摘要
采用激光相变硬化辅助旋转磁场工艺对45钢进行表面硬化处理,通过对硬化层的显微组织和XRD表征,研究旋转磁场对硬化层显微组织和物相结构的影响。结果表明：外加旋转磁场可降低激光相变硬化过程中的内应力,进而减少显微裂纹的产生,同时能降低马氏体激活能,促使奥氏体转变为马氏体,材料的显微硬度较未施加旋转磁场前提高1.2倍,磨损量仅为未施加磁场时的0.77倍,耐磨性得到显著提高。
Surface laser hardening was carried out on 45 steel assisted by rotating magnetic field. Influences of rotating magnetic field on the microstructure and phase composition were investigated by microscopy and X-ray diffraction,respectively. The experiment results show that the rotating magnetic field can reduce internal stress in the process of laser transformation hardening and crack defects are eliminated mostly.It also lowers martensite activation energy and promotes its phase transformation. The microhardness of the hardened layer is 1. 2 times of that without rotating magnetic field. The wear loss of the laser hardened layer is only about 0. 77 times of that without rotating magnetic field,and the wear resistance of the hardened layer is improved significantly.
作者
黄丽燕
沈俊波
Huang Liyan;Shen Junbo(School of Manufacturing Engineering, Jiangxi Vocational College of Industry ＆ Engineering, Pingxiang Jiangxi 337055, Chin)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第5期128-132,共5页
Heat Treatment of Metals
基金
江西省教育厅科学技术研究项目(GJJ171279)
关键词
45钢
激光相变硬化
显微组织
耐磨性
45 steel
laser transformation hardening
microstructure
wear resistance
