摘要
采用弯曲疲劳和拉-压疲劳试验，比较了45钢基体上真空熔覆镍基合金／WC复合涂层试样在不同应力状态下的疲劳强度，并与45钢基体材料进行了对比。结果表明：在弯曲疲劳时，在相同寿命的条件下，正火后涂层试样比无涂层试样的承载能力提高80MPa左右；当N〈3×10^4时拉-压疲劳时，涂层试样的疲劳强度小于无涂层试样，而N〉3×10^4时拉压疲劳时，则相反；在相同寿命的条件下，涂层试样的弯曲疲劳强度比拉-压疲劳大75MPa左右，而无涂层试样则大25MPa左右。
By means of bend fatigue tests and push-pull fatigue tests, the fatigue strength of Ni base-WC composite coating specimens was compared in different stress states. Under bend-rotation fatigue, fatigue strength of coating specimens was 80 MPa more than that of uncoated specimens in the same fatigue life. Under push-pull fatigue, in N〈3×10^4 , fatigue strength of coating specimens was higher than that of uncoated specimens, but in N〈3×10^4 , it was contrary. The bend-rotation fatigue strength of coatings and uncoated specimens was 75MPa and 25 MPa, respectively, more than the push-pull fatigue strength.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第6期74-76,共3页
Materials For Mechanical Engineering
