摘要
对经真空熔炼、热锻、固溶和时效处理、拉拔变形获得的Cu0.40Cr0.10Zr合金线材进行了电滑动磨损试验,利用扫描电镜对合金磨损后的合金微观形貌进行了观察和分析。结果表明,CuCrZr合金在磨损过程中,表层先产生塑性变形和加工硬化现象。在较大电流(50A)作用下,合金次表层中会产生明显再结晶层,与表面未再结晶层之间存在较大拉应力,从而促进磨损裂纹的萌生和扩展,加速磨损过程。加工过程中产生的裂纹,将对合金的磨损性能产生不利影响。
The electrical sliding wear tests of Cu-Cr-Zr alloy wires, made by vacuum melting-hot forging-solution-aging-drawing,were carried out. Using SEM,the worn surface morphology of the test alloy was investigated. The results show that plastic deformation and work hardening were seen firstly on the surface of Cu-Cr-Zr alloy during the wearing process. Under larger current, such as 50A, the recrystallization layer appears obviously in the subsurface, causing large tensile stress between the subsurface and the surface without recrystallization. The tensile stress promotes the crack initiation and propagation, and accelerate the wearing process. The cracks initiated during working process are harmful to the wear resistance of the test alloy.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2006年第3期85-87,共3页
Heat Treatment of Metals
基金
国家科技部"863"计划项目(2002AA331110)
河南省杰出人才基金项目(0521001200)
河南省教育厅自然科学基金项目(2006430004)
河南科技大学科研基金项目(2004ZY003)
