CN102162070A - Connecting rod material for engines in powder metallurgy and preparation method thereof - Google Patents
Connecting rod material for engines in powder metallurgy and preparation method thereof Download PDFInfo
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- CN102162070A CN102162070A CN 201110078381 CN201110078381A CN102162070A CN 102162070 A CN102162070 A CN 102162070A CN 201110078381 CN201110078381 CN 201110078381 CN 201110078381 A CN201110078381 A CN 201110078381A CN 102162070 A CN102162070 A CN 102162070A
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Abstract
The invention discloses a connecting rod material for engines in powder metallurgy and a preparation method thereof. The alloy comprises the following components in percentage by weight: 0.5-1.5% of Mo, 0.5-1.5% of Cr, 0.5-1.0% of Mn, 0.5-1.0% of Si, 1.5-2.0% of Ni, 1.0-2.0% of Cu, 0.4-0.8% of C and the balance of Fe. The preparation method comprises the following steps: mixing, rolling, sintering, carrying out fine die forging, quenching and tempering. The forging density of the material is greater than 7.6g/cm<3>, the tensile strength is greater than 1060 MPa, the yield strength is greater than 600 MPa, the symmetrical cyclic tensile fatigue strength is greater than 350 MPa, and the fatigue life is stably 5 million revolutions.
Description
Technical field
The present invention relates to a kind of powder metallurgy engine link material and preparation method thereof, particularly a kind of ferrous based powder metallurgical engine link material and preparation method thereof.
Background technology
Powder metallurgy is as an advanced person's manufacturing technology, have energy-conservation, efficient, economize plurality of advantages such as material and environmental protection, and the continuous development of automobile industry is for China's sintered metal product industry has been brought fabulous opportunity.Along with the raising day by day of automotive engineering content, automobile is also improving constantly with the state of the art of sintered metal product, and wherein the shared proportion of powdered metal parts of high-performance (high strength, high precision etc.), complicated shape constantly increases.Connecting rod is the major part of motor car engine, and its quality directly affects the overall performance of engine.In the course of the work, stressed complexity of connecting rod and harshness are being born gaseous tension that passes over through piston and the mass force that is produced by part quality.These two kinds of power make connecting rod material produce axial stretching-stress under compression and horizontal stress in bending.The combustion pressure of inflammable gas produces compression pressure, and the to-and-fro movement mass force of part forms tensile stress in connecting rod near top dead center the time.The stress in bending of connecting rod derives from the excentricity of part medullary ray, the distortion of bent axle and body, and the mass force that rotatablely moves of connecting rod itself.Square being directly proportional of the size of mass force and motor speed.The rotating speed of modern motor spirit machine can be up to more than 6000, so mass force occupies very big ratio in the connecting rod load.The load of connecting rod is the luffing stress in bending of constant tension and compression load of minimum and maximum stress amplitude and direction-agile.So must require connecting rod to have enough intensity, rigidity and fatigue strength from the project organization and the material technology aspect of connecting rod.Simultaneously, property development trend such as the superpower of motor car engine, low fuel oil consumption, low vibration and lower noise require to alleviate connecting rod quality, though titanium alloy and aluminium, magnesium metal base composite material etc. can effectively alleviate the quality of connecting rod, but high raw material and manufacturing cost make it can not obtain large-scale industrial application, and iron becomes the preferred material of preparation connecting rod because of having good cost performance.The tired cycle of present iron-based connecting rod material is difficult to reach more than 5,000,000 times, and has complicated process of preparation, the shortcoming that tooling cost is higher.
Summary of the invention
The purpose of this invention is to provide a kind of high performance powder metallurgy engine link material and preparation method thereof.
For achieving the above object, powder metallurgy engine link material of the present invention, the alloying constituent weight percent is Mo0.5 ~ 1.5%, Cr0.5 ~ 1.5%, Mn0.5 ~ 1.0%, Si0.5 ~ 1.0%, Ni1.5 ~ 2.0%, Cu1.0 ~ 2.0%, C 0.4 ~ 0.8%, and surplus is Fe.
Powder metallurgy engine link preparation methods of the present invention may further comprise the steps successively:
A. be Mo0.5 ~ 1.5% by weight percentage, Cr0.5 ~ 1.5%, Mn0.5 ~ 1.0%, Si0.5 ~ 1.0%, Ni1.5 ~ 2.0%, Cu1.0 ~ 2.0%, C 0.4 ~ 0.8%, and surplus mixes after being the Fe batching;
B. compacting, pressing pressure 300 ~ 400MPa;
C. sintering, 1000 ~ 1300 ℃ of sintering temperatures, soaking time 1.5 ~ 2.5 hours;
D. smart die forging, 900 ~ 1100 ℃ of Heating temperatures, soaking time 20 ~ 40 minutes forges pressure 150 ~ 250kg;
E. quench 780 ~ 900 ℃ of quenching temperatures, soaking time 20 ~ 40 minutes; Tempering, 500 ~ 600 ℃ of tempering temperatures, soaking time 50 ~ 70 minutes.
Preferably, sintering temperature is 1050 ℃.
Press the interpolation of aforementioned ratio in the powder metallurgy engine link material of the present invention by silicon and manganese, can reduce the critical quenching rate of steel, when cooling, increase austenitic stability, suppress austenitic decomposition, make the austenite that forms under the high temperature be remained to normal temperature.So not only make steel that enough toughness is arranged, and higher intensity and hardness are arranged, improve the hot workability of steel, the performance of tensile strength and unit elongation cooperates preferably, helps the distortion of hot forging process, thereby finally makes the forging density of material〉7.6g/cm
3, tensile strength〉1060 MPa, yield strength〉600 MPa, the symmetrical cycle tensile fatigue strength〉350 MPa, fatigue lifetime stable 5,000,000 cycles that reach.Powder metallurgy engine link preparation methods of the present invention can not only be prepared qualified stay-in-grade product, and preparation technology is simple, material use efficiency〉96%, greatly reduce tooling cost.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Embodiment 1:
Be Mo0.5% by weight percentage, Cr0.5%, Mn0.5%, Si0.5%, Ni1.5%, Cu1.0%, C 0.4%, and surplus is that mix Fe batching back; Compacting, pressing pressure 300MPa; Sintering, 1000 ℃ of sintering temperatures, 1.5 hours sintered heat insulating time; Smart die forging, 900 ℃ of Heating temperatures, soaking time 20 minutes forges pressure 150kg; 780 ℃ of quenching temperatures, soaking time 20 minutes, 500 ℃ of tempering temperatures, soaking time 50 minutes.The final performance of material is: density 7.62g/cm
3, tensile strength 1066 MPa, yield strength 610MPa, symmetrical cycle tensile fatigue strength 350 MPa, fatigue lifetime stable 5,000,000 cycles that reach.
Embodiment 2:
Be Mo0.8% by weight percentage, Cr0.9%, Mn0.9%, Si06%, Ni1.8%, Cu1.2%, C 0.5%, and surplus is that mix Fe batching back; Compacting, pressing pressure 350MPa; Sintering, 1150 ℃ of sintering temperatures, 2.5 hours sintered heat insulating time; Smart die forging, 1100 ℃ of Heating temperatures, soaking time 30 minutes forges pressure 180kg; 800 ℃ of quenching temperatures, soaking time 30 minutes, 550 ℃ of tempering temperatures, soaking time 60 minutes.The final performance of material is: density 7.65g/cm
3, tensile strength 1100MPa, yield strength 650MPa, symmetrical cycle tensile fatigue strength 360 MPa, fatigue lifetime stable 5,000,000 cycles that reach.
Embodiment 3:
Be Mo1.0% by weight percentage, Cr1.1%, Mn1.2%, Si0.6%, Ni2.0%, Cu1.5%, C 0.7%, and surplus is that mix Fe batching back; Compacting, pressing pressure 350MPa; Sintering, 1300 ℃ of sintering temperatures, 2.5 hours sintered heat insulating time; Smart die forging, 980 ℃ of Heating temperatures, soaking time 40 minutes forges pressure 220kg; 900 ℃ of quenching temperatures, soaking time 30 minutes, 600 ℃ of tempering temperatures, soaking time 60 minutes.The final performance of material is: density 7.76g/cm
3, tensile strength 1320MPa, yield strength 728MPa, symmetrical cycle tensile fatigue strength 360 MPa, fatigue lifetime stable 5,000,000 cycles that reach.
Embodiment 4:
Be Mo1.5% by weight percentage, Cr1.5%, Mn1.0%, Si1.0%, Ni2.0%, Cu2.0%, C 0.8%, and surplus is that mix Fe batching back; Compacting, pressing pressure 400MPa; Sintering, 1050 ℃ of sintering temperatures, 2 hours sintered heat insulating time; Smart die forging, 1050 ℃ of Heating temperatures, soaking time 30 minutes forges pressure 250kg; 880 ℃ of quenching temperatures, soaking time 40 minutes, 540 ℃ of tempering temperatures, soaking time 70 minutes.The final performance of material is: density 7.82g/cm
3, tensile strength 1560 MPa, yield strength 896 MPa, symmetrical cycle tensile fatigue strength 360 MPa, fatigue lifetime stable 5,000,000 cycles that reach.
Claims (3)
1. a powder metallurgy engine link material is characterized in that the alloying constituent weight percent is Mo0.5 ~ 1.5%, Cr0.5 ~ 1.5%, and Mn0.5 ~ 1.0%, Si0.5 ~ 1.0%, Ni1.5 ~ 2.0%, Cu1.0 ~ 2.0%, C 0.4 ~ 0.8%, and surplus is Fe.
2. a powder metallurgy engine link preparation methods is characterized in that, may further comprise the steps successively:
A. be Mo0.5 ~ 1.5% by weight percentage, Cr0.5 ~ 1.5%, Mn0.5 ~ 1.0%, Si0.5 ~ 1.0%, Ni1.5 ~ 2.0%, Cu1.0 ~ 2.0%, C 0.4 ~ 0.8%, and surplus mixes after being the Fe batching;
B. compacting, pressing pressure 300 ~ 400MPa;
C. sintering, 1000 ~ 1300 ℃ of sintering temperatures, soaking time 1.5 ~ 2.5 hours;
D. smart die forging, 900 ~ 1100 ℃ of Heating temperatures, soaking time 20 ~ 40 minutes forges pressure 150 ~ 250kg;
E. quench 780 ~ 900 ℃ of quenching temperatures, soaking time 20 ~ 40 minutes; Tempering, 500 ~ 600 ℃ of tempering temperatures, soaking time 50 ~ 70 minutes.
3. according to claim 2 powder metallurgy engine link preparation methods, it is characterized in that sintering temperature is 1050 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110078381 CN102162070A (en) | 2011-03-30 | 2011-03-30 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
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| CN 201110078381 CN102162070A (en) | 2011-03-30 | 2011-03-30 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990068A (en) * | 2012-11-22 | 2013-03-27 | 宁波市群星粉末冶金有限公司 | Powder metallurgy gear |
| CN103014507A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powder metallurgy flange and preparation method thereof |
| CN103276166A (en) * | 2013-06-06 | 2013-09-04 | 山东莱芜金华辰粉末冶金制品有限公司 | Heating method before forging for manufacturing engine connecting rod by powder metallurgy |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
| CN105483500A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of automobile engine cylinder block |
| CN105952773A (en) * | 2016-07-18 | 2016-09-21 | 安徽奥泰粉末冶金有限公司 | Powder metallurgy connecting rod for automobile engine and production method of powder metallurgy connecting rod |
| CN109295398A (en) * | 2018-07-30 | 2019-02-01 | 常州格瑞特粉末冶金有限公司 | A kind of powder metallurgy brake boost pump shaft coupling production technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470347A (en) * | 2003-06-25 | 2004-01-28 | 长春东北大学粉末冶金有限责任公司 | Powder metallurgy hot-forged automobile connecting rod and production process |
| CN1647874A (en) * | 2004-01-28 | 2005-08-03 | 博格华纳公司 | Method to make sinter-hardened powder metal parts with complex shapes |
| CN1800427A (en) * | 2004-12-31 | 2006-07-12 | 马鞍山钢铁股份有限公司 | Bainite steel for railroad carriage wheel |
-
2011
- 2011-03-30 CN CN 201110078381 patent/CN102162070A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470347A (en) * | 2003-06-25 | 2004-01-28 | 长春东北大学粉末冶金有限责任公司 | Powder metallurgy hot-forged automobile connecting rod and production process |
| CN1647874A (en) * | 2004-01-28 | 2005-08-03 | 博格华纳公司 | Method to make sinter-hardened powder metal parts with complex shapes |
| CN1800427A (en) * | 2004-12-31 | 2006-07-12 | 马鞍山钢铁股份有限公司 | Bainite steel for railroad carriage wheel |
Non-Patent Citations (2)
| Title |
|---|
| 《模具技术》 20001231 洪慎章等 "发动机连杆的粉末锻造工艺" 第54页 2-3 , 第2期 * |
| 《金属热处理》 20090430 刘芳等 "高韧高强铁基粉末冶金耐磨材料的制备" 第5、8页 2-3 第34卷, 第4期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990068A (en) * | 2012-11-22 | 2013-03-27 | 宁波市群星粉末冶金有限公司 | Powder metallurgy gear |
| CN103014507A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powder metallurgy flange and preparation method thereof |
| CN103276166A (en) * | 2013-06-06 | 2013-09-04 | 山东莱芜金华辰粉末冶金制品有限公司 | Heating method before forging for manufacturing engine connecting rod by powder metallurgy |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
| CN103469047B (en) * | 2013-09-17 | 2015-10-28 | 北京科技大学 | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
| CN105483500A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of automobile engine cylinder block |
| CN105952773A (en) * | 2016-07-18 | 2016-09-21 | 安徽奥泰粉末冶金有限公司 | Powder metallurgy connecting rod for automobile engine and production method of powder metallurgy connecting rod |
| CN109295398A (en) * | 2018-07-30 | 2019-02-01 | 常州格瑞特粉末冶金有限公司 | A kind of powder metallurgy brake boost pump shaft coupling production technology |
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Application publication date: 20110824 |