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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- connecting rod
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- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 238000005242 forging Methods 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims 1
- 238000002791 soaking Methods 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 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 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
本发明公开了一种粉末冶金发动机连杆材料及其制备方法，其合金成分重量百分比为Mo0.5~1.5%，Cr0.5~1.5%，Mn0.5~1.0%，Si0.5~1.0%，Ni1.5~2.0%，Cu1.0~2.0%，C0.4~0.8%，余量为Fe。制备方法包括配料、压制、烧结、精模锻和淬火、回火。材料的锻造密度>7.6g/cm3，抗拉强度>1060MPa，屈服强度>600MPa，对称循环抗拉疲劳强度>350MPa，疲劳寿命稳定达500万周次。The invention discloses a powder metallurgy engine connecting rod material and a preparation method thereof. The alloy composition 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%, C0.4~0.8%, and the balance is Fe. The preparation method includes batching, pressing, sintering, precision die forging, quenching and tempering. The forging density of the material is >7.6g/cm 3 , the tensile strength is >1060MPa, the yield strength is >600MPa, the symmetrical cycle tensile fatigue strength is >350MPa, and the fatigue life is stable up to 5 million cycles.
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102162070A true CN102162070A (en) | 2011-08-24 |
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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 |
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2011
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Patent Citations (3)
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| 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)
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| 《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 |