40Cr基体温度对激光熔覆Cr18Ni8Mo2Si的影响Effects of the Substrate Temperature on Microstructure and Properties of Laser Cladding Cr18Ni8Mo2Si on 40Cr
许明三;江吉彬;张宁;陈昌荣;钟文彬;
摘要(Abstract):
通过选择基体预热温度、激光功率、扫描速度、光斑直径为影响因素,用正交试验方法在40Cr基体上进行熔覆Cr18Ni8Mo2Si研究;通过测试残余应力、显微硬度和观察金相组织等研究熔覆基体温度对熔覆层质量的影响,经研究随着预热温度的上升,残余应力减小,最小的残余应力参数组合为预热温度400℃、激光功率1 200 W、扫描速度4 mm·s-1、光斑直径3 mm;随着预热温度的提高,从显微组织看,组织缺陷减少,结合效果变好;熔覆层显微硬度也随着预热温度的提高而明显增大.
关键词(KeyWords): 激光熔覆;基体温度;残余应力;显微组织;显微硬度
基金项目(Foundation): 国家自然科学基金资助项目(51575110、51305079);; 福建省自然科学基金资助项目(2015J01628、2015J01181、2016J01202);; 福建省教育厅产学研专项(JA14211);; 福建省经信委2015年省级企业技术改造专项;; 福建省科技计划资助项目(2017H0002)
作者(Authors): 许明三;江吉彬;张宁;陈昌荣;钟文彬;
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