摘要
由于真空烧结涂层基体的硬度较低,采用对基体调质处理的方法来提高涂层基体的硬度。然后测量涂层和基体的硬度,并通过采用旋转弯曲疲劳试验比较涂层试样与未涂层试样的疲劳强度。试验结果表明:调质处理提高基体的硬度,而涂层硬度基本不变;涂层与未涂层试样的S N曲线相互交叉,在N<3×105时,涂层试样的疲劳强度大于未涂层试样,但在N>3×105时,则结果相反。
Because the hardness of substrate was low after vacuum melting, the hardness of substrate was increased by hardening and tempering methods. Then hardness of coatings and substrate was measured. By means of bend-rotation fatigue tests, fatigue strength of coating and uncoating specimens was compared after hardening and tempering. The results show that the substrate was increased while coatings were hardly increased. Both S-N curves of coating and uncoating specimens were cross each other. In the N<3×105, fatigue strength of coating specimens was higher than that of uncoating specimens. But it was reverse in N>3×105.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2004年第5期22-23,34,共3页
Surface Technology
关键词
疲劳强度
钴基合金
显微硬度
真空熔烧
Fatigue strength
Co-based alloy
Microhardness
Vacuum melting
