CN103436766B - A kind of preparation method of nickel-chrome alloy steel - Google Patents
A kind of preparation method of nickel-chrome alloy steel Download PDFInfo
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- CN103436766B CN103436766B CN201310295536.6A CN201310295536A CN103436766B CN 103436766 B CN103436766 B CN 103436766B CN 201310295536 A CN201310295536 A CN 201310295536A CN 103436766 B CN103436766 B CN 103436766B
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Abstract
The invention discloses a kind of preparation method of nickel-chrome alloy steel, include following operation steps, 1), will dehydration pre-treatment be carried out containing iron ore material and sinter in agglomerate, the described iron ore material that contains is by weight percentage by the limonite of 20 ~ 40%, the rhombohedral iron ore of 30 ~ 50%, and surplus is red soil nickel ore composition; 2), agglomerate is obtained molten iron through blast-furnace smelting, 1.0 ~ 2.0% compound modifiers of weight of molten iron are placed in bottom casting ladle, with pouring method in bag, compound modification treatment is carried out to molten iron, temperature of reaction is 1400 ~ 1500 DEG C, and the chemical component weight per-cent of described compound modifier is: FeNB5050 ~ 55%, FeSiRe2120 ~ 25%, FeBa5Si6020 ~ 25%, Yttrium base rare earth 5 ~ 10%; The present invention overcomes the defect that existing low-grade laterite nickel ore can not get fully utilizing, steel alloy it possess high strength, the performance such as anticorrosive, weather-proof, there is good economic benefit.
Description
Technical field
The present invention relates to steel alloy field of smelting, be specifically related to a kind of Midst-and-low alloy steel containing nickel chromium triangle and preparation method thereof.
Background technology
At present, China's iron ore deposit gradually reduces, and iron and steel production capacity is significantly expanded, and the iron ore deposit major part of Iron and Steel Production relies on import, with high costs.Along with the quickening of urbanization process, the security of buildings more and more comes into one's own.The domestic existing building trade hot rolled ribbed steel bar adopting HRB335, HRB400 model more, but the intensity of these model reinforcing bars, Anti-seismic standard are well below the even higher reinforcing bar of the HRB500 abroad generally used.The domestic research about high strength cast iron mainly concentrates in the interpolation of trace element, as Chinese patent CN101717898A discloses a kind of HRB500E high-strength anti-seismic steel bar containing boron nitrogen microalloy; Chinese patent CN101696484A discloses a kind of HRB400 hot rolled ribbed steel bar containing vanadium, chromium.But need the content adding expensive alloy adjustment molten steel medium trace element in these technology, and iron ore price rises year by year, the manufacturing cost that result in whole reinforcing bar remains high.
Containing the valuable metal such as nickel, chromium in red soil nickel ore, wherein also containing a large amount of iron.At home, in recent years adopt pyrometallurgical smelting laterite nickel ore and producing ferronickel, the source of iron as steel-making starts to come into one's own.Low-grade and super low-grade nickel minerals a large amount of in red soil nickel ore, as nickeliferous less than 1.5%, iron content 30%-50%, the particularly low-grade laterite nickel ore of nickeliferous≤1%, iron content 45%-50%, wherein contained various elements also can not get comprehensive utilization at present.
Summary of the invention
The object of this invention is to provide a kind of preparation method of nickel-chrome alloy steel, overcome the defect that existing low-grade laterite nickel ore can not get fully utilizing, steel alloy it possess high strength, the performance such as anticorrosive, weather-proof, there is good economic benefit.
Technical scheme of the present invention is as follows:
A preparation method for nickel-chrome alloy steel, includes following operation steps,
1), will carry out dehydration pre-treatment containing iron ore material and sinter in agglomerate, the described iron ore material that contains be by weight percentage by the limonite of 20 ~ 40%, the rhombohedral iron ore of 30 ~ 50%, and surplus is red soil nickel ore composition;
2), agglomerate is obtained molten iron through blast-furnace smelting, 1.0 ~ 2.0% compound modifiers of weight of molten iron are placed in bottom casting ladle, with pouring method in bag, compound modification treatment is carried out to molten iron, temperature of reaction is 1400 ~ 1500 DEG C, and the chemical component weight per-cent of described compound modifier is: FeNB5050 ~ 55%, FeSiRe2120 ~ 25%, FeBa5Si6020 ~ 25%, Yttrium base rare earth 5 ~ 10%;
3), by described molten iron carry out refining by converter or electric furnace, and regulate chemical component weight percentage ratio composition in molten steel to meet as follows: C:0.2 ~ 0.35%; Si:0.3 ~ 0.6%; Mo:0.03 ~ 0.06%, Mn:0.8 ~ 1.2%; Ni:0.45 ~ 1.5%; Cr:0.05 ~ 0.8%; V:0.03 ~ 0.25%; P :≤0.02%; S :≤0.02%; Surplus is Fe;
4), the molten steel after refining is carried out casting and become alloy steel casting;
5), thermal treatment, a, annealing: alloy steel casting is placed in temperature lower than in the annealing furnace of 300 DEG C, is warmed up to 800 ± 10 DEG C, be incubated 60 ± 10 minutes, come out of the stove in temperature lower than when 400 DEG C, air cooling; B, quenching: alloy steel casting is placed in temperature lower than in the quenching furnance of 200 DEG C, is warmed up to 550 ± 10 DEG C, be incubated 60 ± 5 minutes, then continue to be warmed up to 800 ± 10 DEG C, be incubated 70 ± 5 minutes, with hardening liquid cooling, hardening liquid is 20-30%KCl, 10-20%NaNO by mass percent
3, 4-8%CaCl
2, 10-18%NaOH, excess water form; C, tempering: steel alloy is placed in temperature lower than in the tempering stove of 70 DEG C, is warmed up to 600 ± 10 DEG C, be incubated 120 ± 5 minutes, air cooling.
In described molten steel, chemical component weight percentage ratio composition meets as follows: C:0.28%; Si:0.4%; Mo:0.04%, Mn:1%; Ni:1.0%; Cr:0.35%; V:0.10%; P :≤0.02%; S :≤0.02%; Surplus is Fe.
Preparation method of the present invention, without the need to the alloy adding nickel or chromium special in preparation process, simplifies production technique.And, due to the increase of nickel, chromium element in steel alloy, the addition of manganese element can also be reduced, and significantly improve the performance of steel, make it possess high strength, the performance such as anticorrosive, weather-proof, there is good economic benefit, social benefit and application prospect.
Steel alloy prepared by the inventive method possesses performance index: yield strength YS is 780-800MPa, tensile strength TS is 1100-1220MPa, strong flexor ratio TS/YS is 1.2-1.4, unit elongation 18-21%, uniform elongation 7.8 ~ 10.0%, weather resistance is better than CortenA.
Embodiment
A preparation method for nickel-chrome alloy steel, includes following operation steps,
1), will carry out dehydration pre-treatment containing iron ore material and sinter in agglomerate, the described iron ore material that contains be by weight percentage by the limonite of 20 ~ 40%, the rhombohedral iron ore of 30 ~ 50%, and surplus is red soil nickel ore composition;
2), agglomerate is obtained molten iron through blast-furnace smelting, 1.0 ~ 2.0% compound modifiers of weight of molten iron are placed in bottom casting ladle, with pouring method in bag, compound modification treatment is carried out to molten iron, temperature of reaction is 1400 ~ 1500 DEG C, and the chemical component weight per-cent of described compound modifier is: FeNB5050 ~ 55%, FeSiRe2120 ~ 25%, FeBa5Si6020 ~ 25%, Yttrium base rare earth 5 ~ 10%;
3), by described molten iron carry out refining by converter or electric furnace, and regulate chemical component weight percentage ratio composition in molten steel to meet as follows: C:0.28%; Si:0.4%; Mo:0.04%, Mn:1%; Ni:1.0%; Cr:0.35%; V:0.10%; P :≤0.02%; S :≤0.02%; Surplus is Fe;
4), the molten steel after refining is carried out casting and become alloy steel casting;
5), thermal treatment, a, annealing: alloy steel casting is placed in temperature lower than in the annealing furnace of 300 DEG C, is warmed up to 800 ± 10 DEG C, be incubated 60 ± 10 minutes, come out of the stove in temperature lower than when 400 DEG C, air cooling; B, quenching: alloy steel casting is placed in temperature lower than in the quenching furnance of 200 DEG C, is warmed up to 550 ± 10 DEG C, be incubated 60 ± 5 minutes, then continue to be warmed up to 800 ± 10 DEG C, be incubated 70 ± 5 minutes, with hardening liquid cooling, hardening liquid is 20-30%KCl, 10-20%NaNO by mass percent
3, 4-8%CaCl
2, 10-18%NaOH, excess water form; C, tempering: steel alloy is placed in temperature lower than in the tempering stove of 70 DEG C, is warmed up to 600 ± 10 DEG C, be incubated 120 ± 5 minutes, air cooling.
Claims (2)
1. a preparation method for nickel-chrome alloy steel, is characterized in that, includes following operation steps,
1), will carry out dehydration pre-treatment containing iron ore material and sinter in agglomerate, the described iron ore material that contains be by weight percentage by the limonite of 20 ~ 40%, the rhombohedral iron ore of 30 ~ 50%, and surplus is red soil nickel ore composition;
2), agglomerate is obtained molten iron through blast-furnace smelting, 1.0 ~ 2.0% compound modifiers of weight of molten iron are placed in bottom casting ladle, with pouring method in bag, compound modification treatment is carried out to molten iron, temperature of reaction is 1400 ~ 1500 DEG C, and the chemical component weight per-cent of described compound modifier is: FeNB5050 ~ 55%, FeSiRe2120 ~ 25%, FeBa5Si6020 ~ 25%, Yttrium base rare earth 5 ~ 10%;
3), by described molten iron carry out refining by converter or electric furnace, and regulate chemical component weight percentage ratio composition in molten steel to meet as follows: C:0.2 ~ 0.35%; Si:0.3 ~ 0.6%; Mo:0.03 ~ 0.06%, Mn:0.8 ~ 1.2%; Ni:0.45 ~ 1.5%; Cr:0.05 ~ 0.8%; V:0.03 ~ 0.25%; P :≤0.02%; S :≤0.02%; Surplus is Fe;
4), the molten steel after refining is carried out casting and become alloy steel casting;
5), thermal treatment,
A, annealing: alloy steel casting is placed in temperature lower than in the annealing furnace of 300 DEG C, is warmed up to 800 ± 10 DEG C, be incubated 60 ± 10 minutes, come out of the stove in temperature lower than when 400 DEG C, air cooling;
B, quenching: alloy steel casting is placed in temperature lower than in the quenching furnance of 200 DEG C, is warmed up to 550 ± 10 DEG C, be incubated 60 ± 5 minutes, then continue to be warmed up to 800 ± 10 DEG C, be incubated 70 ± 5 minutes, with hardening liquid cooling, hardening liquid is 20-30%KCl, 10-20%NaNO by mass percent
3, 4-8%CaCl
2, 10-18%NaOH, excess water form;
C, tempering: steel alloy is placed in temperature lower than in the tempering stove of 70 DEG C, is warmed up to 600 ± 10 DEG C, be incubated 120 ± 5 minutes, air cooling.
2. the preparation method of nickel-chrome alloy steel according to claim 1, is characterized in that, in described molten steel, chemical component weight percentage ratio composition meets as follows: C:0.28%; Si:0.4%; Mo:0.04%, Mn:1%; Ni:1.0%; Cr:0.35%; V:0.10%; P :≤0.02%; S :≤0.02%; Surplus is Fe.
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| CN104087808A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | A preparing method of a nickel- and chromium- containing automobile wheel hub bearing unit |
| JP6179478B2 (en) * | 2014-08-01 | 2017-08-16 | 住友金属鉱山株式会社 | Pellet manufacturing method, iron-nickel alloy manufacturing method |
| CN106148798A (en) * | 2015-03-23 | 2016-11-23 | 江苏锦明不锈钢新材料有限公司 | A kind of stainless preparation technology |
| CN105296883A (en) * | 2015-11-03 | 2016-02-03 | 合肥海源机械有限公司 | Preparation process of alloy steel for forklift axle |
| CN105296889A (en) * | 2015-11-03 | 2016-02-03 | 合肥海源机械有限公司 | Manufacturing method of automobile speed changing box alloy gear shaft |
| CN106048145A (en) * | 2016-07-07 | 2016-10-26 | 安庆市庆华精工机械有限责任公司 | Subcritical quenching thermal treatment method and device for chromium alloy steel |
| CN106167851A (en) * | 2016-07-07 | 2016-11-30 | 安庆市庆华精工机械有限责任公司 | A kind of hub heat treatment device and processing method |
| CN106319347B (en) * | 2016-10-27 | 2018-12-11 | 钢铁研究总院淮安有限公司 | A kind of silicon vanadium steel plate and manufacturing method improving ballistic performance |
| CN108385009A (en) * | 2018-04-13 | 2018-08-10 | 盐城市鑫洋电热材料有限公司 | A kind of preparation method of ferrochrome molybdenum alloy |
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| JPS61153227A (en) * | 1984-12-27 | 1986-07-11 | Kawasaki Steel Corp | Ceramic roll for continuous heat treating furnace |
| CN101418368B (en) * | 2008-12-04 | 2010-12-15 | 江苏华久特钢工具有限公司 | Heat treating process for eliminating mixed crystal of low-alloy quick-cutting steel |
| CN101899551B (en) * | 2009-05-26 | 2011-11-16 | 宁波市鄞州商业精密铸造有限公司 | Heat treatment technology of wear-resistant alloy cast steel |
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| CN102220484B (en) * | 2011-05-27 | 2012-10-03 | 广西盛隆冶金有限公司 | Application and method of laterite nickel ore for producing sinter |
| CN102321849B (en) * | 2011-09-05 | 2012-12-12 | 广西盛隆冶金有限公司 | Preparation method of nickel-chrome alloy steel |
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Effective date of registration: 20170426 Address after: 224000 Port Industrial Zone, Dafeng Port Economic Zone, Dafeng, Jiangsu, Yancheng City Patentee after: YANCHENG LIANXIN STEEL Co.,Ltd. Address before: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20170426 Address after: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 233200 Chuzhou City, Dingyuan Province, Lianjiang Town, the town of the union of the three small village group No. 7 Patentee before: Qu Lishuang |