42CrMo钢半轴的断裂失效分析  

Fracture Failure Analysis of 42CrMo Steel Half Shaft

作　　者：刘敬平[1] 王翠芳[1] 卢杉[1] 

机构地区：[1]焦作大学机电工程学院,河南焦作454000

出　　处：《热加工工艺》2017年第16期251-253,256,共4页Hot Working Technology

基　　金：河南省科技攻关项目(142102210267)

摘　　要：研究了半轴断口的宏观形貌和微观组织。结果表明:半轴的心部材料有晶界熔化的痕迹,呈现较为明显的树枝晶分布。断口附近的显微组织中存在磷、钼、铬和锰合金元素的偏聚,从而恶化了半轴的力学性能,导致了早期的断裂失效。The macro morphology and microstructure of half shaft fracture were studied. The results show that the half shaft core material has grain boundary melting trace, which show obvious branch crystal distribution. The microstructure near the fracture surface generates the segregation of P, Mo, Cr and Mn alloy elements, which can result in the deterioration of the mechanical properties and lead to the early fracture failure.

关 键 词：半轴 42CRMO钢 失效分析 偏析 

分 类 号：TG142.33[一般工业技术—材料科学与工程]