烧结温度对Al-Cu系含油轴承压溃强度、含油率和微观形貌的影响  

Effect of sintering temperature on crushing strength,oil content and microstructure of Al-Cu oil bearing

作　　者：安旭光[1] 查五生[1] 雷宇[1] 贾永灿[1] 胡绍磊[1] 

机构地区：[1]西华大学材料科学与工程学院,成都610039

出　　处：《粉末冶金技术》2012年第2期108-111,共4页Powder Metallurgy Technology

基　　金：西华大学创新基金项目;四川省教育厅重点项目(12ZA158)

摘　　要：采用粉末冶金法制备了Al-Cu系含油轴承,研究了烧结温度对Al-Cu系含油轴承的压溃强度、含油率和微观形貌的影响规律及机理。结果表明:烧结温度显著影响Al-Cu系含油轴承的压溃强度、含油率和微观形貌;以540℃、550℃、560℃和570℃真空烧结,烧结坯分别呈现出欠烧结、最佳烧结、过烧结及熔融等不同状态;540℃烧结时,粉末颗粒之间未发生明显的冶金结合,压溃强度较低;高于560℃烧结时,烧结坯发生过烧结及熔融,收缩较大,含油率较低;550℃为最佳烧结温度,在此温度下,烧结坯发生局部熔化,粉末颗粒之间产生良好的冶金结合,微观形貌良好,压溃强度和含油率达到最佳,分别为198MPa和22%。Using powder metallurgy process,the Al-Cu oil bearings were prepared and the effects of sintering temperature on crushing strength,oil content and microstructure were investigated.The results show that the sintering temperature influences sensitively the crushing strength,oil content and microstructure of Al-Cu oil bearing.The Al-Cu oil bearings sintered in vacuum at the temperature of 540℃,550℃,560℃ and 570℃ show different sintered states,such as sub-sintered state,best-sintered state,and over-sintered or molten state.Powder particles are not metallurgically bonded with each other and the crushing strength is very low for sintering at 540℃.For sintering beyond 560℃,the Al-Cu oil bearing is molten and the microstructure changes greatly,and oil content is also very low.550℃ is the best sintering temperature,powder particles have been partly molten and metallurgically bonded,so the Al-Cu oil bearings have a best-sintered state and good microstructure.Crushing strength and oil content reach 198MPa and 22%,respectively.

关 键 词：粉末冶金 Al基含油轴承 烧结温度 含油率 压溃强度 

分 类 号：TF122.1[冶金工程—粉末冶金]