激光熔敷制备高速钢涂层
|
摘要
为了利用高速钢的优良性能,拓展其应用范围、降低使用成本,采用同轴送粉激光熔敷技术,在3mm厚的普通用不锈钢侧面制备高硬度的高速钢耐磨涂层,并对熔敷后的试样进行热处理。分析涂层的显微组织,研究热处理制度对涂层显微硬度的影响,测试涂层的耐磨性能。结果表明:涂层热处理前主要为细小等轴晶,组织为淬火马氏体+残留奥氏体+少量碳化物;热处理后主要为回火马氏体+少量残留奥氏体+大量析出碳化物;获得了最佳热处理参数,热处理后涂层硬度大幅度提高,约为基材的2倍;相同磨损条件下,耐磨涂层的磨损失质量仅为基体的1/5。
In order to take advantage of the excellent performance of high speed steel and expand its application area and reduce its cost,high hardness high speed steel wear resistant coating was produced on the side surface of stainless steel with a thickness of 3 mm by the coaxial powder feeding laser cladding technology and then some heat treatment of the samples were carried out. The microstructure of the coatings was analyzed,and the effect of heat treatment on the micro-hardness of the coating was studied. The wear resistance of the coating was tested. The results showed that the microstructure of the coating before heat treatment is small equiaxed grain,and the microstructure of the coating consists of quenched martensite,retained austenite and a small amount of carbides and tempered martensite,a small amount of retained austenite and a large number of precipitated carbides after heat treatment. The best heat treatment parameters were obtained,and the hardness of the coating was greatly improved after heat treatment,which was about 2 times than that of the substrate. The wear loss of the coating was only 1/5 compared to substrate.
In order to take advantage of the excellent performance of high speed steel and expand its application area and reduce its cost,high hardness high speed steel wear resistant coating was produced on the side surface of stainless steel with a thickness of 3 mm by the coaxial powder feeding laser cladding technology and then some heat treatment of the samples were carried out. The microstructure of the coatings was analyzed,and the effect of heat treatment on the micro-hardness of the coating was studied. The wear resistance of the coating was tested. The results showed that the microstructure of the coating before heat treatment is small equiaxed grain,and the microstructure of the coating consists of quenched martensite,retained austenite and a small amount of carbides and tempered martensite,a small amount of retained austenite and a large number of precipitated carbides after heat treatment. The best heat treatment parameters were obtained,and the hardness of the coating was greatly improved after heat treatment,which was about 2 times than that of the substrate. The wear loss of the coating was only 1/5 compared to substrate.
引文
[1]宋学全,刘秀英,赵黎娟.高速钢刀具材料及热处理工艺选择[J].国外金属热处理,2005,26(1):30-33.
[2]邓玉坤,陈景榕,王世章.高速工具钢[M].北京:冶金工业出版社,2002.
[3]邱星武,李刚,邱玲.激光熔敷技术发展现状及展望[J].稀有金属与硬质合金,2008,36(3):54-57.
[4]应小东,李午申,冯灵芝.激光表面改性技术及国内外发展现状[J].焊接,2003(1):5-8.
[5]刘洪喜,冷凝,张晓伟,等.40Cr刀具表面激光熔敷WC/Co50复合涂层的微观组织及其磨损性能[J].红外与激光工程,2016,45(1):1-6.
[6]Steffen Nowotny,Lutz-Michael Berger,Jorg Spatzier.Coatings by Laser Cladding[M].Comprehensive Hard Materisls,2014(1):507-525.
[7]尹燕,栗子林,许广伟,等.3Cr13厨刀碟片激光同轴送粉涂层的显微硬度与组织[J].焊接学报,2016,37(10):85-89.
[8]迟宏宵,马党参,占礼春,等.热处理对高速钢W6Mo5Cr4V3Co8组织和性能的影响[J].材料热处理学报,2012,33(12):105-109.
[9]徐启明,徐和平,陈莉,等.淬火工艺对高速钢韧性的影响[J].工具技术,2015,49(2):24-29.
[10]李戬,童世和.W6Mo5Cr4V2高速钢组织与性能特点分析[J].青海师范大学学报,2007(1):56-58.
[2]邓玉坤,陈景榕,王世章.高速工具钢[M].北京:冶金工业出版社,2002.
[3]邱星武,李刚,邱玲.激光熔敷技术发展现状及展望[J].稀有金属与硬质合金,2008,36(3):54-57.
[4]应小东,李午申,冯灵芝.激光表面改性技术及国内外发展现状[J].焊接,2003(1):5-8.
[5]刘洪喜,冷凝,张晓伟,等.40Cr刀具表面激光熔敷WC/Co50复合涂层的微观组织及其磨损性能[J].红外与激光工程,2016,45(1):1-6.
[6]Steffen Nowotny,Lutz-Michael Berger,Jorg Spatzier.Coatings by Laser Cladding[M].Comprehensive Hard Materisls,2014(1):507-525.
[7]尹燕,栗子林,许广伟,等.3Cr13厨刀碟片激光同轴送粉涂层的显微硬度与组织[J].焊接学报,2016,37(10):85-89.
[8]迟宏宵,马党参,占礼春,等.热处理对高速钢W6Mo5Cr4V3Co8组织和性能的影响[J].材料热处理学报,2012,33(12):105-109.
[9]徐启明,徐和平,陈莉,等.淬火工艺对高速钢韧性的影响[J].工具技术,2015,49(2):24-29.
[10]李戬,童世和.W6Mo5Cr4V2高速钢组织与性能特点分析[J].青海师范大学学报,2007(1):56-58.