20CrNiMo材料的强度试验与可靠性评价  

STRENGTH TEST AND RELIABILITY EVALUATION OF 20CRNIMO MATERIAL

作　　者：郭玉梁 魏冰阳[1] 古德万 王永强 曹雪梅[1] GUO YuLiang;WEI BingYang;GU DeWan;WANG YongQiang;CAO XueMei(School of Mechanical and Electronic Engineering,Henan University of Science and Technology,Luoyang 471003,China)

机构地区：[1]河南科技大学机电工程学院,洛阳471003

出　　处：《机械强度》2023年第1期60-67,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51875174);河南省自然科学基金项目(182300410225)资助。

摘　　要：低碳合金钢20CrNiMo是高质量齿轮常用的一种高强度表面硬化材料,经表面渗氮、渗碳或碳氮共渗淬火处理后有很好的齿面硬度和齿根韧性。依据有关国家标准,设计加工了若干材料试棒,完成了材料试棒的抗拉强度和拉伸疲劳强度试验。利用对数正态分布和双参数威布尔分布对试验数据进行了拟合与检验,由概率分布函数计算得到了不同置信度下的材料R-S-N曲线。材料疲劳寿命数据更符合对数正态分布。Low carbon alloy steel 20CrNiMo is a kind of high strength surface hardening material which was commonly used as high-quality gears. After surface nitriding, carburizing or carbonitriding quenching treatment, it has good tooth surface hardness and tooth root toughness. According to the relevant national standards, a number of material test bars had been designed and carried out, the tensile strength and tensile fatigue strength date of material had been obtained. The lognormal distribution and two parameters Weibull distribution were used to fit and test the testing data, and the R-S-N curves of materials with the different confidence levels were obtained by calculating the probability distribution function. The fatigue life data of the material was more suitable for the lognormal distribution.

关 键 词：20CrNiMo 疲劳试验 R-S-N曲线 数据处理 

分 类 号：TG113.2[金属学及工艺—物理冶金]