摘要
为了研究热胀工艺对20Cr2Ni4A渗碳齿轮钢力学性能及显微组织的影响,对齿轮钢进行热胀处理并去掉原有渗碳层再重新渗碳,利用扫描电子显微镜(Scanning Electron Microscope,SEM)、X射线应力测试仪、多功能表面性能测量仪,分别测量和对比分析了试样热胀处理前后晶粒尺寸和表面形貌、残余奥氏体含量和残余应力显微硬度以及摩擦学性能。结果表明:热胀后晶粒尺寸增大,表面残余奥氏体含量增加,表面显微硬度、耐磨性能提高,表面残余应力值减小。这些参量的变化说明热胀工艺对20Cr2Ni4A渗碳齿轮钢的力学性能和显微组织有较大的改变,为后续研究热胀工艺对接触疲劳寿命优劣的分析提供实验依据。
In order to study the effect of thermal expansion technology on 20Cr2Ni4 A carburized gear steel mechanical properties and microstructure and remove the original carburized layer and carburize again the gear steel after thermal treatment,using Scanning Electron Microscope( SEM),X-ray stress tester and multifunctional surface properties measuring instrument,the sample grain size,surface topography,residual stress and residual austenite content,micro-hardness and surface roughness are measured and compared before and after treatment. The results show that the grain size refinement,the residual austenite content,the surface roughness value,and the surface micro-hardness increase significantly,the residual stress decrease obviously. The changes of these parameters show that the thermal expansion technology impacts markedly on 20Cr2Ni4 A carburized gear steel mechanical properties and microstructure,which provides experimental basis for study of the thermal expansion technology on contact fatigue life.
出处
《装甲兵工程学院学报》
2016年第6期113-116,共4页
Journal of Academy of Armored Force Engineering
基金
国家自然科学基金资助项目(51405510)
关键词
热胀工艺
渗碳齿轮钢
耐磨性能
显微硬度
thermal expansion technology
carburized gear steel
wear-resisting
micro-hardness
