CN102373359A - Method for producing alloy steel powder special for automobile engines - Google Patents
Method for producing alloy steel powder special for automobile engines Download PDFInfo
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- CN102373359A CN102373359A CN2010102584470A CN201010258447A CN102373359A CN 102373359 A CN102373359 A CN 102373359A CN 2010102584470 A CN2010102584470 A CN 2010102584470A CN 201010258447 A CN201010258447 A CN 201010258447A CN 102373359 A CN102373359 A CN 102373359A
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Abstract
The invention relates to a method for producing alloy steel powder special for automobile engines. The method is characterized in that: the alloy steel powder is formed by mixing high alloy steel powder and water atomized pure iron powder in a segregation-free adhesion mode, and the method comprises the following steps of: 1) preparing the water atomized pure iron powder; 2) preparing the high alloy steel powder; and 3) performing segregation-free adhesion, namely adding the high alloy steel powder and the water atomized pure iron powder into a blender mixer in a ratio, spraying adhesive when the heating temperature reaches 50 to 140 DEG C, mixing for 60 to 100 minutes, extracting volatile substances in vacuum, cooling the volatile substances to the temperature of below 40 DEG C, adding a lubricating agent, mixing uniformly, and packing. Compared with the prior art, the method has the advantages that: 1, the alloy steel powder has relatively high compressibility; 2, the alloy elements can be completely alloyed in the product sintering process; and 3, the alloy elements are not segregated in the transportation and mixing treatment processes, the stability of dimensional tolerance can be kept in the product sintering process, and the mechanical property of a sintered piece is improved.
Description
Technical field
The invention belongs to field of powder metallurgy, relate in particular to a kind of method that adopts high-alloy steel powder and water atomization straight iron powder production motor car engine special metals comminuted steel shot.
Background technology
Motor car engine requires to have HS, high firmness, high heat resistance with alloy powder, and has and can reach the hard high-strength mechanical property after once sintered.At present production motor car engine in home and abroad all adopts following dual mode with alloy powder: 1), the alloy molten steel directly is atomized into alloy powder, its shortcoming for be prone to oxidation, compressibility is low, and then influences intensity, the hardness of product.2), be mixed into alloy powder with isozygoty bronze and iron powder, its shortcoming is that cost is high, degree of segregation is big.
Summary of the invention
The working method that the purpose of this invention is to provide a kind of motor car engine special metals comminuted steel shot; High-alloy steel powder is mixed through the segregation-free bonding mode with the water atomization straight iron powder; Reduce degree of segregation, improve density of product, improve over-all propertieies such as product hardness, intensity.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of working method of motor car engine special metals comminuted steel shot is mixed through the segregation-free bonding mode by high-alloy steel powder and water atomization straight iron powder, and its operation steps is narrated as follows:
1) preparation water atomization straight iron powder comprises smelting, atomizing, reduction, and its operation steps is following:
A, smelting: with steel scrap, the pig iron etc. is main raw material, and the smelting through electric furnace obtains the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1600～1800 ℃, its main chemical ingredients is by weight percentage:
C≤0.60％ Si≤0.50％ Mn≤0.50％ P≤0.050％ S≤0.050％；
B, atomizing: atomization process is to carry out through the water atomization system, atomizing pressure 60～160Mpa, and the water atomization hair powder that obtains through dehydration, drying after the atomizing, drying temperature is 110～300 ℃, hydrogen loss≤3.0%;
C, reduction: above-mentioned water atomization hair powder is reduced 550～800 ℃ of reduction furnace reduction preheating section temperature, 800～1000 ℃ of high temperature section temperature, 500～800 ℃ of cooling section temperature, ammonia flow 60～190m through reduction furnace
3/ h, travelling speed 90～300mm/min, bed thickness 12～48mm; Obtain the water atomization straight iron powder;
Water atomization straight iron powder that d, step c obtain through broken, sieve, close batch, detect and obtain finished product water atomization straight iron powder;
2) preparation high-alloy steel powder comprises smelting, atomizing, and its operation steps is following:
A, smelting: with various alloys and iron alloy is main raw material, smelts through high-frequency furnace to obtain the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1500～1700 ℃, its chemical ingredients is by weight percentage:
Ni:5-12%, Cr:11-19%, Co:26-35%, Mo:15-25%, Si:0.3-1.5%, V:0.5-3.3%, C :≤4.0%, surplus is Fe; Above composition summation is 100%;
B, atomizing: atomization process is to implement atomizing pressure through the aerosolization system: 50～130Mpa, medium are nitrogen;
C, resulting high-alloy steel powder are criticized through sieving, closing, detection obtains the finished product high-alloy steel powder.
3) segregation-free bonding added above-mentioned finished product high-alloy steel powder and finished product water atomization straight iron powder in the mixer by 1: 5, mixed and heating; The mixture chemical ingredients is by weight percentage: Ni:1.0-2.4%, Cr:2.2-3.8%, Co:5.2-7.0%; Mo:3.0-5.0%, Si:0.06-0.3%, V:0.1-0.66%; C :≤0.8%, surplus is Fe, above composition summation is 100%; When temperature reaches 50～140 ℃; Spray into the polyoxyethylene glycol of mixture weight per-cent 0.001%～1.0%; Mixed 60～100 minutes; It is to be cooled to below 40 ℃ to extract volatile matter out with vacuum, and the micro mist wax that adds mixture weight per-cent 0.5～1.2% again mixes the back packing, obtains finished product special metals comminuted steel shot.
Compared with prior art, the invention has the beneficial effects as follows: 1, have higher compressibility; 2, alloying element can be further in the goods sintering process alloying fully; 3, in transportation and combination treatment process, do not produce the alloy element component segregation, in the goods sintering process, can keep tolerance of dimension stable, the more effective mechanical property of improving sintered part.
Embodiment
Be described further below in conjunction with the embodiment specific embodiments of the invention:
A kind of working method of motor car engine special metals comminuted steel shot is mixed through the segregation-free bonding mode by high-alloy steel powder and water atomization straight iron powder, and its operation steps is narrated as follows:
1) preparation water atomization straight iron powder comprises smelting, atomizing, reduction, and its operation steps is following:
A, smelting: with steel scrap, the pig iron etc. is main raw material, and the smelting through electric furnace obtains the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1600～1800 ℃, its main chemical ingredients is by weight percentage:
C≤0.60％ Si≤0.50％ Mn≤0.50％ P≤0.050％ S≤0.050％；
B, atomizing: atomization process is to carry out through the water atomization system, atomizing pressure 60～160Mpa, and the water atomization hair powder that obtains through dehydration, drying after the atomizing, drying temperature is 110～300 ℃, hydrogen loss≤3.0%;
C, reduction: above-mentioned water atomization hair powder is reduced 550～800 ℃ of reduction furnace reduction preheating section temperature, 800～1000 ℃ of high temperature section temperature, 500～800 ℃ of cooling section temperature, ammonia flow 60～190m through reduction furnace
3/ h, travelling speed 90～300mm/min, bed thickness 12～48mm; Obtain the water atomization straight iron powder;
D, resulting water atomization straight iron powder through broken, sieve, close batch, detect and obtain finished product water atomization straight iron powder.
2) preparation high-alloy steel powder comprises smelting, atomizing, and its operation steps is following:
A, smelting: with various alloys and iron alloy is main raw material, smelts through high-frequency furnace to obtain the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1500～1700 ℃, its chemical ingredients is by weight percentage:
Ni:5-12%, Cr:11-19%, Co:26-35%, Mo:15-25%, Si:0.3-1.5%, V:0.5-3.3%, C :≤4.0%, surplus is Fe; Above composition summation is 100%;
B, atomizing: atomization process is to implement atomizing pressure through the aerosolization system: 50～130Mpa, medium are nitrogen;
C, resulting high-alloy steel powder are criticized through sieving, closing, detection obtains the finished product high-alloy steel powder.
3), segregation-free bonding, above-mentioned high-alloy steel powder and water atomization straight iron powder were added in the mixer by 1: 5, mix also and heat; The mixture chemical ingredients is by weight percentage: Ni:1.0-2.4%, Cr:2.2-3.8%, Co:5.2-7.0%; Mo:3.0-5.0%, Si:0.06-0.3%, V:0.1-0.66%; C :≤0.8%, surplus is Fe, above composition summation is 100%; When temperature reaches 50～140 ℃; Spray into the sticker-polyoxyethylene glycol of mixture weight per-cent 0.001%～1.0%; Mixed 60～100 minutes; It is to be cooled to below 40 ℃ to extract volatile matter out with vacuum, and the lubricant-micro mist wax that adds mixture weight per-cent 0.5～1.2% again mixes the back packing, obtains finished product special metals comminuted steel shot.
To produce chemical ingredients serves as that prescription is Ni:1.4% by weight percentage, Cr:3.5%, and Co:6%, Mo:19%, Si:0.1%, V:0.2%, C:1.9%, surplus is that the special metals comminuted steel shot of Fe is an example, different process process performance parameter relatively sees the following form 1:
1) pure atomized alloy comminuted steel shot
2) water atomization straight iron powder+high-alloy steel powder
3) the water atomization straight iron powder+bronze isozygotys
Table 1: different process process performance parameter relatively
Sintering condition: sintering temperature: 1120 ℃, soaking time 60min, H
2100%;
Obviously be superior to the alloy that alternate manner is produced at aspects such as intensity, hardness and size changing rates through above-mentioned relatively water atomization straight iron powder+high-alloy steel powder; Can in the goods sintering process, keep tolerance of dimension stable; The more effective mechanical property of improving sintered part satisfies the requirement of motor car engine HS, high firmness, high heat resistance.
Claims (1)
1. the working method of a motor car engine special metals comminuted steel shot is characterized in that, is mixed through the segregation-free bonding mode by high-alloy steel powder and water atomization straight iron powder, and its operation steps is narrated as follows:
1) preparation water atomization straight iron powder comprises smelting, atomizing, reduction, and its operation steps is following:
A, smelting: with steel scrap, the pig iron etc. is main raw material, and the smelting through electric furnace obtains the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1600～1800 ℃, its main chemical ingredients is by weight percentage:
C≤0.60％ Si≤0.50％ Mn≤0.50％ P≤0.050％ S≤0.050％；
B, atomizing: atomization process is to carry out through the water atomization system, atomizing pressure 60～160Mpa, and the water atomization hair powder that obtains through dehydration, drying after the atomizing, drying temperature is 110～300 ℃, hydrogen loss≤3.0%;
C, reduction: above-mentioned water atomization hair powder is reduced 800～1000 ℃ of 550～800 ℃ of high temperature section temperature of reduction furnace reduction preheating section temperature, 500～800 ℃ of cooling section temperature, ammonia flow 60～190m through reduction furnace
3/ h, travelling speed 90～300mm/min, bed thickness 12～48mm; Obtain the water atomization straight iron powder;
Water atomization straight iron powder that d, step c obtain through broken, sieve, close batch, detect and obtain finished product water atomization straight iron powder;
2) preparation high-alloy steel powder comprises smelting, atomizing, and its operation steps is following:
A, smelting: with various alloys and iron alloy is main raw material, smelts through high-frequency furnace to obtain the molten steel that composition is uniform and stable, impurity is few, tapping temperature: 1500～1700 ℃, its chemical ingredients is by weight percentage:
Ni:5-12%, Cr:11-19%, Co:26-35%, Mo:15-25%, Si:0.3-1.5%, V:0.5-3.3%, C :≤4.0%, surplus is Fe; , above composition summation is 100%;
B, atomizing: atomization process is to implement atomizing pressure through the aerosolization system: 50～130Mpa, medium are nitrogen;
C, resulting high-alloy steel powder are criticized through sieving, closing, detection obtains the finished product high-alloy steel powder.
3) segregation-free bonding added above-mentioned finished product high-alloy steel powder and finished product water atomization straight iron powder in the mixer by 1: 5, mixed and heating; The mixture chemical ingredients is by weight percentage: Ni:1.0-2.4%, Cr:2.2-3.8%, Co:5.2-7.0%; Mo:3.0-5.0%, Si:0.06-0.3%, V:0.1-0.66%; C :≤0.8%, surplus is Fe, above composition summation is 100%; When temperature reaches 50～140 ℃; Spray into the polyoxyethylene glycol of mixture weight per-cent 0.001%～1.0%; Mixed 60～100 minutes; It is to be cooled to below 40 ℃ to extract volatile matter out with vacuum, and the micro mist wax that adds mixture weight per-cent 0.5～1.2% again mixes the back packing, obtains finished product special metals comminuted steel shot.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148827A (en) * | 2016-08-15 | 2016-11-23 | 合肥万向钱潮汽车零部件有限公司 | A kind of automobile cross axle |
| CN108687356A (en) * | 2017-04-10 | 2018-10-23 | 现代自动车株式会社 | Prepare the method for iron powder and iron powder prepared therefrom |
| CN110234448A (en) * | 2017-02-02 | 2019-09-13 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
| CN110267754A (en) * | 2017-02-02 | 2019-09-20 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
| CN113649559A (en) * | 2021-08-03 | 2021-11-16 | 鞍钢(鞍山)冶金粉材有限公司 | Straight gear mixed iron powder for powder metallurgy and preparation method thereof |
| CN117259758A (en) * | 2023-10-05 | 2023-12-22 | 广东三浩铸锻科技有限公司 | Method for preparing part from waste steel |
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| JP2006089829A (en) * | 2004-09-27 | 2006-04-06 | Jfe Steel Kk | Iron-base powdery mixture for powder metallurgy |
| US20070048166A1 (en) * | 2005-08-26 | 2007-03-01 | Apex Advanced Technologies, Llc | Powder metal composition containing micronized deformable solids and methods of making and using the same |
| CN101413082A (en) * | 2008-11-26 | 2009-04-22 | 莱芜钢铁集团粉末冶金有限公司 | Easy-to-cut water atomized steel powder and production method thereof |
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| CN1410208A (en) * | 2002-11-25 | 2003-04-16 | 莱芜钢铁集团粉末冶金有限公司 | Manufacturing method of alloy steel powder by spraying etc. |
| JP2006089829A (en) * | 2004-09-27 | 2006-04-06 | Jfe Steel Kk | Iron-base powdery mixture for powder metallurgy |
| US20070048166A1 (en) * | 2005-08-26 | 2007-03-01 | Apex Advanced Technologies, Llc | Powder metal composition containing micronized deformable solids and methods of making and using the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148827A (en) * | 2016-08-15 | 2016-11-23 | 合肥万向钱潮汽车零部件有限公司 | A kind of automobile cross axle |
| CN110234448A (en) * | 2017-02-02 | 2019-09-13 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
| CN110267754A (en) * | 2017-02-02 | 2019-09-20 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
| CN110267754B (en) * | 2017-02-02 | 2021-10-29 | 杰富意钢铁株式会社 | Mixed powder for powder metallurgy, sintered body, and method for producing sintered body |
| CN108687356A (en) * | 2017-04-10 | 2018-10-23 | 现代自动车株式会社 | Prepare the method for iron powder and iron powder prepared therefrom |
| CN113649559A (en) * | 2021-08-03 | 2021-11-16 | 鞍钢(鞍山)冶金粉材有限公司 | Straight gear mixed iron powder for powder metallurgy and preparation method thereof |
| CN117259758A (en) * | 2023-10-05 | 2023-12-22 | 广东三浩铸锻科技有限公司 | Method for preparing part from waste steel |
| CN117259758B (en) * | 2023-10-05 | 2024-03-29 | 广东三浩铸锻科技有限公司 | Method for preparing part from waste steel |
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Effective date of registration: 20170331 Address after: Lingshan Hongqi Road 114042 Anshan city of Liaoning Province, Lishan District No. 9 Patentee after: Anshan Iron and steel (Anshan) metallurgical powder Co., Ltd. Address before: Anshan City, Liaoning province 114031 Lishan District Jianguo Road 40 A Patentee before: Angang Heavy Machinery Co., Ltd. |
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