双材质粉锻连杆材料的微观组织及力学性能研究  

Microstructure and mechanical properties of double material powder forging connecting rod material

作　　者：邵静静 毛敏捷 李建 张广为 SHAO Jing-jing;MAO Min-jie;LI Jian;ZHANG Guang-wei(School of Mechanical and Automotive Qingdao University of Technology,Qingdao 266500,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266500

出　　处：《粉末冶金工业》2020年第3期31-35,共5页Powder Metallurgy Industry

摘　　要：发动机连杆的大头和杆部由于工况不同,对其主要性能的要求也不同,可以利用粉末锻造技术创新研发一种可以同时满足连杆大头和杆部不同要求的双材质粉锻连杆。这种连杆大头处采用材料D01(Fe-2.0Cu-0.32MnS-0.6C),小头和杆部采用材料X01(Fe-3.25Cu-0.6C)。分别对材料D01、X01以及两种材料的混合材料ZDX的微观组织和力学性能进行研究。结果显示:材料X01在去除MnS和提高铜含量后表现出更高的抗拉强度和疲劳强度;材料D01抗拉强度和疲劳强度稍弱,但这种材料具有良好的塑性。将X01、D01两种材料分别应用于连杆杆部和大头能够更好地满足连杆的性能要求。Due to different working conditions,the main performance requirements of engine connecting rod are different.The powder forging technology can be used to innovatively develop a dual material powder forging connecting rod which can meet the different requirements of connecting big-end and rod.The material is D01(Fe-2.0 Cu-0.32 MnS-0.6 C)at the big-end of the connecting rod,and X01(Fe-3.25 Cu-0.6 C)is used in the small-end and the rod.The microstructure and mechanical properties of D01,X01 and ZDX(mixed materials of D01 and X01)were studied respectively.The results show that X01 exhibits higher tensile strength and fatigue strength after removing MnS and increasing copper content.The tensile strength and fatigue strength of D01 are slightly weaker,but this material has good plasticity.The two materials can be applied to the connecting rod part and the big-end to better meet the performance requirements of the connecting rod.

关 键 词：双材质 粉锻连杆 微观组织 力学性能 

分 类 号：TG316[金属学及工艺—金属压力加工] TG113[动力工程及工程热物理—动力机械及工程] TK403