CN109609849A - One kind low activation martensitic steel containing Si and its heat treatment method - Google Patents
One kind low activation martensitic steel containing Si and its heat treatment method Download PDFInfo
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- CN109609849A CN109609849A CN201811620985.2A CN201811620985A CN109609849A CN 109609849 A CN109609849 A CN 109609849A CN 201811620985 A CN201811620985 A CN 201811620985A CN 109609849 A CN109609849 A CN 109609849A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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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- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C21D2211/008—Martensite
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Abstract
The invention proposes a kind of low activation martensitic steels containing Si and its heat treatment method, the alloying element quality of the low activation martensitic steel to account for the percentage of gross mass are as follows: 0.04%≤C≤0.08%, 0.02%≤N≤0.08%, 0.25%≤Si≤0.65%, 0.08%≤Ta≤0.18%, 0.50%≤Mn≤0.70%, 1.40%≤W≤1.60%, 8.5%≤Cr≤9.5%, 0.15%≤V≤0.35%, O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.The content of the content and suitable control C that improve N is the MX phase in order to form small and dispersed in subsequent heat treatment；Introducing Si is and to improve the ability of its antioxidant anticorrosive without damaging its toughness to play the role of solution strengthening；Low activation martensitic steel plate heat treatment after roll forming includes quenching and tempering；The low activation martensitic steel has good mechanical performance and anti-radiation performance.
Description
Technical field
The present invention relates to martensite steel technical fields, specifically, the present invention relates to a kind of low activation martensitic steels containing Si
And its heat treatment method.
Background technique
Nuclear fusion energy is considered as a kind of almost inexhaustible " cleaning " energy, and solves following mankind energy problem
Important channel.Fusion structural material problem is one of the critical issue for restricting fusion and being able to achieve.Fusion reactor blanket Service Environment
It is extremely harsh, it is severe to face high temperature, high heat flux density, high-energy neutron irradiation, complicated mechanical load and high temperature oxidation and corrosion etc.
Service condition.Compared with austenitic steel, its geometric dimension under radiation parameter is steady as structure member for low activation martensitic steel
Qualitative preferable, void swelling rate and thermal expansion coefficient are lower, thermal conductivity and excellent in mechanical performance, it is considered to be develop the following fusion
A kind of important feature material of demonstration reactor and fusion power reactor.
Stable tempered martensite lath and tiny precipitated phase are to guarantee low activation ferrite under long-time high-temperature service
Steel has an important factor for excellent mechanical performances.M during high temperature is on active service for a long time23C6The aggregation of carbide is roughened and tissue moves back
Change the sharply deterioration for leading to mechanical behavior under high temperature, so as to cause the failure of material.
Therefore, be the comprehensive performance for improving low activation martensitic steel, it is necessary to develop it is new have very good mechanical properties and
The low activation martensitic steel of anti-radiation performance.
Summary of the invention
The present invention is directed to solve above-mentioned technical problem at least to a certain extent, for this purpose, the purpose of the present invention is to provide
A kind of low activation martensitic steel containing Si and its heat treatment method with good comprehensive performance.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of low activation martensitic steel containing Si, the alloying element quality of the low activation martensitic steel account for the percentage of gross mass
Are as follows: 0.04%≤C≤0.08%, 0.02%≤N≤0.08%, 0.25%≤Si≤0.65%, 0.08%≤Ta≤0.18%,
0.50%≤Mn≤0.70%, 1.40%≤W≤1.60%, 8.5%≤Cr≤9.5%, 0.15%≤V≤0.35%, O <
0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.Wherein, the N of high-content can introduce more MX (M for gold
Belong to element, X is C or N) phase；The Si of high-content can improve the mechanical behavior under high temperature and anti-oxidant corruption of low activation martensitic steel
Erosion behavior, so as to significantly improve the comprehensive mechanical property of low activation martensitic steel.The low activation martensitic steel has as a result,
Excellent mechanical property and anti-radiation performance.And there is suitable C element, so that C and gold in above-mentioned low activation martensitic steel
Belong to element and form appropriate, tiny carbide, not only can be improved the comprehensive performance of low activation martensitic steel, while can be to avoid
Since C content excessively generates coarse M during military service23C6Particle causes performance indicator to deteriorate.
Preferably, the alloying element quality of the above-mentioned low activation martensitic steel containing Si accounts for the percentage of gross mass are as follows: 0.055%
C, 0.058%N, 0.28%Si, 0.12%Ta, 0.50%Mn, 1.52%W, 8.95%Cr, 0.22%V, O < 0.005%, P <
0.005%, S < 0.005%, surplus are matrix Fe.It is possible thereby to mention low activation martensitic steel comprehensive performance significantly
It is high.
Preferably, the mass content of the impurity of the above-mentioned low activation martensitic steel containing Si is 0.01% or less, wherein described miscellaneous
Matter includes at least one of Al, Ni, Mo, Nb, Co and Cu.Thus impurity content is controlled in 0.01 weight % hereinafter, can be with
Avoid low activation martensitic steel reduced performance.
The heat treatment method of present invention low activation martensitic steel containing Si, to the low activation martensitic steel plate after roll forming
Carry out quenching and tempering；Low activation martensitic steel plate quenching treatment after roll forming includes: to take the photograph 1000~1020
It is kept the temperature at a temperature of family name's degree, soaking time is 2~3 times of steel ingot effective thickness；Later 850~860 degrees Celsius at a temperature of,
The steel ingot is kept the temperature, soaking time is 1.5~2 times of steel ingot effective thickness；And in air, the steel ingot is cooled to
Room temperature；The tempering of quenched low activation martensitic steel plate include: 750~760 degrees Celsius at a temperature of keep the temperature, protect
The warm time is 4~5 times of steel ingot effective thickness；And in air, the steel ingot is cooled to room temperature；
The unit of soaking time described in above-mentioned quenching and tempering is millimeter, and the unit of steel ingot effective thickness is point
Clock.
Above-mentioned moderate temperature soak heat treatment is able to suppress M as a result,23C6It is mutually precipitated, while guaranteeing the abundant precipitation of MX phase,
It can be further improved the mechanical property and anti-radiation performance of low activation martensitic steel by using above-mentioned heat treatment process.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the tissue topography of the low activation martensitic steel of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, below with reference to
The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
On the one hand the invention proposes a kind of low activation martensitic steel containing Si, the alloying element matter of the low activation martensitic steel
Amount accounts for the percentage of gross mass are as follows: 0.04%≤C≤0.08%, 0.02%≤N≤0.08%, 0.25%≤Si≤0.65%,
0.08%≤Ta≤0.18%, 0.50%≤Mn≤0.70%, 1.40%≤W≤1.60%, 8.5%≤Cr≤9.5%,
0.15%≤V≤0.35%, O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.
The low activation martensitic steel of a kind of new component and proportion is proposed thus according to the embodiment of the present invention, wherein
The N of high-content can introduce more MX phases, the Si of high-content can improve low activation martensitic steel mechanical behavior under high temperature and
Antioxidant anticorrosive behavior, so as to significantly improve the comprehensive mechanical property of low activation martensitic steel.
According to a particular embodiment of the invention, work of the main alloy element in said components in low activation martensitic steel
With as follows:
Nitrogen (N): it is MX (X that the content of N, which is 0.02~0.08 weight %, N, in the low activation martensitic steel of the embodiment of the present invention
For the essential element that C or N) is mutually formed, due to containing a large amount of MX phase shape in the low activation martensitic steel of the embodiment of the present invention
At element (Ta, V, W).The raising of N content can make up the amount that C element forms aspect in MX phase.
Carbon (C): C is austenite former, and interstitial atom can form carbide with metallic element, improve low activation
The mechanical property of martensite steel, but C element too high levels can then generate coarse M during military service23C6Particle, causing property
It can index deterioration.Therefore the content of C element, the small differences of even content the performance of low activation martensitic steel can all be generated compared with
It is big to influence, such as influence the Flouride-resistani acid phesphatase brittleness of low activation martensitic steel.Due in the low activation martensitic steel of the embodiment of the present invention
The C for including is 0.04-0.08 weight %, it is possible thereby to avoid coarse M23C6The generation of particle, so that low activation geneva
Body steel is provided with good radiation resistance.
Silicon (Si): the content of Si is that 0.25~0.65 weight %, Si is in the low activation martensitic steel of the embodiment of the present invention
Solution strengthening element in steel.Si in steel material can significantly improve its antioxygenic property and anti-liquid lead bismuth corrosive power.
And the Si contained in low activation martensitic steel of the embodiment of the present invention can improve the resistance to corrosion of low activation martensite, thus
So that low activation martensitic steel is provided with good mechanical performance.
As the preferred embodiment of the present invention, the alloying element quality of above-mentioned low activation martensitic steel accounts for the hundred of gross mass
Divide ratio are as follows: 0.055%C, 0.058%N, 0.28%Si, 0.12%Ta, 0.50%Mn, 1.52%W, 8.95%Cr, 0.22%V,
O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.Thus there is high-content in above-mentioned low activation martensitic steel
N and Si element so that have the carbide of more tiny MX types in low activation martensitic steel, the thus low activation geneva
There is body steel excellent mechanical property and anti-good fortune to shine performance.And there is suitable C element in above-mentioned low activation martensitic steel, make
It obtains C and metallic element forms appropriate, tiny carbide, the comprehensive performance of low activation martensitic steel not only can be improved, simultaneously
Coarse M can be excessively generated during military service to avoid due to C content23C6Particle causes performance indicator to deteriorate.
Another preferred embodiment according to the present invention, the content of the impurity of the low activation martensitic steel containing Si is in 0.01 weight
Measure % hereinafter, it is possible thereby to further increase the comprehensive performance of low activation martensitic steel, wherein impurity include Al, Ni, Mo, Nb,
At least one of Co and Cu.
For the mechanical property problem of low activation martensitic steel, the method that the embodiment of the present invention prepares low activation martensitic steel
By introducing silicon (Si) and improving the content of nitrogen (N), design proposes a kind of ingredient of the low activation martensitic steel of new component, in turn
Improve its mechanical property and anti-radiation performance.N and C is the one of the chief elements to form MX phase, and the present invention is using high N at setting up separately
Meter can introduce more tiny MX silicon carbide objects from ingredient design.It can be prepared with good comprehensive
Can low activation martensitic steel, such as can significantly improve the shock resistance of low activation martensitic steel, high temperature creep property with
And anti-radiation performance etc..
The present invention can significantly improve the comprehensive performance for the low activation martensitic steel being prepared by using said components,
Further, the present inventor also further carries out the heat treatment method in the method for preparing low activation martensitic steel
Optimization, to further increase the comprehensive performance that low activation martensitic steel is prepared.
For this purpose, on the other hand, the invention also provides the heat treatment methods of the low activation martensitic steel containing Si, to roll forming
Low activation martensitic steel plate afterwards carries out quenching and tempering；According to one embodiment of present invention, after roll forming
Low activation martensitic steel plate quenching treatment include: 1000~1020 degrees Celsius at a temperature of keep the temperature, soaking time is steel ingot
Between 2 times to 3 times of effective thickness；850~860 degrees Celsius at a temperature of keep the temperature, soaking time is steel ingot effective thickness
Between 1.5 times to 2 times；And in air, steel ingot is cooled to room temperature.According to a particular embodiment of the invention, steel ingot is effective
The definition of thickness is referring to GB/T 7232-1999, and the unit of steel ingot effective thickness is millimeter, soaking time in the embodiment of the present invention
Unit be minute.
According to one embodiment of present invention, the tempering in the above method includes: the temperature at 750~760 degrees Celsius
The lower heat preservation of degree, soaking time is between 4 times to 5 times of steel ingot effective thickness；And in air, steel ingot is cooled to room temperature.
M with larger size23C6The roughening of carbide is a main cause for causing low activation martensitic steel to fail.
And the Precipitation Temperature of MX phase is apparently higher than M23C6Precipitation Temperature, can be found after austenitizing at a moderate temperature soak
Reason is inhibiting M23C6While mutually precipitation MX phase can be sufficiently precipitated.Since the roughening growth rate of MX phase is far smaller than M23C6
Roughening growth rate, furthermore solid solubility is very low in the base for the carbides such as V, thus pass through moderate temperature soak
There is the MX phase of a large amount of small and disperseds in matrix afterwards.So as to improve the comprehensive mechanical property of low activation martensitic steel.
For this purpose, still another embodiment in accordance with the present invention, in the above-mentioned method for preparing low activation martensitic steel, at quenching
Carry out intermediate heat-treatment between reason and tempering, specifically include: 850~860 degrees Celsius at a temperature of, will be by solid solution
The steel ingot of reason is kept the temperature, and the time of the heat preservation is 1.5~2 times of the steel ingot effective thickness.Above-mentioned intermediate temperature as a result,
Degree heat preservation heat treatment is able to suppress M23C6It is mutually precipitated, while guaranteeing the abundant precipitation of MX phase, by using above-mentioned heat treatment process
It can be further improved the mechanical property and anti-radiation performance of low activation martensitic steel.
For the mechanical property problem of low activation martensitic steel, the present invention is by improving silicon (Si) content and introducing nitrogen (N)
Content proposes that the ingredient and its heat treatment process of a kind of low activation martensitic steel of new component, the steel grade have good mechanical property
Energy and anti-radiation performance.N and C is the essential element to form MX phase, and the present invention is designed using the ingredient of high N, while improving two
The content of element can introduce more tiny MX silicon carbide objects from ingredient design.Moderate temperature soak heat treatment can be
Inhibit M23C6It is excellent to be further ensured that the steel grade has from heat treatment process for the abundant precipitation for guaranteeing MX phase while mutually precipitation
Mechanical property and anti-radiation performance.The method repeatability for preparing low activation martensitic steel of the embodiment of the present invention is high, thus
Large-scale industrial production may be implemented.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1 (ingredient designs the influence to performance)
Qualified low activation martensitic steel, the alloy member of the low activation martensitic steel have been prepared using ingredient of the invention
Quality amount accounts for the percentage of gross mass are as follows: 0.055%C, 0.058%N, 0.28%Si, 0.12%Ta, 0.50%Mn, 1.52%
W, 8.95%Cr, 0.22%V, O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.By mentioned component raw material
After casting, the steel plate for forging and pressing, being rolled into 16 millimeters (its effective thickness is 16), using following heat treatment process:
45 minutes are kept the temperature in 1015 degrees Celsius of stove, is subsequently moved to keep the temperature 30 minutes in the stove that another temperature is 855 degrees Celsius,
It is air-cooled to room temperature；It is then heated to 755 degrees Celsius to be tempered 75 minutes, is air-cooled to room temperature.
Evaluation index:
The rigid organizational topography of the low activation martensite that above-described embodiment method is prepared is shown in Fig. 1.
Its ambient temperature mechanical properties is measured, measuring method is according to GB/T228-2002 and GB/T229-2007.
Measurement result:
1, tensile strength 657MPa；
2, yield strength 531MPa；
3, elongation after fracture 23%；
4, the contraction percentage of area 71%
4, ballistic work 239J.
Compared with the performance for having disclosed the low activation martensitic steel of fusion reactor of report, new component that the present invention designs
Steel grade have excellent obdurability.
Embodiment 2 (influence of the heat treatment to high temperature creep property)
Sample 2: the alloying element quality of the raw material accounts for the percentage of gross mass are as follows: 0.046%C, 0.062%N,
0.35%Si, 0.09%Ta, 0.55%Mn, 1.49%W, 9.15%Cr, 0.19%V, O < 0.005%, P < 0.005%, S <
0.005%, surplus is matrix Fe.Mentioned component raw material is passed through to steel plate (its effective thickness for casting, forging and pressing, being rolled into 16 millimeters
Degree is after 16), using following heat treatment process: keeping the temperature 45 minutes under 1010 degrees Celsius, be then air-cooled to room temperature；Then
It is heated to 755 degrees Celsius to be tempered 75 minutes, is air-cooled to room temperature.Sample 2 is finally prepared.
High-temerature creep mechanics performance determining:
Experiment condition: 550 degrees Celsius, 270MPa.Specific experiment method is executed according to GB/T2039-2012.
Measurement result: the plastic elongation after experiment 36 hours is 3.25%；
There is preferable high temperature creep property using the low activation martensitic steel of present invention method preparation as a result,
Moderate soak is heat-treated the high temperature creep property that more can be further improved the steel alloy.
Embodiment 3 (influence of the heat treatment to high temperature tensile properties)
Sample 3: the alloying element quality of the raw material accounts for the percentage of gross mass are as follows: 0.061%C, 0.036%N,
0.49%Si, 0.11%Ta, 0.52%Mn, 1.54%W, 8.51%Cr, 0.24%V, O < 0.005%, P < 0.005%, S <
0.005%, surplus is matrix Fe.Mentioned component raw material is passed through to steel plate (its effective thickness for casting, forging and pressing, being rolled into 16 millimeters
Degree is after 16), using following heat treatment process: keeping the temperature 45 minutes under 1015 degrees Celsius, be then air-cooled to room temperature；Then
It is heated to 755 degrees Celsius to be tempered 75 minutes, is air-cooled to room temperature.Sample 3 is finally prepared.
Mechanical behavior under high temperature measurement:
Experiment condition: 550 degrees Celsius of Mechanics Performance Testings.Specific experiment method is executed according to GB/T2039-2012.
1, tensile strength 539MPa；
2, elongation after fracture 34%；
There is preferable mechanical behavior under high temperature using the low activation martensitic steel of present invention method preparation as a result,
Novel thermal process technique more can be further improved the mechanical behavior under high temperature of the steel alloy.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (4)
1. a kind of low activation martensitic steel containing Si, which is characterized in that the total matter of alloying element quality Zhan of the low activation martensitic steel
The percentage of amount are as follows: 0.04%≤C≤0.08%, 0.02%≤N≤0.08%, 0.25%≤Si≤0.65%, 0.08%≤
Ta≤0.18%, 0.50%≤Mn≤0.70%, 1.40%≤W≤1.60%, 8.5%≤Cr≤9.5%, 0.15%≤V≤
0.35%, O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe；
The steel of above-mentioned chemical component and weight percent is Cr-W-V-Ta-Si-N system low activation martensitic steel, wherein 0.02%
~0.08% N can promote the precipitation of MX phase in drawing process, and it is steady under neutron irradiation environment to help to improve steel
It is qualitative；0.25%~0.65% Si can play the role of solution strengthening, and improve its mechanical behavior under high temperature and anti-oxidant corruption
The ability of erosion is without damaging its toughness；0.04%~0.08% C can make steel have good processing performance and Flouride-resistani acid phesphatase hard
Change ability；8.5%~9.5% Cr can improve the resistance to corrosion of steel and have low irradiation hardening ability；0.50%~
0.70% Mn can guarantee that steel finally obtains full martensitic structure；V and Ta is solution strengthening and precipitation strength element；It drops as far as possible
The content of low O, P and S help to improve the obdurability of steel and have low ductile-brittle transition temperature DBTT.
2. low activation martensitic steel containing Si according to claim 1, which is characterized in that the conjunction of the low activation martensitic steel
Gold element quality accounts for the percentage of gross mass are as follows: 0.055%C, 0.058%N, 0.28%Si, 0.12%Ta, 0.50%Mn,
1.52%W, 8.95%Cr, 0.22%V, O < 0.005%, P < 0.005%, S < 0.005%, surplus are matrix Fe.
3. low activation martensitic steel containing Si according to claim 1, which is characterized in that the gross mass content of impurity is
0.01% or less, wherein the impurity includes at least one of Al, Ni, Mo, Nb, Co and Cu.
4. the heat treatment method of the low activation martensitic steel described in claim 1 containing Si, it is characterised in that: after roll forming
Low activation martensitic steel plate carries out quenching and tempering；Low activation martensitic steel plate after roll forming is quenched packet
Include: 1000~1020 degrees Celsius at a temperature of keep the temperature, soaking time is 2~3 times of steel ingot effective thickness；Later 850~
At a temperature of 860 degrees Celsius, the steel ingot is kept the temperature, soaking time is 1.5~2 times of steel ingot effective thickness；And in air
In, the steel ingot is cooled to room temperature；The tempering of quenched low activation martensitic steel plate includes: to take the photograph 750~760
It is kept the temperature at a temperature of family name's degree, soaking time is 4~5 times of steel ingot effective thickness；And in air, the steel ingot is cooled to
Room temperature；
The unit of soaking time described in above-mentioned quenching and tempering is millimeter, and the unit of steel ingot effective thickness is minute.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876609A (en) * | 2020-07-29 | 2020-11-03 | 西安建筑科技大学 | Oxide-reinforced low-activation steel, electroslag remelting slag system and smelting method |
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