摘要
针对深氮化硬化32Cr3MoVE钢进行了硬化层组织性能的表征分析。与18CrNi4A钢渗碳件、32Cr3MoVE钢常规氮化件进行了接触疲劳性能对比试验研究,并对深氮化件进行了接触疲劳失效行为分析,认为两种裂纹萌生模式同时存在,但其疲劳破坏取决于表层内裂纹的萌生和扩展。同时探索了深氮化硬化钢长寿命机理:渗氮层深达0.6～0.8mm,渗层组织优异,表面硬度高,具有优异的硬度梯度和残余应力分布。
The microstructure and property of 32Cr3MoVE deep nitrided steel were characterized and analyzed. The contact fatigue experimental study was carried out for 32Cr3MoVE deep nitrided steel and for presenting a striking contrast,we also carried out aimultaneously the same contact fatigue experiment for the 18CrNi4A carburized steel and 32Cr3MoVE conventional nitrided steel. The failure morphology analysis for 32Cr3MoVE deep nitrided steel showed that two modes of fatigue crack formation worked,but the fatigue failure was mainly due to the formation and expansion of subsurface cracks. 32Cr3MoVE deep nitrided steel＇s long-life Mechanism was explored as follows：deep nitriding process leads to a case depth between 0.6mm and 0.8mm,a high surface hardness,superior case microstructure,favorable hardness gradient and excellent distribution of residual compressive stresses.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2010年第2期30-34,共5页
Journal of Aeronautical Materials
关键词
深氮化硬化32Cr3MoVE钢
接触疲劳
渗层组织
硬度梯度
残余应力分布
失效行为
32Cr3MoVE deep nitrided steel
contact fatigue
case microstructure
hardness gradient
distribution of residual compressive stresses
failure modes
