CN109972039A - A kind of high-strength tenacity faces hydrogen pressure steel plate for container and its production method - Google Patents
A kind of high-strength tenacity faces hydrogen pressure steel plate for container and its production method Download PDFInfo
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- CN109972039A CN109972039A CN201910280391.XA CN201910280391A CN109972039A CN 109972039 A CN109972039 A CN 109972039A CN 201910280391 A CN201910280391 A CN 201910280391A CN 109972039 A CN109972039 A CN 109972039A
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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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- 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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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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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Abstract
The invention discloses a kind of high-strength tenacities to face hydrogen pressure steel plate for container and its production method, belongs to metallurgical technology field.Steel plate chemical component composition and its mass percentage are as follows: C:0.08-0.12%, Si:0.50-0.65%, Mn:0.40-0.65%, P≤0.007%, S≤0.004%, Cr:1.00-1.20%, Mo:0.45-0.60%, Ni:0.10-0.20%, Al:0.025-0.040%, surplus are Fe and inevitable impurity；Production method includes steel-making, continuous casting, steel rolling and heat treatment procedure.The present invention optimizes steel-making ingredient, it is designed using low C and low alloyed element Cr, Mo ingredient, strict control Al content in steelmaking process using two stages controlled rolling and rolls rear ACC water cooling, heat treatment process, gained armor plate strength index and impact flexibility are good, and the flaw detection of steel plate and performance are stablized.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of high-strength tenacity faces hydrogen pressure steel plate for container and its production
Method.
Background technique
1.25Cr-0.5Mo-Si is low alloy series steel plate, due to the addition of Cr, Mo element, so that steel plate has well
Heat resistance, be mainly used in the high temperature and pressure such as fischer-tropsch reactor, ammonia convertor and gasification burner, contacted with hydrogen or hydrogen blending agent
Large scale equipment, since steel plate use condition is stringent, the design requirement of steel plate improves in designing institute at present, and intensity improves close
30MPa, and impact temperature is reduced to -30 DEG C by 0 DEG C before, since the alloy content of this steel is low, it is ensured that intensity and low temperature
Impact, production difficulty increase, and have been unable to satisfy high standards using traditional production method.
Organization decided performance, the raising of intensity and the guarantee of low-temperature impact toughness must pass through the ratio of different tissues
To reach.Steel-making ingredient design, the control of steelmaking process component content, rolling and heat treatment process can influence the ratio of different tissues
Example, wherein the achievable original structure of the control of start rolling temperature, finishing temperature and red temperature is uniform and stable in the operation of rolling, guarantees
The raising of the intensity of steel plate can be achieved in the good tissue deposit of subsequent heat treatment, the optimization of heat treatment process.
In conclusion exploitation high-strength tenacity face hydrogen pressure container 1.25Cr-0.5Mo-Si low alloy series steel plate and its
Production method improves the yield strength of steel plate, guarantees steel plate favorable low-temperature impact toughness, meets the stringent use condition of steel plate,
With important Social benefit and economic benefit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high-strength tenacities to face hydrogen pressure steel plate for container and its producer
Method.The present invention improves the obdurability matching of steel plate, guarantees the property of steel plate by the ingredient design and production technology of optimization steel plate
It can stablize.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of high-strength tenacity faces hydrogen pressure container
With steel plate, the steel plate chemical component composition and its mass percentage are as follows: C:0.08-0.12%, Si:0.50-0.65%, Mn:
0.40-0.65%, P≤0.007%, S≤0.004%, Cr:1.00-1.20%, Mo:0.45-0.60%, Ni:0.10-0.20%, Al:
0.025-0.040%, surplus are Fe and inevitable impurity.
Steel plate thickness of the present invention is 70-100mm.
Steel plate yield strength >=260MPa of the present invention, tensile strength 450-585MPa, -30 DEG C of impact >=100J.
The present invention also provides the production method that a kind of high-strength tenacity faces hydrogen pressure steel plate for container, the production method packet
Include steel-making, continuous casting, steel rolling and heat treatment procedure；The steel rolling process is rolled using two stages controlled rolling mode, I stage open rolling temperature
1050-1100 DEG C of degree, II 900-930 DEG C of stage start rolling temperature use ACC water cooling after rolling, control steel plate red temperature 600-700
℃。
Steel making working procedure of the present invention, smelting process are to guarantee that deoxygenation of liquid steel is abundant, and Al contains in molten steel after refining adduction gold
Amount control is forbidden to add Al deoxidation after vacuumizing in 0.025-0.035% to reduce influence of the field trash to steel plate inspection.
Continuous casting working procedure of the present invention, at 1550-1565 DEG C, Casting speed is controlled in 0.70- for cast temperature control
0.80m/s。
Steel rolling process of the present invention, 1230-1250 DEG C of blank heating temperature in the operation of rolling, total heating time 9-
12min/cm。
Heat treatment procedure of the present invention, using normalizing accelerate cooling+high-temperature tempering process, 900-930 DEG C of normalizing temperature,
Total heating time 2-2.5min/mm, water cooling after normalizing, 200-300 DEG C of red temperature after water outlet；730-750 DEG C of tempering temperature, always
Heating time 3.5-4.5min/mm comes out of the stove air-cooled.
The beneficial effects of adopting the technical scheme are that the 1, present invention optimizes steel-making ingredient, use
Low C and the design of low alloyed element Cr, Mo ingredient, not only ensure that intensity index and good impact flexibility, but also can reduce steel plate
Production cost.2, strict control Al content in steelmaking process of the present invention, using ACC water after rolling and roll using two-stage control
It is cold, it ensure that the good crystal grain deposit of steel plate, matched by the obdurability that heat treatment process further improves steel plate, guarantee steel
The flaw detection and stability of plate.3, steel plate yield strength >=260MPa of the present invention, tensile strength 450-585MPa, -30 DEG C of punchings
Hit >=100J；Steel plate inspection meets I grade of NB/T47013.3.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
It is 70mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.025% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1550 DEG C, Casting speed is controlled in 0.70m/s for cast temperature control；
(3) steel rolling process: 1230 DEG C of blank heating temperature in the operation of rolling, total heating time 9min/cm；Using two stages controlled rolling
Mode rolls, I 1050 DEG C of stage start rolling temperature, II 900 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns red
600 DEG C of temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 900 DEG C of normalizing temperature, total heating time 2min/
Mm, water cooling after normalizing, 200 DEG C of red temperature after water outlet；730 DEG C of tempering temperature, total heating time 3.5min/mm comes out of the stove air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 310MPa,
Tensile strength 475MPa, -30 DEG C of impact 112J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 2
It is 75mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.035% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1565 DEG C, Casting speed is controlled in 0.80m/s for cast temperature control；
(3) steel rolling process: 1250 DEG C of blank heating temperature in the operation of rolling, total heating time 12min/cm；It is controlled using two stages
The mode of rolling rolls, I 1100 DEG C of stage start rolling temperature, II 930 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns
700 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 930 DEG C of normalizing temperature, total heating time
2.5min/mm, water cooling after normalizing, 300 DEG C of red temperature after water outlet；750 DEG C of tempering temperature, total heating time 4.5min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 320MPa,
Tensile strength 510MPa, -30 DEG C of impact 130J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 3
It is 85mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.030% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1560 DEG C, Casting speed is controlled in 0.75m/s for cast temperature control；
(3) steel rolling process: 1240 DEG C of blank heating temperature in the operation of rolling, total heating time 10min/cm；It is controlled using two stages
The mode of rolling rolls, I 1080 DEG C of stage start rolling temperature, II 910 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns
650 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 910 DEG C of normalizing temperature, total heating time
2.2min/mm, water cooling after normalizing, 240 DEG C of red temperature after water outlet；740 DEG C of tempering temperature, total heating time 4.0min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 290MPa,
Tensile strength 487MPa, -30 DEG C of impact 135J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 4
It is 100mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.027% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1555 DEG C, Casting speed is controlled in 0.72m/s for cast temperature control；
(3) steel rolling process: 1245 DEG C of blank heating temperature in the operation of rolling, total heating time 11min/cm；It is controlled using two stages
The mode of rolling rolls, I 1070 DEG C of stage start rolling temperature, II 920 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns
660 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 920 DEG C of normalizing temperature, total heating time
2.3min/mm, water cooling after normalizing, 260 DEG C of red temperature after water outlet；745 DEG C of tempering temperature, total heating time 3.8min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 320MPa,
Tensile strength 564MPa, -30 DEG C of impact 145J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 5
It is 80mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.028% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1562 DEG C, Casting speed is controlled in 0.77m/s for cast temperature control；
(3) steel rolling process: 1235 DEG C of blank heating temperature in the operation of rolling, total heating time 10.5min/cm；Using two stages
Controlled rolling mode rolls, I 1090 DEG C of stage start rolling temperature, II 915 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and controls steel plate
630 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 925 DEG C of normalizing temperature, total heating time
2.1min/mm, water cooling after normalizing, 210 DEG C of red temperature after water outlet；735 DEG C of tempering temperature, total heating time 4.2min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 264MPa,
Tensile strength 452MPa, -30 DEG C of impact 105J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 6
It is 90mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.033% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1558 DEG C, Casting speed is controlled in 0.73m/s for cast temperature control；
(3) steel rolling process: 1232 DEG C of blank heating temperature in the operation of rolling, total heating time 11.5min/cm；Using two stages
Controlled rolling mode rolls, I 1060 DEG C of stage start rolling temperature, II 925 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and controls steel plate
680 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 905 DEG C of normalizing temperature, total heating time
2.4min/mm, water cooling after normalizing, 280 DEG C of red temperature after water outlet；738 DEG C of tempering temperature, total heating time 3.6min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 286MPa,
Tensile strength 472MPa, -30 DEG C of impact 115J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 7
It is 95mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.026% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1564 DEG C, Casting speed is controlled in 0.78m/s for cast temperature control；
(3) steel rolling process: 1247 DEG C of blank heating temperature in the operation of rolling, total heating time 9.5min/cm；It is controlled using two stages
The mode of rolling rolls, I 1065 DEG C of stage start rolling temperature, II 905 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns
690 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 915 DEG C of normalizing temperature, total heating time
2.2min/mm, water cooling after normalizing, 220 DEG C of red temperature after water outlet；746 DEG C of tempering temperature, total heating time 3.9min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 307MPa,
Tensile strength 495MPa, -30 DEG C of impact 120J；Steel plate inspection meets I grade of NB/T47013.3.
Embodiment 8
It is 88mm, chemical component group that the present embodiment high-strength tenacity, which faces hydrogen pressure container with 1.25Cr-0.5Mo-Si steel plate thickness,
At and mass percentage be shown in Table 1.
The production method of steel plate includes steel-making, continuous casting, steel rolling and heat treatment procedure, and specific process step is as described below:
(1) steel making working procedure: Al content is controlled 0.032% in molten steel after refining adduction gold；
(2) continuous casting working procedure: at 1564 DEG C, Casting speed is controlled in 0.72m/s for cast temperature control；
(3) steel rolling process: 1243 DEG C of blank heating temperature in the operation of rolling, total heating time 10min/cm；It is controlled using two stages
The mode of rolling rolls, I 1085 DEG C of stage start rolling temperature, II 912 DEG C of stage start rolling temperature, and ACC water cooling is used after rolling, and control steel plate returns
610 DEG C of red temperature；
(4) heat treatment procedure: using normalizing accelerate cooling+high-temperature tempering process, 922 DEG C of normalizing temperature, total heating time
2.3min/mm, water cooling after normalizing, 250 DEG C of red temperature after water outlet；742 DEG C of tempering temperature, total heating time 4.3min/mm, out
Furnace is air-cooled.
The present embodiment high-strength tenacity faces hydrogen pressure container 1.25Cr-0.5Mo-Si plate property: yield strength 332MPa,
Tensile strength 583MPa, -30 DEG C of impact 125J；Steel plate inspection meets I grade of NB/T47013.3.
The chemical component of 1 embodiment 1-8 1.25Cr-0.5Mo-Si steel plate of table forms and mass percentage (%)
Ingredient surplus is Fe and inevitable impurity in table 1.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (8)
1. a kind of high-strength tenacity faces hydrogen pressure steel plate for container, which is characterized in that the steel plate chemical component composition and its quality
Percentage composition are as follows: C:0.08-0.12%, Si:0.50-0.65%, Mn:0.40-0.65%, P≤0.007%, S≤0.004%, Cr:
1.00-1.20%, Mo:0.45-0.60%, Ni:0.10-0.20%, Al:0.025-0.040%, surplus be Fe and inevitably it is miscellaneous
Matter.
2. a kind of high-strength tenacity according to claim 1 faces hydrogen pressure steel plate for container, which is characterized in that the steel plate is thick
Degree is 70-100mm.
3. a kind of high-strength tenacity according to claim 1 faces hydrogen pressure steel plate for container, which is characterized in that the steel plate is bent
Take intensity >=260MPa, tensile strength 450-585MPa, -30 DEG C of impact >=100J.
4. face the production method of hydrogen pressure steel plate for container based on a kind of high-strength tenacity described in claim 1-3 any one,
It is characterized in that, the production method includes steel-making, continuous casting, steel rolling and heat treatment procedure；The steel rolling process, using two stages
Controlled rolling mode rolls, I 1050-1100 DEG C of stage start rolling temperature, II 900-930 DEG C of stage start rolling temperature, and ACC water is used after rolling
It is cold, control 600-700 DEG C of steel plate red temperature.
5. the production method that a kind of high-strength tenacity according to claim 4 faces hydrogen pressure steel plate for container, which is characterized in that
The steel making working procedure, Al content is controlled in 0.025-0.035% in molten steel after refining adduction is golden.
6. the production method that a kind of high-strength tenacity according to claim 4 faces hydrogen pressure steel plate for container, which is characterized in that
The continuous casting working procedure, at 1550-1565 DEG C, Casting speed is controlled in 0.70-0.80m/s for cast temperature control.
7. a kind of high-strength tenacity according to claim 4-6 any one faces the production method of hydrogen pressure steel plate for container,
It is characterized in that, the steel rolling process, 1230-1250 DEG C of blank heating temperature in the operation of rolling, total heating time 9-12min/
cm。
8. a kind of high-strength tenacity according to claim 4-6 any one faces the production method of hydrogen pressure steel plate for container,
It is characterized in that, the heat treatment procedure, cooling+high-temperature tempering process is accelerated using normalizing, 900-930 DEG C of normalizing temperature, always
Heating time 2-2.5min/mm, water cooling after normalizing, 200-300 DEG C of red temperature after water outlet；It is 730-750 DEG C of tempering temperature, total to add
Hot time 3.5-4.5min/mm, comes out of the stove air-cooled.
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| CN110551879A (en) * | 2019-09-19 | 2019-12-10 | 舞阳钢铁有限责任公司 | Production method of low-strength-level Cr-Mo steel plate |
| CN113088633A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of Cr-Mo steel plate |
| CN113088632A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of SA387Gr11CL2 steel plate |
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| CN110551879B (en) * | 2019-09-19 | 2021-06-22 | 舞阳钢铁有限责任公司 | Production method of low-strength-level Cr-Mo steel plate |
| CN113088633A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of Cr-Mo steel plate |
| CN113088632A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of SA387Gr11CL2 steel plate |
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Application publication date: 20190705 |