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磁化辅助激光技术改善零部件表面耐磨性能的研究
Research on magnetization assisted laser technology to improve the wear-resisting on the surface of parts
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作 者:邓居军 刘政 吴欣 吴强
DENG Jujun, LIU Zheng, WU Xin, WU Qiang (School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)
机构地区:江西理工大学机电工程学院,江西赣州341000
出 处:《江西理工大学学报》 2015年第36卷第1期 87-92页,共6页
Journal of Jiangxi University of Science and Technology
基 金:江西省教育厅重点科技资助项目(GJJ11021)
摘 要:采用磁化辅助激光淬火和激光熔覆的工艺方法处理表面,通过扫描电子显微镜对比分析复合工艺与单一工艺下的磨面形貌及微观组织。进行表面硬度测试.摩擦磨损试验,探讨磁化效应的影响.结果表明.磁化辅助作用改善了淬硬层表面的裂纹敏感性及犁沟的程度,减轻了熔覆层表面的划痕痕迹,细化了晶粒组织:磁化作用还提高了淬硬层的表面硬度,略微降低了熔覆层的表面硬度.但在磨损失重量上并未得到改善.此外,磁化效应降低了淬硬层和熔覆层的摩擦系数.缩短了淬硬层的磨损跑合期.增加了熔覆层的磨损过程中的复杂性.
Magnetic-assisted laser hardening and laser cladding are used to deal with the sample surface. Investigations of magnetization effect are conducted by comparatively analyzing the grinding surface's morphology and microstructure under the condition of the composite and single technology with the tool of scanning electron to test the surface hardness and friction wear. The result shows that the function of magnetization as auxiliary can improve the crack sensitivity of the hardened surface layer and the furrow's degree, reduce the scratch marks of the cladding surface, and refine the grain organization. The surface hardness of the hardened layer was also increased by magnetization, with the surface hardness of the cladding layer reduced slightly, but the wear weight loss could not be improved. Besides, the coefficient friction of the hardened layer and cladding layer was reduced by it, with the period of the wear running-in shortened, and the complexity of the cladding layer during the wear progression increased.
关键词:激光熔覆 激光淬火 磁化 耐磨性 表面形貌
laser cladding ; laser quenching ; magnetization ; wear resistance ; surface morphology ;
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