CN103643141A - High-hardness alloy steel material for pump valves and preparation method thereof - Google Patents
High-hardness alloy steel material for pump valves and preparation method thereof Download PDFInfo
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- CN103643141A CN103643141A CN201310558326.1A CN201310558326A CN103643141A CN 103643141 A CN103643141 A CN 103643141A CN 201310558326 A CN201310558326 A CN 201310558326A CN 103643141 A CN103643141 A CN 103643141A
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- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 title abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000007670 refining Methods 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 15
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 7
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011777 magnesium Substances 0.000 claims abstract description 7
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000011733 molybdenum Substances 0.000 claims abstract description 4
- 238000010792 warming Methods 0.000 claims description 18
- 238000005275 alloying Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910000805 Pig iron Inorganic materials 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229910021532 Calcite Inorganic materials 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- NPUJHQNGUMWIMV-UHFFFAOYSA-L dicalcium pentamagnesium [dioxido-[oxo(trioxidosilyloxy)silyl]oxysilyl]oxy-[[dioxido-[oxo(trioxidosilyloxy)silyl]oxysilyl]oxy-oxosilyl]oxy-dioxidosilane dihydroxide Chemical compound [OH-].[OH-].[Mg++].[Mg++].[Mg++].[Mg++].[Mg++].[Ca++].[Ca++].[O-][Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])O[Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])[O-] NPUJHQNGUMWIMV-UHFFFAOYSA-L 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 239000010977 jade Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229910000077 silane Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229960001763 zinc sulfate Drugs 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
A high-hardness alloy steel material for pump valves comprises the following chemical element components by mass percent: 0.9-1.4% of carbon, 0.8-1.1% of silicon, 2.1-2.4% of manganese, 0.6-0.8% of chromium, 0.03-0.05% of vanadium, 0.12-0.14% of molybdenum, 0.01-0.02% of lanthanum, 2.1-2.3% of magnesium, 0.04-0.06% of W, 0.12-0.16% of Tm, not more than 0.04% of S, not more than 0.04% of P, and the balance of iron. The low alloy steel provided by the invention not only has high hardness, but also has good toughness, good wear resistance, high thermal strength, low dynamic load gap sensitivity, and high fatigue strength, and also is good in casting performance, and high in casting yield. The method of the invention partly adopts scrap iron as a raw material; secondary refining is performed; heat treatment temperature after casting is controlled reasonably; raw materials are fed in batches; and thus the alloy is provided with more stable and uniform quality, and improved comprehensive mechanical properties.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to high hardness alloy steel and preparation method thereof for a kind of pump valve.
Background technology
The environment of pump valve work is various, badly, very high to the requirement of material, the steel alloy that pump valve is used at present has varied, technology has very much progress, but still have a lot of problems to exist, as wear resistance, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness etc., in a lot of occasions, can't meet the requirement of production, also require further improvement, to enhance productivity, reduce costs, improve security, for high-quality precision and sophisticated technology development provides safeguard, for social development provides power, task is also very arduous.
Summary of the invention
The object of the present invention is to provide high hardness alloy steel and preparation method thereof for a kind of pump valve, this alloy material has advantages of high rigidity, shock-resistant, wear-resisting, hardening capacity is good.
Technical scheme of the present invention is as follows:
A pump valve high hardness alloy steel, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.4, silicon 0.8-1.1, manganese 2.1-2.4, chromium 0.6-0.8, vanadium 0.03-0.05, molybdenum 0.12-0.14, lanthanum 0.01-0.02, magnesium 2.1-2.3, W0.04-0.06, Tm0.12-0.16, S≤0.04, P≤0.04, surplus are iron.
The production method of high hardness alloy steel for described pump valve, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-4 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, magnesium; (2) chromium, vanadium, lanthanum; (3) other remaining components; The timed interval that each batch drops into element is 24-27 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 220-240 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 220-240 ℃/h of speed, be warming up to 700-710 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 920-940 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 220-240 ℃/h of speed, then be cooled to 480-500 ℃ with 150-160 ℃/h of speed, insulation 70-80 minute; With 150-160 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 220-240 ℃/h of speed, be warming up to 330-350 ℃ again, then be cooled to 200-210 ℃ with 150-160 ℃/h of speed, then be warming up to 530-550 ℃ with 180-190 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 30-34, aluminium hydroxide 2-3, calcite 4-5, zinc sulfate 1-2, medical stone 1-2, montmorillonite 1-2, jade 2-3, Tremoliteor Tremoliteasbestos 3-4, Calcium Fluoride (Fluorspan) 1-2, Sodium Silicofluoride 4-5; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.
Beneficial effect of the present invention
Steel alloy provided by the invention not only has high hardness, but also has good toughness, wear resisting property is good, heat strong high, moving load notch sensitivity is little, also has higher fatigue strength; And good casting property, casting yield is high.The present invention uses part scrap iron as raw material, and through secondary refining, rationally controls casting postheat treatment temperature, and throwing raw materials, makes more stable uniform of alloy quality in batches, improves comprehensive mechanical property.Steel alloy of the present invention is applicable to the high parts of wear rate such as pump shaft, bearing, pump case, and not fragile, cost is low.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.
Embodiment
A pump valve high hardness alloy steel, chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.4, silicon 0.8-1.1, manganese 2.1-2.4, chromium 0.6-0.8, vanadium 0.03-0.05, molybdenum 0.12-0.14, lanthanum 0.01-0.02, magnesium 2.1-2.3, W0.04-0.06, Tm0.12-0.16, S≤0.04, P≤0.04, surplus are iron.
Described pump valve by the production method of high hardness alloy steel is:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:3 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, magnesium; (2) chromium, vanadium, lanthanum; (3) other remaining components; The timed interval that each batch drops into element is 25 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 230 ℃/h of speed, be warming up to 505 ℃, be incubated 65 minutes, then be warming up to 705 ℃ with 230 ℃/h of speed, be incubated 65 minutes, then be warming up to 930 ℃ with 175 ℃/h of speed, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 705 ℃ with 230 ℃/h of speed, then be cooled to 490 ℃ with 155 ℃/h of speed, be incubated 75 minutes; With 155 ℃/h of speed, be cooled to 225 ℃ again, be incubated 2.5 hours; With 230 ℃/h of speed, be warming up to 340 ℃ again, then be cooled to 205 ℃ with 155 ℃/h of speed, then be warming up to 530-550 ℃ with 185 ℃/h of speed, be incubated 2.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 32, aluminium hydroxide 2.5, calcite 4.5, zinc sulfate 1.5, medical stone 1.5, montmorillonite 1.5, jade 2.6, Tremoliteor Tremoliteasbestos 3.5, Calcium Fluoride (Fluorspan) 1.5, Sodium Silicofluoride 4.5; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 150 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2.4%, 1.5% nano-carbon powder, after mixing, under 12Mpa, be pressed into base, then, at 930 ℃, calcine 3.5 hours, cooling after, then be ground into 200 order powder, obtain.
Pump valve of the present invention by the mechanical property of high hardness alloy steel is: tensile strength 1376MPa, yield strength 973MPa, unit elongation 12.5%, relative reduction in area 22%, impact absorbing energy 49J, impelling strength 60J/cm2, hardness 295HB.
Claims (4)
1. a pump valve high hardness alloy steel, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.4, silicon 0.8-1.1, manganese 2.1-2.4, chromium 0.6-0.8, vanadium 0.03-0.05, molybdenum 0.12-0.14, lanthanum 0.01-0.02, magnesium 2.1-2.3, W0.04-0.06, Tm0.12-0.16, S≤0.04, P≤0.04, surplus are iron.
2. the production method of high hardness alloy steel for pump valve according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-4 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, magnesium; (2) chromium, vanadium, lanthanum; (3) other remaining components; The timed interval that each batch drops into element is 24-27 minute, after feeding intake, stirs.
3. the production method of high hardness alloy steel for pump valve according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 220-240 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 220-240 ℃/h of speed, be warming up to 700-710 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 920-940 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 220-240 ℃/h of speed, then be cooled to 480-500 ℃ with 150-160 ℃/h of speed, insulation 70-80 minute; With 150-160 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 220-240 ℃/h of speed, be warming up to 330-350 ℃ again, then be cooled to 200-210 ℃ with 150-160 ℃/h of speed, then be warming up to 530-550 ℃ with 180-190 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of high hardness alloy steel for pump valve according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 30-34, aluminium hydroxide 2-3, calcite 4-5, zinc sulfate 1-2, medical stone 1-2, montmorillonite 1-2, jade 2-3, Tremoliteor Tremoliteasbestos 3-4, Calcium Fluoride (Fluorspan) 1-2, Sodium Silicofluoride 4-5; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558326.1A CN103643141A (en) | 2013-11-12 | 2013-11-12 | High-hardness alloy steel material for pump valves and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558326.1A CN103643141A (en) | 2013-11-12 | 2013-11-12 | High-hardness alloy steel material for pump valves and preparation method thereof |
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| CN103643141A true CN103643141A (en) | 2014-03-19 |
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| CN201310558326.1A Pending CN103643141A (en) | 2013-11-12 | 2013-11-12 | High-hardness alloy steel material for pump valves and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908083A (en) * | 2016-05-31 | 2016-08-31 | 安徽潜山轴承制造有限公司 | High hardness bearing steel and smelting process thereof |
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| JP2002146483A (en) * | 2000-11-09 | 2002-05-22 | Nippon Steel Corp | High strength austenitic stainless steel wire |
| CN1768155A (en) * | 2003-03-28 | 2006-05-03 | 株式会社神户制钢所 | Steel wire for high-strength springs and high-strength springs with excellent workability |
| CN1940112A (en) * | 2005-09-30 | 2007-04-04 | 宝山钢铁股份有限公司 | Low-alloy and superhigh carbon composite phase steel and its manufacture |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Manufacturing process of alloy steel for rail frog |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | A steel-making refining agent containing modified montmorillonite powder and its preparation method |
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2013
- 2013-11-12 CN CN201310558326.1A patent/CN103643141A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002146483A (en) * | 2000-11-09 | 2002-05-22 | Nippon Steel Corp | High strength austenitic stainless steel wire |
| CN1768155A (en) * | 2003-03-28 | 2006-05-03 | 株式会社神户制钢所 | Steel wire for high-strength springs and high-strength springs with excellent workability |
| CN1940112A (en) * | 2005-09-30 | 2007-04-04 | 宝山钢铁股份有限公司 | Low-alloy and superhigh carbon composite phase steel and its manufacture |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Manufacturing process of alloy steel for rail frog |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | A steel-making refining agent containing modified montmorillonite powder and its preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105908083A (en) * | 2016-05-31 | 2016-08-31 | 安徽潜山轴承制造有限公司 | High hardness bearing steel and smelting process thereof |
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