铸锭工艺对齿轮弯曲疲劳性能影响的试验研究  

Experimental Investigation on Effect of Ingot Processing on Gear Bending Fatigue Performance

作　　者：武忠睿 魏沛堂[1] 陈地发 毛天雨 刘怀举[1] Wu Zhongrui;Wei Peitang;Chen Difa;Mao Tianyu;Liu Huaiju(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《机械传动》2023年第4期98-107,共10页Journal of Mechanical Transmission

基　　金：机械传动国家重点实验室自主研究课题(SKLMT-ZZKT-021Z01)。

摘　　要：当前,表面硬化齿轮存在多种铸锭工艺状态,开展铸锭工艺对齿轮弯曲疲劳性能影响研究,对齿轮抗疲劳精益设计和成本控制有十分重要的意义。对模铸锭、连铸坯和电渣锭18CrNiMo7-6渗碳齿轮开展了表面完整性表征测试,研究了不同铸锭状态齿轮的齿根残余应力、表面粗糙度和硬度差异;基于国家标准GB/T 14230—2021《齿轮弯曲疲劳强度试验方法》,设计了齿轮弯曲疲劳试验方案,对模铸锭、连铸坯和电渣锭18CrNiMo7-6齿轮开展了升降法齿轮弯曲疲劳试验,获取了不同可靠度下的弯曲疲劳极限,探究了铸锭工艺对齿轮弯曲疲劳极限的影响;对3种工艺状态齿轮开展了Locati快速测定法的齿轮弯曲疲劳极限测试,研究了两种试验方法的弯曲疲劳极限结果差异,为我国齿轮疲劳基础数据建设与抗疲劳主动设计提供参考。Ingot processing affects gear fatigue performance,which remains to be studied and becomes an important bottleneck problem limiting gear anti-fatigue design and cost saving.Surface integrity measurements of 18CrNiMo7-6 gears with mold ingots,continuous casting billet and electro-slag ingots are carried out,and tooth root residual stress,surface roughness and hardness gradient of these gears are studied.Based on GB/T 14230—2021 Test method of tooth bending strength for gear load capacity,gear bending fatigue tests are con⁃ducted with the staircase method.The bending fatigue limits under different reliabilities are obtained,and the in⁃fluence of ingot processing on the bending fatigue performance is explored.The gear bending fatigue limit is also evaluated with the effective Locati method,and is compared with results of the lifting method.It provides some references for fundamental data construction of gear fatigue and anti-fatigue design in China.

关 键 词：齿轮弯曲疲劳 铸锭状态 升降测定法 Locati测定法 

分 类 号：TH132.41[机械工程—机械制造及自动化] TF777[冶金工程—钢铁冶金]