CN105239014A - Low-cost high-carbon medium-magnesium abrasion resisting steel and manufacturing method of hot rolled plate of low-cost high-carbon medium-magnesium abrasion resisting steel - Google Patents
Low-cost high-carbon medium-magnesium abrasion resisting steel and manufacturing method of hot rolled plate of low-cost high-carbon medium-magnesium abrasion resisting steel Download PDFInfo
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- CN105239014A CN105239014A CN201510708407.4A CN201510708407A CN105239014A CN 105239014 A CN105239014 A CN 105239014A CN 201510708407 A CN201510708407 A CN 201510708407A CN 105239014 A CN105239014 A CN 105239014A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000005299 abrasion Methods 0.000 title abstract 8
- 229910052749 magnesium Inorganic materials 0.000 title abstract 8
- 239000011777 magnesium Substances 0.000 title abstract 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims abstract description 3
- 239000011572 manganese Substances 0.000 claims description 24
- 229910052748 manganese Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 13
- 239000006104 solid solution Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 5
- 229910052758 niobium Inorganic materials 0.000 abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
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- 235000015170 shellfish Nutrition 0.000 description 1
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- 230000004580 weight loss Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention creatively provides low-cost high-carbon medium-magnesium abrasion resisting steel and a manufacturing method of a hot rolled plate of the low-cost high-carbon medium-magnesium abrasion resisting steel. The high-carbon medium-magnesium abrasion resisting steel comprises, by weight percentage, 0.7-0.9% of C, 0-0.6% of Si, 7.0-9.0% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.02% of S, 2.0-3.0% of Cr, 0.03-0.08% of Al, and the balance Fe and inevitable impurities. The manufacturing method of the hot rolled plate with the high-carbon medium-magnesium abrasion resisting steel as the raw material comprises the technologies of burdening, smelting, continuous casting, heating, hot rolling and solid dissolving. According to the involved high-carbon medium-magnesium abrasion resisting steel, the reasonable proportion of Cr and Al is adopted, Mo or Ni or V or Nb or other expensive metal materials are not added, and the beneficial effects of high strength, good plasticity and toughness, large tensile strength and the like are achieved on the premise that the raw material cost is saved. The hot rolled plate with the high-carbon medium-magnesium abrasion resisting steel as the raw materials has the obvious market price advantage.
Description
Technical field
The invention belongs to high-carbon medium manganese steel hot rolling technique field, particularly manganese wear-resistant steel and hot rolled plate making process thereof in a kind of high-carbon.
Background technology
Wear resisting steel is the class high-abrasive material being widely used in various wear working condition, over more than 100 year, wear resisting steel steel grade emerges in an endless stream, and it is smelted, casting, thermal treatment and process for machining are updated, comprehensive mechanical property, the wear resisting property of wear resisting steel and progressively improve work-ing life.Wear resisting steel is widely used in the every field such as metallurgy, mine, building materials, electric power, railway and military affairs, and Focusing on components comprises excavator bucket teeth, ball grinding machine lining board, crusher jaw, crushing wall, rolled mortar wall, tractor shoe and railway switch etc.
Applying more wear resisting steel is high mangaenese steel and middle-low alloy steel.The high mangaenese steel of austenite structure found in 1882, and within 1883, British Ahmedabad Field achieves high mangaenese steel patent.High mangaenese steel is under high shock load, and cold deformation occurs on surface, and work hardening occurs; In addition, easily occur stacking fault during deformation, for the generation of ε-martensitic formation and mechanical twin creates condition, ε-martensite and mechanical twin make steel be difficult to distortion, and therefore, under high shock load, the surface of high mangaenese steel obtains the sclerosis of very high level.Under high impact loads, the schedule of reinforcement of high mangaenese steel is: γ → fault → ε-M → α-M.In, under low load, in austenite, only produce fault, can not generate martensite and mechanical twin, therefore its case depth is shallow, can not give full play to work hardening ability and make wear resistance not enough.
Another kind of is quenching and tempering type middle-low alloy steel, and its microstructure is martensite or horse-bainite heterogeneous structure.Because the hardening capacity of middle-low alloy steel is not good, wear resistance is obviously decayed to heart portion by top layer, and is having under impact, tired operating mode, and its result of use is undesirable.Especially under mine and coal mining complex working condition, along with power impact, soft/hard abrasive grain, acid and alkali corrosion, the use properties of the wear resisting steel of middle low-alloy horse shellfish phase transformation strengthening type cannot meet working condition completely.
Medium Manganese Steel grows up on the basis of high mangaenese steel, reduces austenitic stability by adjustment Mn constituent content, make its in just can there is austenite to martensitic transformation under low shock load, thus raising wear resistance.With regard to prior art, domestic patent " a kind of austenite abrasion-proof steel and hot rolled plate making process thereof with shock-resistant polishing machine " (publication number CN104451405A) discloses a kind of shock-resistant polishing machine austenitic steel, it is by adjustment C, Mn constituent content and microalloying, improve wear resisting steel in, hardenability value under low load, but add the expensive metallic element such as Mo, V, Nb, B in wear resisting steel, the production cost of wear resisting steel will inevitably be increased.
Domestic patent " a kind of obdurability wear-resisting Medium Manganese Steel hot-rolled sheet and manufacture method thereof " (publication number CN104694829A) discloses the wear-resisting Medium Manganese Steel of a kind of obdurability, it improves the parameters index of wear resisting steel by adjustment C, Mn constituent content and microalloying, although with the addition of Cr and Al element, but proportioning is not optimized, need equally to add the expensive metal elements such as Mo, V, Nb, B, add the production cost of wear resisting steel.
Summary of the invention
The problem that the invention will solve is, provides the making method of manganese wear-resistant steel and hot-rolled sheet thereof in a kind of low cost high-carbon, solves the problem that the production cost that exists in existing Medium Manganese Steel and goods thereof is high.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is:
There is provided manganese wear-resistant steel in a kind of low cost high-carbon, its chemical component weight per-cent is: C:0.7-0.9%, Si:0-0.6%, Mn:7.0-9.0%, P≤0.02%, S≤0.02%, Cr:2.0-3.0%, Al:0.03-0.08%, all the other are Fe and inevitable impurity.
Further, the weight percent of described C is: 0.71-0.89%.
Further, the weight percent of described Si is: 0.02-0.59%.
Further, the weight percent of described Mn is: 7.02-8.99%.
Further, the weight percent of described Cr is: 2.02-2.98%.
Further, the hot-rolled sheet making method of manganese wear-resistant steel in low cost high-carbon: technical process comprises: batching, melting, continuous casting, heating, hot rolling and solid solution, in described casting process, continuous casting pouring temperature 1440-1460 DEG C, obtains billet; In described heat-processed, billet holding temperature is 1150-1200 DEG C; In described course of hot rolling, billet rolling temperature is 1000-1150 DEG C; In described solid solution process, solid solubility temperature >=1050 DEG C, speed of cooling 10-60 DEG C/S, temperature < 200 DEG C after the water outlet of control surface of steel plate.
Further, the tensile strength of described wear resisting steel hot-rolled sheet is 630-680MPa, and yield strength is 390-410MPa; Described wear resisting steel hot-rolled sheet opens v-notch impact absorbing energy: 25 DEG C of Impact energy Ak v >=70J, and-40 DEG C of Impact energy Ak v are 30-40J; The Brinell hardness of described wear resisting steel hot-rolled sheet is 210-230HB.
Further, described wear resisting steel hot-rolled sheet under 200N load skimming wear condition, its wear rate≤30 × 10
-6mm
3/ Nm.
The mechanism of action of chemical composition in the present invention:
C:C is topmost alloying element in steel, increase C content can improve the intensity of material and strain-hardening after hardness, C has higher solubleness in austenite, can increase austenitic formation probability, along with the increase of C content, solidity to corrosion and the toughness of steel decrease.
Mn:Mn passes through the critical cooling rate reducing steel in steel, improve austenitic stability, thus the steel under making room temperature retains a large amount of austenite structures, be cheap austenite stable element and reinforced alloys element, easily form crackle during Mn too high levels, produce thick column crystal.
Si:Si is ferrite former, can improve intensity and the hardness of steel, can also improve castability and the antioxidant property of steel, improves hardening capacity and resistance to tempering, is conducive to the comprehensive mechanical property improving steel.But Si also can reduce the plasticity and toughness of steel simultaneously.
Cr:Cr can ensure the corrosion resistance nature of steel, effectively can also slow down the speed of austenite to ferrite and Carbides Transformation, CCT curve be moved to right, and reduces the critical cooling velocity of steel, thus increase the hardening capacity of steel.Cr and C can form multiple carbide, plays the effect of solution strengthening.
Al:Al can as the reductor of molten steel, can crystal grain thinning, improves impelling strength, oxidation-resistance and erosion resistance.Al and Cr adopts rational proportion can significantly improve high temperature non-scale performance and the high-temperature corrosion resistance ability of steel, affects the hot workability of steel, welding property and machinability.
Mo, Ni, V, Nb:Mo and Ni can expand austenite phase field, ensure to obtain austenite structure in room temperature texture; V, Nb can crystal grain thinnings, improve intensity and the toughness of steel.But in steel, add the cost that these precious metal elements can increase material undoubtedly.
The present invention, by suitable raising Cr and Al element addition, ensures intensity and the toughness of austenite structure under room temperature and wear resisting steel, thus need not add precious metal element again.The present invention's wear-resistant steel material cost per ton significantly reduces than the wear-resistant steel material adding precious metal, but material indices performance does not reduce, by reasonable component design, hot rolling technology and solution treatment can ensure wear resisting steel meet in various complex working condition requirement under low shock load condition.
Embodiment
In order to better the present invention is described, set forth content of the present invention further below in conjunction with embodiment:
1, choose six groups of different components weight percent (%) proportioning raw materials, the concrete proportioning of each group component is as shown in table 1:
The weight percentages of components (%) of table 1 embodiment
| Embodiment | C | Si | Mn | P | S | Cr | Al |
| 1 | 0.71 | 0.02 | 8.99 | 0.016 | 0.013 | 2.02 | 0.039 |
| 2 | 0.72 | 0.34 | 8.47 | 0.017 | 0.016 | 2.65 | 0.043 |
| 3 | 0.74 | 0.27 | 8.23 | 0.015 | 0.012 | 2.24 | 0.034 |
| 4 | 0.78 | 0.38 | 7.83 | 0.016 | 0.014 | 2.49 | 0.078 |
| 5 | 0.83 | 0.59 | 7.46 | 0.019 | 0.016 | 2.18 | 0.036 |
| 6 | 0.89 | 0.24 | 7.02 | 0.017 | 0.019 | 2.98 | 0.032 |
2, carry out processes to six groups of embodiment samples, technical process is: melting-continuous casting-heating-hot rolling-solid solution, and the art breading parameter often organizing embodiment sample corresponding is as shown in table 2:
The art breading parameter of table 2 embodiment
3, the hot-rolled sheet mechanical property that finally formed of six groups of embodiments is as shown in table 3
The hot-rolled sheet mechanical property of table 3 embodiment
As can be seen from Table 3, in 6 embodiments, tensile strength is 630-680MPa, yield strength is 390-410MPa, open v-notch impact absorbing energy: 25 DEG C of Impact energy Ak v >=70J,-40 DEG C of Impact energy Ak v are 30-40J, Brinell hardness is 210-230HB, and wherein the over-all properties of embodiment 4 and 5 is higher.4, friction and wear behavior test
Friction-wear test is carried out on M2000 friction wear testing machine, load 200N, rotating speed 200 revs/min, wearing-in period 2 hours, and select 80-120 order quartz sand as abrasive material, friction pair is GCr15 steel loop, diameter 40mm.Wear rate formula is as follows: KV=△ m/ ρ PL.
Wherein KV is Volume erosion rate, and unit is mm3/Nm; △ m is wear weight loss, unit mg; ρ is experiment material density, and unit is g/cm3; P is on-load pressure, and unit is N; L is wearing and tearing stroke, and unit is m.
The friction and wear behavior test result of six groups of embodiments is as shown in table 4:
The polishing machine of table 4 embodiment
As can be seen from Table 4, the rub resistance wearability of the invention 6 embodiments brings up to HARDOX450 respectively, and (HARDOX450 is the wear-resisting steel plate of Brinell hardness 450HB, there is good clod wash, be mainly used in operating mode of resistance to wearing) and more than 1.37 times and 1.53 times of Mn13.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.
Claims (8)
1. a manganese wear-resistant steel in low cost high-carbon, is characterized in that: chemical component weight per-cent is: C:0.7-0.9%, Si:0-0.6%, Mn:7.0-9.0%, P≤0.02%, S≤0.02%, Cr:2.0-3.0%, Al:0.03-0.08%, all the other are Fe and inevitable impurity.
2. manganese wear-resistant steel in low cost high-carbon according to claim 1, is characterized in that: the weight percent of described C is: 0.71-0.89%.
3. manganese wear-resistant steel in low cost high-carbon according to claim 1, is characterized in that: the weight percent of described Si is: 0.02-0.59%.
4. manganese wear-resistant steel in low cost high-carbon according to claim 1, is characterized in that: the weight percent of described Mn is: 7.02-8.99%.
5. manganese wear-resistant steel in low cost high-carbon according to claim 1, is characterized in that: the weight percent of described Cr is: 2.02-2.98%.
6. the hot-rolled sheet making method of manganese wear-resistant steel in low cost high-carbon according to claim 1: technical process comprises: batching, melting, continuous casting, heating, hot rolling and a solid solution, is characterized in that:
In described casting process, continuous casting pouring temperature 1440-1460 DEG C, obtains billet;
In described heat-processed, slab holding temperature is 1150-1200 DEG C;
In described course of hot rolling, slab rolling temperature is 1000-1150 DEG C;
In described solid solution process, solid solubility temperature >=1050 DEG C, speed of cooling 10-60 DEG C/S, temperature < 200 DEG C after the water outlet of control surface of steel plate.
7. manganese wear-resistant steel hot-rolled sheet in the low cost high-carbon that is made of making method according to claim 6, is characterized in that: the tensile strength of described wear resisting steel hot-rolled sheet is 630-680MPa, and yield strength is 390-410MPa; Described wear resisting steel hot-rolled sheet opens v-notch impact absorbing energy: 25 DEG C of Impact energy Ak v >=70J, and-40 DEG C of Impact energy Ak v are 30-40J; The Brinell hardness of described wear resisting steel hot-rolled sheet is 210-230HB.
8. manganese wear-resistant steel hot-rolled sheet in the low cost high-carbon that is made of making method according to claim 6, is characterized in that: described wear resisting steel hot-rolled sheet under 200N load skimming wear condition, wear rate≤30 × 10
-6mm
3/ Nm.
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| CN201510708407.4A CN105239014A (en) | 2015-10-27 | 2015-10-27 | Low-cost high-carbon medium-magnesium abrasion resisting steel and manufacturing method of hot rolled plate of low-cost high-carbon medium-magnesium abrasion resisting steel |
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| CN201510708407.4A CN105239014A (en) | 2015-10-27 | 2015-10-27 | Low-cost high-carbon medium-magnesium abrasion resisting steel and manufacturing method of hot rolled plate of low-cost high-carbon medium-magnesium abrasion resisting steel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893931A (en) * | 2017-03-04 | 2017-06-27 | 蒋培丽 | A kind of granule enhancement type austenitic steel and its steel plate manufacturing process |
| CN108034890A (en) * | 2017-12-13 | 2018-05-15 | 天津市宝月钢制品有限公司 | Manganese wear-resistant steel hot rolled plate and preparation method in low-alloy |
| CN108504959A (en) * | 2018-06-04 | 2018-09-07 | 福州大学 | A kind of Austenitic Medium Manganese Steel and preparation method thereof of composite alloying processing |
| CN109112414A (en) * | 2018-10-23 | 2019-01-01 | 天津威尔朗科技有限公司 | Manganese wear-resistant hot rolling seamless steel pipe and its production method in a kind of austenite |
| CN109402502A (en) * | 2018-10-23 | 2019-03-01 | 天津威尔朗科技有限公司 | A kind of wear resistant corrosion resistant medium managese steel hot rolled steel plate and preparation method thereof |
| CN109825771A (en) * | 2019-04-01 | 2019-05-31 | 天津威尔朗科技有限公司 | A kind of novel middle manganese wear-resistant steel plate |
| CN109943780A (en) * | 2019-04-29 | 2019-06-28 | 东北大学 | Manganese wear-resistant steel and preparation method thereof in a kind of high-carbon |
| CN110205461A (en) * | 2019-07-04 | 2019-09-06 | 山西太钢不锈钢股份有限公司 | A kind of manufacturing method of the high manganese wear-resistant steel plate of high-carbon |
| CN113444985A (en) * | 2021-05-24 | 2021-09-28 | 北京中永业科技有限公司 | Steel material and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893931A (en) * | 2017-03-04 | 2017-06-27 | 蒋培丽 | A kind of granule enhancement type austenitic steel and its steel plate manufacturing process |
| CN108034890A (en) * | 2017-12-13 | 2018-05-15 | 天津市宝月钢制品有限公司 | Manganese wear-resistant steel hot rolled plate and preparation method in low-alloy |
| CN108504959A (en) * | 2018-06-04 | 2018-09-07 | 福州大学 | A kind of Austenitic Medium Manganese Steel and preparation method thereof of composite alloying processing |
| CN108504959B (en) * | 2018-06-04 | 2019-11-12 | 福州大学 | A kind of austenitic medium manganese steel treated by composite alloying and preparation method thereof |
| CN109112414A (en) * | 2018-10-23 | 2019-01-01 | 天津威尔朗科技有限公司 | Manganese wear-resistant hot rolling seamless steel pipe and its production method in a kind of austenite |
| CN109402502A (en) * | 2018-10-23 | 2019-03-01 | 天津威尔朗科技有限公司 | A kind of wear resistant corrosion resistant medium managese steel hot rolled steel plate and preparation method thereof |
| CN109825771A (en) * | 2019-04-01 | 2019-05-31 | 天津威尔朗科技有限公司 | A kind of novel middle manganese wear-resistant steel plate |
| CN109825771B (en) * | 2019-04-01 | 2021-04-16 | 天津威尔朗科技有限公司 | Medium-manganese wear-resistant steel plate |
| CN109943780A (en) * | 2019-04-29 | 2019-06-28 | 东北大学 | Manganese wear-resistant steel and preparation method thereof in a kind of high-carbon |
| CN110205461A (en) * | 2019-07-04 | 2019-09-06 | 山西太钢不锈钢股份有限公司 | A kind of manufacturing method of the high manganese wear-resistant steel plate of high-carbon |
| CN113444985A (en) * | 2021-05-24 | 2021-09-28 | 北京中永业科技有限公司 | Steel material and preparation method thereof |
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Application publication date: 20160113 |