摘要
采用金相分析、X射线衍射分析、显微硬度测量、摩擦磨损试验和抗氧化性能试验等手段,研究了离子渗氮温度对DC53钢渗氮层组织和性能的影响。结果表明：随离子渗氮温度升高,渗氮层中的ε相（Fe3N）衍射峰逐渐降低,γ＇相（Fe4N）衍射峰呈逐渐升高的趋势,α-Fe相衍射峰则显著降低。渗氮层厚度、硬度和耐磨性均不断增加,且从表面到基体随深度的增加,渗氮层呈平缓的硬度梯度分布。渗氮层厚度与渗氮温度满足表达式ξ~2=3.6×10~7·e^（-6855/T）·τ。这是由于在较高的离子渗氮温度下氮元素扩散系数增加并形成的大量氮化物引起的弥散强化作用所致。
Effect of ion nitriding temperature on microstructure and properties of nitrided layer on DC53 steel were investigated by means of metallographic analysis,X-ray diffraction analysis,microhardness measurement,friction and wear test and oxidation resistance test. The results show that with the increase of ion nitriding temperature,the diffraction peak of ε phase（ Fe3 N） in nitrided layer decreases gradually,the diffraction peak of γ＇ phase（ Fe4 N） increases gradually,and the diffraction peak of α-Fe phase decreases significantly. Also,the thickness,hardness and the wear resistance of nitrided layer increases continuously with the increase of ion nitriding temperature. In addition,the nitrided layer shows a gentle hardness gradient distribution with the increase of depth from the surface to the substrate,and the nitride depth and nitride temperature satisfy the expression： ξ~2= 3. 6 × 10~7·e^（-6855/T）·τ. This is due to the dispersion strengthening caused by the increase of the nitrogen diffusion coefficient and the formation of a large number of nitrides at higher ion nitriding temperature.
作者
付柯焴
王守晶
潘明明
黄悦
刘爽
Fu Keyu;Wang Shoujing;Pan Mingming;Huang Yue;Liu Shuang(Metal Materials Engineering,Liaoning Shihua University,Fushun Liaoning 113001,China;Department of Mechanical Engineering,Liaoning Vocational College of Rail Transport,Shenyang Liaoning 110023,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第9期118-122,共5页
Heat Treatment of Metals
基金
辽宁省大学生创新训练计划项目(201610148023)
关键词
DC53钢
离子渗氮
渗氮温度
显微组织
性能
DC53 steel
ion nitriding
nitriding temperature
microstructure
properties
