摘要
采用激光熔覆技术将镍基合金熔覆在65 Mn钢表面,以正交试验为试验法,找到熔覆层质量最优的工艺参数组合。通过扫描电子显微镜、X射线衍射仪和显微硬度计测试了表面涂层的微观结构、物相组成和显微硬度。并对其摩擦磨损性能进行了试验。通过试验结果可知,熔覆层组织与钢基体的冶金结合界面良好,枝晶、柱状晶为主要显微组织。最优参数组合下的熔覆层的显微硬度为957 Hv0.1,是基体硬度的4倍。熔覆层的摩擦系数较小在0.54~0.7之间,摩擦系数稳定,同样的条件下,对比熔覆层与基体磨损量,其比值为1.0/3.5。由此比值可知,熔覆层具备的耐磨性明显更高。
Nickel-based alloy cladding layer was prepared on 65 Mn steel by laser cladding technology.The optimum technological parameters were determined by orthogonal test.The microstructure,phase composition and microhardness of the cladding layer were investigated by scanning electron microscopy,X-ray diffraction and microhardness tester.The friction and wear properties of the cladding layer were studied by friction and wear tester.The results showed that the cladding layer had good metallurgical bonding with the matrix,and the microstructure was dendritic,columnar and cellular.The average microhardness of the cladding layer was 957 Hv 0.1,which was 4 times of that of the matrix.The friction coefficient of the cladding layer was between 0.54 and 0.7,which was small and stable.Under the same conditions,the wear amount of the cladding layer was 1.0/3.5 of that of the matrix.Compared with 65 Mn steel matrix,the cladding layer had better wear resistance.
作者
闫勇
王宏立
Yan Yong;Wang Hongli(College of Engineering,Heilongjiang Bayi Agricultural University,Daqing 163319)
出处
《黑龙江八一农垦大学学报》
2020年第1期78-82,108,共6页
journal of heilongjiang bayi agricultural university
基金
黑龙江省自然科学基金优秀青年项目（YQ2019E032）
黑龙江八一农垦大学“杂粮生产与加工”项目
关键词
65
Mn钢
激光熔覆
微观组织
摩擦磨损
65 Mn steel
laser cladding
microstructure
friction and wear
