing, die quality and product quality.Wherein 1.2311 steel of Germany are as the typical steel grade of die steel, mould processing manufacturing industry obtain develop considerablely and applied widely, 1.2311 steel are the middle carbon alloy plastic die steels of a kind of pre-hardening type, it is applied to mould of plastics manufacture field in large quantities, the steel such as the similar P20 having the U.S., the 3Cr2Mo of China.This kind of steel is carried out modifier treatment in advance by steel mill, with the serviceability required by acquisition, then carries out die sinking processing, after mould molding, it is not necessary to carry out finished heat treatment again and just can directly use.This kind of mould steel can avoid die deformation and the crack problem caused due to heat treatment, and optimum makes complex-shaped large and medium-sized precise plastic mould.At present, plastic die steel is generally individually used forging hammer or press to produce by domestic production factory, seldom uses rolling mill practice to produce, though use rolling mill practice to produce also because face crack or internal flaw detection is defective or qualification rate is low and can not high-volume large-scale production.The most make great efforts probe into and expand manufacture method both at home and abroad, with obtain have relatively low smelting cost, alloying the most reasonably, there are 1.2311 steel of optimal organizational structure and excellent comprehensive performance.The existing production technology of mould steel mainly has following 3 kinds at present:
(1) electric furnace (converter) → external refining → mold → forge → roll → heat treatment, is the most traditional a kind of mode.Since the eighties, most domestic special steel plant is all adopted in this way, and it is the most traditional a kind of technology pattern.
(2) electric furnace → external refining → continuous casting steel billet → rolling → heat treatment, this production technology uses and makes energy consumption reduction more to roll for forging process, produce recovery rate also to increase simultaneously, owing to continuous casting plate slab thickness limits, little thickness specification mould steel can only be produced.
(3) electric furnace → external refining → molding → electroslag remelting → forge → roll → heat treatment, degree of purity requirement is higher, consistency, combination property uniform and segregation degree preferable purposes material typically to producing for such technique, and it is also to generally acknowledge the most in the world to produce the high-quality 1.2311 widest technological process of die steel.
But, all there is more shortcoming in above-mentioned production technology: first, produces steel ingot by die casting process, and the lumber recovery of 1.2311 die steels is by a definite limitation；Second, produce 1.2311 die steels by forging mode, although can effectively improve inside steel billet tissue, but the production efficiency of forging mode is relatively low, and the dimensional accuracy of finished product die steel is the highest；3rd, the steel billet that electroslag remelting steel ingot produces also is only applicable to the less high-end purposes product of demand, and it cannot meet the manufacturing of the most civilian 1.2311 die steels owing to production cost is higher.
Summary of the invention
The technical problem to be solved is a kind of method providing continuous casting round bloom to produce special thick 1.2311 die steels for above-mentioned prior art.The method employing continuous cast round billets casting+to roll for forging process, manufactured special think gauge 1.2311 die steel is not on the premise of using die casting process, both ensure that every comprehensive mechanical property of 1.2311 die steels, improve again the lumber recovery of 1.2311 die steels and internal flaw detection qualification rate, reduce production cost and improve production efficiency.
The present invention solves the technical scheme that the problems referred to above are used: a kind of special think gauge 1.2311 mould steel plate, the thickness of described steel plate is 160～250mm, steel plate element and comprise the chemical composition of following mass percent based on Fe: C:0.35～0.45%, Si:0.20～0.40%, Mn:1.30～1.60%, P :≤0.020%, S :≤0.010%, Cr:1.80～2.00%, Mo:0.15～0.25%, Al:0.01～0.05%, Ni :≤0.30%, Cu :≤0.25%, B:0.001～0.002% and inevitable impurity element；Carbon equivalent 0.98～1.2.
The average surface hardness 30～36HRC of above-mentioned steel plate, core hardness >=28HRC, finished product presses NB/T 47013.3 standard ultrasound wave inspection, and credit rating all reaches more than II grade.
Effect and consumption to component contained in the present invention select to illustrate below:
C: be to ensure that element necessary to armor plate strength, improves the carbon content in steel and will increase its martensite transfor mation ability, thus improve its intensity.But too high C content is unfavorable to ductility, the toughness of steel.It addition, too high C content also results in more serious center C segregation thus affects the heart portion performance of steel plate.The present invention control its content be 0.35～
0.45%。
Si: be the deoxidant element in steel, and the intensity of steel is improved with solution strengthening form.When Si content is less than 0.10%, deoxidation effect is poor, reduces toughness when Si content is higher.It is 0.20～0.40% that Si content of the present invention controls.
Mn: be to improve quenching degree and the element of intensity, and play solution strengthening effect to make up the loss of strength caused in steel because C content reduces.When Mn content is less than 0.8% in steel, it is impossible to give full play to the effect that intensity guarantees, but then can increase its carbon equivalent when Mn too high levels thus damage welding performance.It addition, Mn easily produces segregation at steel plate center, reduce the impact flexibility in steel plate centre.Therefore, Mn content of the present invention controls is 1.30～1.60%.
Cr: be to improve the quenching degree of steel and contribute to the element that intensity improves.In the case of C content is relatively low, adding appropriate Cr, it is ensured that steel plate reaches required intensity, but if adding excess, then the toughness reducing material also reduces the welding performance of material simultaneously, therefore, its content is controlled 1.80～2.00% by the present invention.
Mo: quenching degree and the intensity of steel can be significantly improved.Adding a small amount of Mo in low-alloy steel to play and overcome the temper brittleness in heat treatment process to improve heat treatment performance, but Mo is also precious metal, and too high levels can increase cost and also reduce the welding performance of material simultaneously.In the present invention, the content of Mo controls 0.15～0.25%.
Ni: being to improve the quenching degree of steel plate and can significantly improve the element of its low-temperature flexibility, On Impact Toughness and ductile-brittle transition temperature have desirable influence.But when Ni content is the highest, steel slab surface easily generates the iron scale that stickiness is higher, it is difficult to remove, affect the surface quality of steel plate.It addition, Ni is also precious metal, too high levels can increase cost.Its content is controlled≤0.30% by the present invention.
Cu: can improve the quenching degree of steel plate and atmospheric corrosion resistance and sea water corrosion resistant, reduces the hydrogen induced cracking sensitivity of steel.But too high Cu content is unfavorable for the welding performance of steel plate, and is easily generated copper brittleness phenomenon, deteriorate the surface property of steel plate.Therefore the present invention controls Cu content is≤0.25%.
Al: be mainly fixed nitrogen and deoxidation.Al with N engage the AlN that formed can crystal grain thinning effectively, but too high levels can damage the toughness of steel.Therefore, the present invention controls its content 0.01～0.05%.
B: being the quenching degree the most significantly element improving steel, B and Nb will significantly improve the quenching degree of steel plate under conditions of coexisting, and B content is too low or too high all unfavorable to quenching degree, too high B will increase welding crack sensibility so that the welding performance of steel plate reduces.Therefore, the present invention controls its content 0.001～0.002%.
S, P: for the objectionable impurities element in steel, be easily formed segregation, the defect such as be mingled with.Bring adverse influence can to the toughness of steel plate and the toughness of welding heat affected zone as impurity element, its content should be reduced as best one can.The present invention controls P≤0.020%, S≤0.010%.
The preparation method of above-mentioned special think gauge 1.2311 mould steel plate, comprises the steps,
1. raw materials for metallurgy is successively through BOF smelting, LF refine, RH refine, and continuous casting uses Low and Constant Velocity casting, and to control slighter compress amount be 9～12mm, produces the round base of diameter 1000mm；To circle base slow cooling, after slow cooling, circle base surface is cleared up, need cutting to obtain circle blank by size.
2. justifying blank and use soaking pit heating, less than 500 DEG C shove charges, stewing steel 2～3 hours, low-temperature zone is warmed up to 800～840 DEG C with the firing rate less than 50 DEG C/h, insulation soaking 3～4 hours；Middle-temperature section to be warmed up to 1000～1050 DEG C less than 80 DEG C/h, heat time heating time 2.5～3 hours；High temperature section heating rate does not limits, be warmed up to 1260 DEG C insulation soaking, control temperature fluctuation at ± 15 DEG C, temperature retention time 14 hours and more than.
3. through high-pressure water descaling after blank is come out of the stove, descaling system pressure is not less than 20Mpa, then carries out four stage rolling, respectively: aximal deformation value formation rolling, width low-angle angular rolling, the rolling of normal broadening, longitudinal finish rolling；
4. the steel plate rolled enters pre-straightening machine and thermal straightening machine is aligned.
5. the steel plate after aligning being carried out high temperature to roll off the production line heap slow cooling, total slow cooling time is more than 48 hours, and slow cooling starts surface lower limit temperature and is not less than 500 DEG C；Carrying out tempering heat treatment after slow cooling, controlling temperature is 540～580 DEG C, and temperature retention time, according to 3～4min/mm, i.e. obtains special think gauge 1.2311 mould steel board finished product after tempering.
The step 1. continuous casting of the present invention 1.2311 mould steel plate preparation method goes out the round base of diameter 1000mm, use continuous casting round bloom production mould steel, abandon die casting method used in the prior art, while being greatly improved the lumber recovery of 1.2311 die steels and reducing production cost, also assures that 1.2311 obtained die steels are in Composition Control, macrostructure, metallographic structure, non-metallic inclusion, microhardness, the aspects such as internal flaw detection and comprehensive mechanical property are all suitable with 1.2311 die steels manufactured by the existing die casting process of employing, meet the civil area demand for 1.2311 die steels.
Compared with prior art, it is an advantage of the current invention that:
(1) manufacture method of a kind of special think gauge 1.2311 mould steel plate " to roll generation forging " is provided, the method uses 1000mm continuous casting round bloom, rolled by soaking pit heating and four-high reversing mill, rely on big compression ratio, big single pass drafts to reach deformation infiltration thus improve sheet material internal soundness, realize the rolling of large round billet to steel plate, production for 1.2311 mould steel plates, it is provided that a kind of brand-new production rolling pathways.
(2) using the characteristic such as the hardness of the mould steel plate of the method production, flaw detection quality all to reach industry requirement, lumber recovery reaches more than 85% especially, compares existing employing molding mode production mould steel, and lumber recovery totally improves about 12%.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The thickness of the special think gauge 1.2311 mould steel plate that the present embodiment relates to is 180mm, and the composition comprised and mass percent thereof be: C:0.40%, Si:0.25
%, Mn:1.55%, P:0.009%, S:0.0018%, Cr:1.93%, Mo:0.22%, Al:0.03%, Ni:0.02%, Cu:0.02%, B:0.0003%, surplus is Fe and inevitable impurity element, carbon equivalent ce V=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15=
1.07。
The production technology of this mould steel plate is as follows:
By the chemical composition configuration raw materials for metallurgy of above-mentioned special think gauge 1.2311 mould steel plate by raw materials for metallurgy successively through BOF smelting, LF refine, RH refine to obtain high cleanliness molten steel, and then the continuous casting round bloom of diameter 1000mm is produced by round billet continuous casting machine, it is 9～12mm that casting process controls slighter compress amount, continuous cast round billets is loaded burial pit slow cooling, after slow cooling, continuous cast round billets surface is cleared up, need cutting to obtain blank by size.
At soaking pit, diameter 1000mm being justified base to heat, heating total time is 30 hours, less than 500 DEG C shove charges, stewing steel 2 hours, low-temperature zone is warmed up to 800 DEG C with the firing rate of≤50 DEG C/h, about 4 hours heat time heating times, at 800+(0～40) DEG C, insulation soaking 3 hours；Middle-temperature section is warmed up to 1000+(0～50 with≤80 DEG C/h) DEG C, about 2.5 hours heat time heating times；High temperature section heating rate does not limits, and is warmed up to 1260 DEG C of insulation soaking, temperature retention time about 14 hours, faces first 1～1.5 hour of tapping, for improving scale removal effect, gradually control temperature to soaking lower limit.
Blank is not less than 20MPa through high-pressure water descaling, descaling system pressure, rolls afterwards, because of the particularity of circle base rolling deformation after coming out of the stove, it is impossible to uses two grades of full-automatic rollings, therefore uses the manual rolling procedure of one-level to roll.Before rolling, by manually planning, calculate corresponding rolling data, develop rolling procedure table, then input computer, manually roll.Actual rolling schedule divides four parts, including the axial rolling before broadening, width low-angle angular rolling or transverse rolling broadening, the rolling of normal broadening, finish rolling and planishing pass.Supplied materials circle base a diameter of Ф 1000mm, because of needs broadening, then the selection of axial rolling passage overall reduction needs, in view of success broadening, through calculating, to use axial rolling 5 passage before broadening, and draught per pass is 80mm, axial rolling to thickness 610mm；Then carry out turning steel transverse rolling broadening, but turn the marginal value of steel because rolling plane width is in, cannot normally send steel to nip, it is impossible to directly transverse rolling broadening, now turn steel and use width low-angle angular rolling mode, angular rolling angle 30 °, positive angular rolling 3 passage, then dihedral rolls 3 passages, single pass reduction settings 28mm, at the end of angular rolling, sotck thinkness is 430mm, and width is 1300mm；The most then according to now width, carrying out the normal broadening rolling of 3 passages, be rolled down to required width, the operation of rolling uses rolling on edge to squeeze limit, finally turns steel and obtains the smooth steel plate of predetermined thickness through 7 passage longitudinal direction finish rolling.
The steel plate rolled enters pre-straightening machine and thermal straightening machine is aligned；
The steel plate aligned carries out high temperature and rolls off the production line heap slow cooling, total slow cooling time was more than more than 48 hours, slow cooling starts the surface temperature that rolls off the production line and is not less than 500 DEG C, temper is carried out after slow cooling, temperature is 550 DEG C, time inside furnace is 3.0min/mm, i.e. obtains the thick special think gauge 1.2311 steel plate of die steel finished product of 180mm after tempering.
Final steel board finished product carries out ultrasonic examination by NB/T 47013.3 standard, and credit rating reaches II grade.
The finished steel plate manufactured via above-mentioned technique has excellent case hardness and core hardness, and high-level flaw detection situation, meets industry and uses requirement, and its performance indications are shown in Table 1.
The hardness of the 1.2311 mould steel plates that table 1 embodiment 1 manufactures and flaw detection index
Embodiment 2
The thickness of the special think gauge 1.2311 mould steel plate that the present embodiment relates to is 250mm, and its composition is by mass percentage: C:0.41%, Si:0.26
%, Mn:1.57%, P:0.010%, S:0.0019%, Cr:1.95%, Mo:0.24%, Al:0.028%, Ni:0.02%, Cu:0.02%, B:0.00028%, surplus is Fe and inevitable impurity element, carbon equivalent ce V=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15=1.1.
Smelting and the manufacturing process of this embodiment are essentially identical with embodiment 1, main difference is that
The technique adjustment of rolling link and follow-up retarded cooling process, tempering process aspect, specific as follows:
Use axial rolling 3 passage before broadening, draught per pass 80～90mm, axial rolling to thickness 640mm；Then carry out turning steel transverse rolling broadening, but turn the marginal value of steel because rolling plane width is in, steel cannot be normally sent to nip, can not direct transverse rolling broadening, now turn steel and use width low-angle angular rolling mode, angular rolling angle 30 °, positive angular rolling 3 passage, then dihedral rolls 3 passages, single pass reduction settings 30mm, at the end of angular rolling, sotck thinkness is 450mm, width is 1500mm, the most then according to now width, carry out the normal broadening rolling of 3 passages, being rolled down to required width, the operation of rolling uses rolling on edge to squeeze limit；Finally turn steel and obtain the flat plate of predetermined thickness through 7 passage longitudinal direction finish rolling.
Steel plate after aligning carries out high temperature and rolls off the production line heap slow cooling, and total slow cooling time is more than 48h, and slow cooling starts surface temperature lower limit and is not less than 550 DEG C；Carrying out temper after slow cooling, temperature is 580 DEG C, and time inside furnace is 4.0min/mm, i.e. obtains the thick special think gauge 1.2311 mould steel plate of finished product 240mm after tempering.
The finished steel plate manufactured via above-mentioned technique has excellent case hardness and core hardness, and high-level flaw detection situation, meets industry and uses requirement, and its performance indications are shown in Table 2.
The hardness of the 1.2311 mould steel plates that table 2 embodiment 2 manufactures and flaw detection index
In addition to the implementation, present invention additionally comprises the technical scheme that other embodiments, all employing equivalents or equivalence substitute mode are formed, all should fall within the scope of the hereto appended claims.
Claims (3)
1. a special think gauge 1.2311 mould steel plate, it is characterized in that: the thickness of described steel plate is 160～250mm, steel plate element and comprise the chemical composition of following mass percent based on Fe: C:0.35～0.45%, Si:0.20～0.40%, Mn:1.30～1.60%, P :≤0.020%, S :≤0.010%, Cr:1.80～2.00%, Mo:0.15～0.25%, Al:0.01～0.05%, Ni :≤0.30%, Cu :≤0.25%, B:0.001～0.002% and inevitable impurity element；Carbon equivalent 0.98～1.2.
The most special think gauge 1.2311 mould steel plate, it is characterised in that: the average surface hardness 30～36HRC of described steel plate, core hardness >=28HRC, finished product presses NB/T 47013.3 standard ultrasound wave inspection, and credit rating all reaches more than II grade.
3. prepare the method for special think gauge 1.2311 mould steel plate described in claim 1 or 2 for one kind, it is characterised in that: comprise the steps,
1. raw materials for metallurgy is successively through BOF smelting, LF refine, RH refine, and continuous casting uses Low and Constant Velocity casting, and to control slighter compress amount be 9～12mm, produces the round base of diameter 1000mm；To circle base slow cooling, after slow cooling, circle base surface is cleared up, need cutting to obtain circle blank by size；
2. justifying blank and use soaking pit heating, less than 500 DEG C shove charges, stewing steel 2～3 hours, low-temperature zone is warmed up to 800～840 DEG C with the firing rate less than 50 DEG C/h, insulation soaking 3～4 hours；Middle-temperature section to be warmed up to 1000～1050 DEG C less than 80 DEG C/h, heat time heating time 2.5～3 hours；High temperature section heating rate does not limits, be warmed up to 1260 DEG C insulation soaking, control temperature fluctuation at ± 15 DEG C, temperature retention time 14 hours and more than；
3. through high-pressure water descaling after blank is come out of the stove, descaling system pressure is not less than 20Mpa, then carries out four stage rolling, respectively: aximal deformation value formation rolling, width low-angle angular rolling, the rolling of normal broadening, longitudinal finish rolling；
4. the steel plate rolled enters pre-straightening machine and thermal straightening machine is aligned；
5. the steel plate after aligning being carried out high temperature to roll off the production line heap slow cooling, total slow cooling time is more than 48 hours, and slow cooling starts surface lower limit temperature and is not less than 500 DEG C；Carrying out tempering heat treatment after slow cooling, controlling temperature is 540～580 DEG C, and temperature retention time, according to 3～4min/mm, i.e. obtains special think gauge 1.2311 mould steel board finished product after tempering.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441780A (en) * | 2018-02-23 | 2018-08-24 | 鞍钢股份有限公司 | Non-quenched and tempered pre-hard plastic die steel plate and preparation process thereof |
| CN110396648A (en) * | 2019-06-29 | 2019-11-01 | 江阴兴澄特种钢铁有限公司 | A kind of special thick alloy mold steel plate of continuous casting billet production and its manufacturing method |
| CN113265575A (en) * | 2021-04-26 | 2021-08-17 | 五矿营口中板有限责任公司 | Preparation method of extra-thick Mn-Cr series die steel |
| WO2021208332A1 (en) * | 2020-04-13 | 2021-10-21 | 绿华投资有限公司 | Manufacturing method for three-layer metal clad steel plate |
| CN114250415A (en) * | 2021-12-10 | 2022-03-29 | 江苏沙钢集团有限公司 | Manufacturing method of large-wall-thickness plastic die steel plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230442A (en) * | 2007-01-22 | 2008-07-30 | 宝山钢铁股份有限公司 | Low-alloy untempered steel for plastic mould frame steel and method for manufacturing same |
| CN101440462A (en) * | 2007-11-21 | 2009-05-27 | 宝山钢铁股份有限公司 | Economical long service life material for mechanical press forging die and manufacturing method thereof |
| CN104911321A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick steel plate production process of plastic dies steel |
| CN105063512A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Plastic die steel and manufacturing method thereof |
-
2016
- 2016-06-30 CN CN201610497930.1A patent/CN105925889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230442A (en) * | 2007-01-22 | 2008-07-30 | 宝山钢铁股份有限公司 | Low-alloy untempered steel for plastic mould frame steel and method for manufacturing same |
| CN101440462A (en) * | 2007-11-21 | 2009-05-27 | 宝山钢铁股份有限公司 | Economical long service life material for mechanical press forging die and manufacturing method thereof |
| CN104911321A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick steel plate production process of plastic dies steel |
| CN105063512A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Plastic die steel and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄军等: "预硬型塑料模具钢1.2311 厚板生产新工艺", 《特钢技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441780A (en) * | 2018-02-23 | 2018-08-24 | 鞍钢股份有限公司 | Non-quenched and tempered pre-hard plastic die steel plate and preparation process thereof |
| CN108441780B (en) * | 2018-02-23 | 2019-10-29 | 鞍钢股份有限公司 | Non-quenched and tempered pre-hard plastic die steel plate and preparation process thereof |
| CN110396648A (en) * | 2019-06-29 | 2019-11-01 | 江阴兴澄特种钢铁有限公司 | A kind of special thick alloy mold steel plate of continuous casting billet production and its manufacturing method |
| CN110396648B (en) * | 2019-06-29 | 2021-04-09 | 江阴兴澄特种钢铁有限公司 | Super-thick alloy die steel plate produced by continuous casting billet and manufacturing method thereof |
| WO2021208332A1 (en) * | 2020-04-13 | 2021-10-21 | 绿华投资有限公司 | Manufacturing method for three-layer metal clad steel plate |
| CN113265575A (en) * | 2021-04-26 | 2021-08-17 | 五矿营口中板有限责任公司 | Preparation method of extra-thick Mn-Cr series die steel |
| CN114250415A (en) * | 2021-12-10 | 2022-03-29 | 江苏沙钢集团有限公司 | Manufacturing method of large-wall-thickness plastic die steel plate |
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Application publication date: 20160907 |