冲击能量对钨铬表面复合层冲击磨损特性的影响  

Influence of Impact Energy on Impact Wear Mechanism of Tungsten-Chromium Surface Composite Layer

作　　者：贾利晓[1] 

机构地区：[1]洛阳理工学院机械工程系,河南洛阳471003

出　　处：《热加工工艺》2007年第21期25-27,共3页Hot Working Technology

基　　金：河南省杰出人才创新基金项目(0421000600)

摘　　要：采用传统的铸渗工艺在铸钢件表面制备了钨铬复合层,采用MLD-10型动载磨料磨损试验机进行了冲击磨损试验,并用扫描电镜观察了复合渗层的磨损形貌,分析了冲击能量对复合渗层冲击磨损机理的影响。结果表明:在较小冲击能量条件下(1～2 J),主要是碳化物的碎裂、脱落造成磨损,而在较大冲击能量条件下,主要是由裂纹的形成和扩展造成复合层的剥落磨损。Using traditional cast-penetrating process, the tungsten-chromium composite layers were formed on cast steel. The influence of impact energy on impact wear properties of surface composite layer was studied by MLD-10 dynamic load abrasive wear tester, And the influence of impact energy on wear mechanism of composite layer was also discussed. The resuits show that the wear rate of surface composite layer rises with the increase of impact energy; and abrasion of composite layer results from smash and break-off of carbide in the condition of less impact energy ,while in the condition of greater impact energy, that results from formation and extension of cracks.

关 键 词：复合层 冲击磨损机理 碎裂 脱落 裂纹的形成和扩展 

分 类 号：TG115.58[金属学及工艺—物理冶金]