Transactions of Materials and Heat Treatment

Title：Influence of heat treatment on friction and wear properties of 18Ni300 maraging steel by SLM

Authors：

Unit：

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ClassificationCode：TG316

year,vol(issue):pagenumber：2022,47(7):228-234

Abstract：

18Ni300 maraging steel was prepared by SLM forming technology, and its aging treatment was carried out. Then, the local high stress friction and wear condition was simulated by ball-disk friction and wear test, and the influences of microstructure and mechanical properties for samples before and after heat treatment on the friction and wear performance were studied. Furthermore, the microstructures of samples before and after heat treatment were observed, the changes in density, hardness, tensile strength and elongation were measured, and the wear area was observed by 3D profilometer and SEM. The results show that after heat treatment, the density of sample remains almost constant, the hardness increases from 37.7 to 54.5 HRC, the tensile strength increases from 1108 to 2028 MPa, the elongation decreases form 14.5% to 4.6%. Before heat treatment, the friction factor of sample is 0.40, and the volume wear rate is 1.87×10-4 mm3·（N·m）-1, while after heat treatment, the friction factor of sample is 0.41, and the volume wear rate is 1.41×10-4 mm3·（N·m）-1. Thus, the abrasive wear and adhesive wear are the main wear mechanism, accompanied by slight oxidation wear.

Funds：

中国国家博士后基金资助项目（2019M653396）；四川省科学技术支持计划（2019JDS0006）；四川大学博士后基金资助项目（2019SCU12056）；泸州市科技计划项目（2021-GYF-2）

作者简介：陈诚（1992-），男，硕士，助教 E-mail：540154684@qq.com

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