摘要
采用爆炸喷涂技术在GCr15轴承钢表面制备一层WC涂层,通过疲劳试验研究了爆炸喷涂后轴承钢的抗疲劳性能,并与未喷涂轴承钢进行对比。结果表明:爆炸喷涂后GCr15轴承钢的疲劳寿命缩短、抗疲劳性能降低;未喷涂轴承钢的疲劳裂纹源为其表面因机械加工产生的微小划痕、非金属夹杂物以及晶体滑移带,爆炸喷涂后轴承钢的疲劳裂纹源为WC涂层中的孔状缺陷和界面附近轴承钢中的非金属夹杂物。
A layer of WC coating was coated on the surface of GCr15 bearing steel by explosion spraying technique. The fatigue resistance of the bearing steel after explosion spraying was studied by fatigue tests and compared with that of bearing steel without explosion spraying. The results show that the fatigue resistance and fatigue life of GCr15 bearing steel decreased after explosion spraying. The fatigue cracks of the bearing steel without explosion spraying mainly originated from the surface machining tiny scratches, non-metallic inclusions and crystal slip belts. The fatigue cracks of the bearing steel after explosion spraying mainly originated from the cavity defects in the WC layer or non-metallic inclusions in the bearing steel near the interface.
出处
《机械工程材料》
CAS
CSCD
北大核心
2018年第2期74-77,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(51175298)
湖北省高等学校优秀中青年科技创新团队计划项目(T201607)
关键词
爆炸喷涂
轴承钢
抗疲劳性能
WC涂层
explosion spraying
bearing steel
fatigue resistance
WC coating
