渗碳18CrNiMo7-6钢表面的喷射强化

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL

International Journal of Surface Science and Engineering Pub Date : 2020-03-10 DOI:10.1504/ijsurfse.2020.10027545

Yongtao Ma, Lundun Zhang, Jiancheng Liu, Lanrong Liu

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引用次数: 1

摘要

压缩残余应力场（CRSF）可以提高机械加工零件的疲劳寿命。喷射水喷丸是一种在表层产生压残余应力的新方法。对渗碳后的18CrNiMo7-6齿轮钢在不同条件下进行了喷丸试验。主要变量包括压力、喷嘴速度和间隔距离。表面硬度从原来的56.3 HRC提高到63.4 HRC。在150μm的深度处，最大残余应力达到−1240 MPa。结果还表明，压力对CRSF的影响最为显著。金相照片显示，亚表层晶粒尺寸细化，由于喷丸处理而发生相变。研究还发现，喷丸处理对平均表面粗糙度有相反的影响，这表明水射流在精加工过程中发挥了新的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Injection water jet peening of carburised 18CrNiMo7-6 steel surfaces

A compressive residual stress field (CRSF) can improve the fatigue life of machined parts. Injection water jet peening is a new way of inducing compressive residual stress in the surface layer. A carburised 18CrNiMo7-6 gear steel was tested using injection peening under different conditions. The main variables included pressure, nozzle velocity and stand-off distance. The surface hardness was improved up to 63.4 HRC from its original hardness of 56.3 HRC. The maximum residual stress reached −1,240 MPa at a depth of 150 μm. The results also showed that pressure has the most dominant effect on the CRSF. Metallographic photos showed that the grain size was refined in the subsurface layer, a phase change having occurred because of the peening. It was also found that the average surface roughness was inversely influenced by peening, suggesting a new role for water jets in the finishing process.

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来源期刊

International Journal of Surface Science and Engineering 工程技术-材料科学：膜

CiteScore

1.60

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： IJSurfSE publishes refereed quality papers in the broad field of surface science and engineering including tribology, but with a special emphasis on the research and development in friction, wear, coatings and surface modification processes such as surface treatment, cladding, machining, polishing and grinding, across multiple scales from nanoscopic to macroscopic dimensions. High-integrity and high-performance surfaces of components have become a central research area in the professional community whose aim is to develop highly reliable ultra-precision devices.