CN106566993A - NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate - Google Patents
NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate Download PDFInfo
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
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- 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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- 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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- 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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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The invention discloses an NM500 thick plate with excellent low-temperature impact toughness and a production method for the NM500 thick plate. The production method comprises a heating process, a rolling process and a thermal treatment process. The thick plate consists of the following components in percentage by weight: less than or equal to 0.31% of C, less than or equal to 0.50% of Si, less than or equal to 1.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 1.50% of Cr, less than or equal to 0.50% of Mo, less than or equal to 1.00% of Ni, greater than or equal to 0.020% but less than or equal to 0.050% of Al, less than or equal to 0.002% of B, less than or equal to 0.020% of Ti, less than or equal to 0.05% of Nb, less than or equal to 0.05% of V, and the balance of Fe and inevitable impurities. The NM500 thick plate adopts a low-carbon equivalent component design to ensure welding performances of the steel plate; by adding proper alloy elements and adopting a proper rolling and thermal treatment process, the produced steel plate has a uniform and fine structure and excellent comprehensive mechanical property. The obtained thick plate has maximum thickness which can reach 80 mm, has the characteristics of moderate strength, and excellent low-temperature impact toughness at a low temperature of (-)40 DEG C at a position which is 1/4 of the plate thickness, and has a wide application prospect.
Description
Technical field
The present invention relates to a kind of abrasion-resistant stee, especially a kind of NM500 slabs with excellent low temperature impact toughness and its life
Product method.
Background technology
Abrasion-resistant stee has higher intensity and hardness, is widely used in the engineering machinery such as mine, colliery, metallurgy mainly wear-resisting
In work pieces process and production.Such steel plate will not only have higher-strength and hardness, but also have certain toughness and good
Welding performance.At present, domestic standard GB/T24186-2009《Engineering machinery high-strength abrasion-proof steel plate》The NM500 steel of defined
Plate maximum gauge is 70mm, and only hardness number required.
Along with engineering machinery to the development maximized, while the life-span to ensure steel plate to greatest extent, to abrasion-resistant stee
Intensity, low temperature impact properties etc. propose preferably requirement.Compared with overseas enterprise such as Sweden SSAB like products, the country is raw
Also there is the big gap of friendship at the aspect such as properties of product uniformity and low-temperature flexibility in the NM500 steel plates of product.
The content of the invention
The technical problem to be solved in the present invention be to provide a kind of comprehensive mechanical property it is good with excellent low temperature impact toughness
NM500 slabs；Present invention also offers a kind of production method of the NM500 slabs with excellent low temperature impact toughness.
To solve above-mentioned technical problem, the present invention is made up of the composition of following weight percentage：C≤0.31%, Si≤
0.50%, Mn≤1.60%, P≤0.015%, S≤0.010%, Cr≤1.50%, Mo≤0.50%, Ni≤1.00%, 0.020%≤Al
≤ 0.050%, B≤0.002%, Ti≤0.020, Nb≤0.05%, V≤0.05%, balance of Fe and inevitable impurity.
- 40 DEG C of impact of collision work(>=20 joule of slab of the present invention.
The maximum gauge of slab of the present invention is 80mm.
The inventive method includes heating, rolling process and heat treatment step；The slab is by above-mentioned weight percentage
Composition is constituted.
Heating process described in the inventive method：Heating-up temperature≤1240 DEG C, 1220 DEG C～1240 DEG C of soaking temperature, soaking zone
Insulation >=60min, total heat time heating time >=11min/cm steel billet thickness.
Rolling process described in the inventive method：1050 DEG C～1150 DEG C of first stage start rolling temperature, the steel thickness that dries in the air is H+
50mm, wherein H are finished product plank thickness（mm）；Second stage start rolling temperature≤950 DEG C, finishing temperature >=830 DEG C enter water after rolling
Control cold, 650 DEG C～750 DEG C of red temperature.In the rolling process, roll rear stacking slow cooling, 48 hours stacking time and more than.
Heat treatment step described in the inventive method adopts quenching+lonneal technique.The heat treatment step：Hardening heat
For 910 DEG C ± 10 DEG C；Temperature is 180 DEG C ± 10 DEG C, and temperature retention time is (3.8～4.5) × t minutes, and t is slab millimeters thick
Degree；Air cooling after insulation.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention has that obdurability is excellent, low-temperature impact is tough
Property it is good, with plate hardness it is uniform the features such as, maximum gauge up to 80mm, with excellent comprehensive mechanical property.
The inventive method employs low-carbon-equivalent composition design to guarantee the welding performance of steel plate, by adding appropriate alloy
Element and suitable rolling and Technology for Heating Processing, so that produce steel plate is with uniformly tiny organizational structure and excellent comprehensive
Close mechanical property；The maximum gauge of the inventive method gained slab can reach 80mm, with -40 DEG C at moderate strength, thickness of slab 1/4
The characteristics of low-temperature impact toughness is excellent, has broad application prospects.The inventive method gained slab has following characteristics：1. it is described
Steel plate maximum gauge is 80mm；2. yield strength is in more than 1250MPa, tensile strength in more than 1450MPa, elongation percentage A50% >=
8%；3. -40 DEG C of impact of collision work(>=20 joule；④Ceq≤0.76（Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15）；
5. surface of steel plate Brinell hardness is between 470HB～540HB.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm（Steel billet）.
（2）Heating process：1235 DEG C of heating-up temperature, 1228 DEG C of soaking temperature, soaking zone insulation 65min, total heat time heating time
382 minutes.
（3）Rolling process：Using two-stage controlled rolling process；First stage be the austenite recrystallization stage, start rolling temperature
1055 DEG C, the steel thickness that dries in the air is 135mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 940 DEG C, finishing temperature
843℃；Enter water cooling, 710 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 51 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 910 DEG C, and hardening media is water；Tempering
Temperature is 190 DEG C, and temperature retention time is 325min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 2：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm（Steel billet）.
（2）Heating process：1240 DEG C of heating-up temperature, 1235 DEG C of soaking temperature, soaking zone insulation 69min, total heat time heating time
373 minutes.
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, start rolling temperature
1120 DEG C, the steel thickness that dries in the air is 140mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 910 DEG C, finishing temperature
For 841 DEG C；Enter water cooling, 680 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 49 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 910 DEG C, and hardening media is water；Tempering
Temperature is 185 DEG C, and temperature retention time is 352min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 3：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 300mm（Steel billet）.
（2）Heating process：1225 DEG C of heating-up temperature, 1222 DEG C of soaking temperature, soaking zone insulation 66min, total heat time heating time
353 minutes.
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, start rolling temperature
1120 DEG C, the steel thickness that dries in the air is 140mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 945 DEG C, finishing temperature
For 851 DEG C；Enter water cooling, 690 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 59 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 900 DEG C, and hardening media is water；Tempering
Temperature is 175 DEG C, and temperature retention time is 341min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 4：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 300mm（Steel billet）.
（2）Heating process：1230 DEG C of heating-up temperature, 1225 DEG C of soaking temperature, soaking zone insulation 89min, total heat time heating time
357 minutes.
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, start rolling temperature
1080 DEG C, the steel thickness that dries in the air is 150mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 930 DEG C, finishing temperature
For 837 DEG C；Enter water cooling, 700 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 51 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 910 DEG C, and hardening media is water；Tempering
Temperature is 180 DEG C, and temperature retention time is 304min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 5：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm（Steel billet）.
（2）Heating process：1230 DEG C of heating-up temperature, 1220 DEG C of soaking temperature, soaking zone insulation 68min, total heat time heating time
363 minutes.
（3）Rolling process：Using two-stage controlled rolling process；First stage be the austenite recrystallization stage, start rolling temperature
1150 DEG C, the steel thickness that dries in the air is 125mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 950 DEG C, finishing temperature
855℃；Enter water cooling, 750 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 53 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 915 DEG C, and hardening media is water；Tempering
Temperature is 180 DEG C, and temperature retention time is 240min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 60mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 6：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 300mm（Steel billet）.
（2）Heating process：1240 DEG C of heating-up temperature, 1240 DEG C of soaking temperature, soaking zone insulation 62min, total heat time heating time
360 minutes.
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, start rolling temperature
1100 DEG C, the steel thickness that dries in the air is 130mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 920 DEG C, finishing temperature
For 835 DEG C；Enter water cooling, 650 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 56 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 905 DEG C, and hardening media is water；Tempering
Temperature is 170 DEG C, and temperature retention time is 336min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Embodiment 7：This has the production technology of the NM500 slabs of excellent low temperature impact toughness as described below.
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed into carrying out refine simultaneously in LF refining furnace
Through application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm（Steel billet）.
（2）Heating process：1235 DEG C of heating-up temperature, 1230 DEG C of soaking temperature, soaking zone insulation 60min, total heat time heating time
380 minutes.
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, start rolling temperature
1050 DEG C, the steel thickness that dries in the air is 160mm, and second stage is the austenite non-recrystallization stage, and start rolling temperature is 900 DEG C, finishing temperature
For 830 DEG C；Enter water cooling, 670 DEG C of red temperature after rolling；Roll rear stacking slow cooling, 48 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；Hardening heat is 920 DEG C, and hardening media is water；Tempering
Temperature is 180 DEG C, and temperature retention time is 360min, air cooling of coming out of the stove, you can obtain described NM500 slabs.
The thickness of the present embodiment gained slab is 80mm, and as shown in table 1, mechanical property is as shown in table 2 for chemical composition.
Table 1：The chemical composition of each embodiment slab（wt%）
| Embodiment | C | Si | Mn | P | S | Cr | Mo | Ni | Al | B | Ti | Nb | V | ceq |
| 1 | 0.28 | 0.32 | 0.85 | 0.012 | 0.008 | 1.00 | 0.32 | 0.76 | 0.041 | 0.0012 | 0.013 | 0.039 | 0.045 | 0.745 |
| 2 | 0.30 | 0.31 | 0.74 | 0.011 | 0.005 | 0.77 | 0.31 | 0.69 | 0.029 | 0.0011 | 0.015 | 0.028 | 0.033 | 0.732 |
| 3 | 0.29 | 0.28 | 0.65 | 0.008 | 0.004 | 0.81 | 0.29 | 0.63 | 0.038 | 0.0016 | 0.011 | 0.033 | 0.031 | 0.715 |
| 4 | 0.27 | 0.29 | 0.67 | 0.012 | 0.010 | 0.80 | 0.50 | 0.80 | 0.033 | 0.0015 | 0.012 | 0.031 | 0.029 | 0.701 |
| 5 | 0.31 | 0.43 | 0.71 | 0.015 | 0.007 | 1.12 | 0.24 | 0.73 | 0.020 | 0.002 | 0.018 | 0.026 | 0.050 | 0.759 |
| 6 | 0.09 | 0.36 | 1.60 | 0.009 | 0.009 | 1.29 | 0.36 | 0.92 | 0.050 | 0.0012 | 0.014 | 0.050 | 0.039 | 0.756 |
| 7 | 0.15 | 0.50 | 0.91 | 0.010 | 0.006 | 1.50 | 0.43 | 1.00 | 0.036 | 0.0013 | 0.020 | 0.042 | 0.026 | 0.760 |
In table 1, the balance of Fe and inevitable impurity of chemical composition.
Table 2：The mechanical property of each embodiment slab
The NM500 Plate properties produced by this method are can be seen that by the mechanical properties test result of table 2 preferably, -40 DEG C
Ballistic work >=28J.
Claims (9)
1. a kind of NM500 slabs with excellent low temperature impact toughness, it is characterised in that its by following weight percentage into
Divide and constitute：C≤0.31%, Si≤0.50%, Mn≤1.60%, P≤0.015%, S≤0.010%, Cr≤1.50%, Mo≤0.50%,
Ni≤1.00%, 0.020%≤Al≤0.050%, B≤0.002%, Ti≤0.020, Nb≤0.05%, V≤0.05%, balance of Fe
With inevitable impurity.
2. NM500 slabs with excellent low temperature impact toughness according to claim 1, it is characterised in that：The slab-
40 DEG C of impact of collision work(>=20 joule.
3. NM500 slabs with excellent low temperature impact toughness according to claim 1, it is characterised in that：The slab
Maximum gauge be 80mm.
4. a kind of production method of the NM500 slabs with excellent low temperature impact toughness, it is characterised in that：It includes heating, rolls
Operation processed and heat treatment step；The slab is made up of the composition of following weight percentage：C≤0.31%, Si≤0.50%, Mn
≤ 1.60%, P≤0.015%, S≤0.010%, Cr≤1.50%, Mo≤0.50%, Ni≤1.00%, 0.020%≤Al≤0.050%,
B≤0.002%, Ti≤0.020, Nb≤0.05%, V≤0.05%, balance of Fe and inevitable impurity.
5. the production method of the NM500 slabs with excellent low temperature impact toughness according to claim 4, its feature exists
In the heating process：Heating-up temperature≤1240 DEG C, 1220 DEG C～1240 DEG C of soaking temperature, soaking zone insulation >=60min, always
Heat time heating time >=11min/cm steel billet thickness.
6. the production method of the NM500 slabs with excellent low temperature impact toughness according to claim 4, its feature exists
In the rolling process：1050 DEG C～1150 DEG C of first stage start rolling temperature, the steel thickness that dries in the air is H+50mm, and wherein H is that finished product is thick
Plate thickness；Second stage start rolling temperature≤950 DEG C, finishing temperature >=830 DEG C, it is cold to enter water control after rolling, 650 DEG C of red temperature～
750℃。
7. the production method of the NM500 slabs with excellent low temperature impact toughness according to claim 6, its feature exists
In：In the rolling process, roll rear stacking slow cooling, 48 hours stacking time and more than.
8. the producer of the NM500 slabs with excellent low temperature impact toughness according to claim 4-7 any one
Method, it is characterised in that：The heat treatment step adopts quenching+lonneal technique.
9. the production method of the NM500 slabs with excellent low temperature impact toughness according to claim 8, its feature exists
In the heat treatment step：Hardening heat is 910 DEG C ± 10 DEG C；Temperature is 180 DEG C ± 10 DEG C, and temperature retention time is (3.8
～4.5) × t minutes, t is slab mm of thickness；Air cooling after insulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960894.8A CN106566993A (en) | 2016-11-04 | 2016-11-04 | NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960894.8A CN106566993A (en) | 2016-11-04 | 2016-11-04 | NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate |
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| CN107217202A (en) * | 2017-07-19 | 2017-09-29 | 武汉钢铁有限公司 | The abrasion-resistant stee and its manufacture method of a kind of 500 grades of Brinell hardness |
| CN108085617A (en) * | 2017-12-14 | 2018-05-29 | 天津中德应用技术大学 | Environmentally friendly mold P20 steel and its production method |
| CN108251748A (en) * | 2018-03-28 | 2018-07-06 | 舞阳钢铁有限责任公司 | A kind of low-carbon-equivalent Nuclear containment steel plate and its production method |
| CN109468529A (en) * | 2018-10-12 | 2019-03-15 | 舞阳钢铁有限责任公司 | A kind of no nickel ultra-high strength steel plate and its production method |
| CN110643883A (en) * | 2019-10-10 | 2020-01-03 | 南京钢铁股份有限公司 | Production method of one-steel multi-stage wear-resistant steel blank |
| CN111041177A (en) * | 2019-12-11 | 2020-04-21 | 舞阳钢铁有限责任公司 | Production method of quenched and tempered 35CrMo die steel plate |
| CN112375978A (en) * | 2020-10-30 | 2021-02-19 | 舞阳钢铁有限责任公司 | Steel for construction and production method thereof |
| CN114134389A (en) * | 2021-11-24 | 2022-03-04 | 山东钢铁集团日照有限公司 | High-strength steel plate with yield strength of 890MPa and manufacturing method thereof |
| CN114774778A (en) * | 2022-03-29 | 2022-07-22 | 河北普阳钢铁有限公司 | Low-carbon equivalent NM500 and production method thereof |
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| CN111041177A (en) * | 2019-12-11 | 2020-04-21 | 舞阳钢铁有限责任公司 | Production method of quenched and tempered 35CrMo die steel plate |
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| CN114134389A (en) * | 2021-11-24 | 2022-03-04 | 山东钢铁集团日照有限公司 | High-strength steel plate with yield strength of 890MPa and manufacturing method thereof |
| CN114774778A (en) * | 2022-03-29 | 2022-07-22 | 河北普阳钢铁有限公司 | Low-carbon equivalent NM500 and production method thereof |
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