模具钢的激光抛光表面处理及其耐腐蚀性研究
Study on Laser Polishing Surface Treatment of Die Steel and Its Corrosion Resistance
DOI: 10.12677/MET.2023.123035, PDF,   
作者: 罗育银*, 段周波：深圳市创世纪机械有限公司，广东 深圳；周 浩：湘潭大学机械工程学院，湖南 湘潭
关键词: S136D模具钢；激光抛光；微观结构；微观硬度；残余应力；耐腐蚀性；S136D Die Steel； Laser Polishing； Microstructure； Microhardness； Residual Stress； Corrosion Resistance
摘要: 模具钢的表面质量以及机械性能对航空航天产品的使用寿命以及应用范围具有重要影响。为了提高抛光效率，采用激光抛光技术对S136D模具钢表面进行抛光，提高其表面质量。对不同能量密度下抛光样品截面的微观结构、微观硬度、杨氏模量、表面物相组成、残余应力以及耐磨性进行了表征与分析。此外，结合连续激光以及脉冲激光研究了双束激光抛光对样品的表面物相、残余应力以及耐腐蚀性的影响。研究结果表明，激光抛光后样品抛光层的微观结构更加致密，且经过能量密度为1500 J/cm2和3000 J/cm2抛光后样品表面的微观硬度以及杨氏模量有一定的增加。激光抛光后样品表面的残余应力随能量密度的增加而增加。经过激光抛光后样品表面的耐腐蚀性能明显增强，而且双束激光抛光后的样品表面具有更好的耐腐蚀性能。
Abstract: The surface quality and mechanical properties of die steel have an important influence on the ser-vice life and application range of aerospace products. In order to improve the polishing efficiency, laser polishing technology was used to polish S136D die steel to improve its surface quality. The microstructure, microhardness, Young’s modulus, phase composition, residual stress and wear re-sistance of samples polished by different energy densities were analyzed in detail. In addition, the effects of dual laser polishing combined with continuous laser and pulsed laser on the surface phase, residual stress and corrosion resistance of the samples were also investigated. The results show that the microstructure of the polished layer of samples after laser polishing with laser energy den-sity of 1500 J/cm2 and 3000 J/cm2 is more compact, and the microhardness and Young’s modulus of the sample surface are increased. The residual stress on the surface of the sample after laser pol-ishing increases with energy density. The corrosion resistance of the sample surface after laser pol-ishing is significantly increased, and the after dual beam laser polished sample surface has the best corrosion resistance.
文章引用：罗育银, 段周波, 周浩. 模具钢的激光抛光表面处理及其耐腐蚀性研究[J]. 机械工程与技术, 2023, 12(3): 310-317. https://doi.org/10.12677/MET.2023.123035

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