摘要
为了解决Cr_(12)MoV钢溶蚀、表面碎裂等问题,利用Al-Ni、Nd-Ni粉末在Cr_(12)MoV钢上进行激光熔覆实验,研究了Al、Nd对镍基覆层的宏微观形貌、组织及表面性能的影响。结果表明:Al可以减少熔覆层裂纹的产生,同时降低覆层硬度,使熔覆层中产生具有减磨作用的硬质相Al_(2)O_(3)等,降低覆层磨损量,14%Al覆层磨损量比2%Al的覆层磨损量低44.5%,Al较优质量分数为14%;Nd的晶粒细化作用明显,显著提升覆层显微硬度,2.5%Nd覆层平均硬度比基体平均硬度高36.8%,Nd较优质量分数为2.5%。
To solve the problems of dissolution and surface fragmentation of Cr_(12)MoV steel,laser cladding experiments were carried out on Cr_(12)MoV steel using Al-Ni and Nd-Ni powders.The effects of Al and Nd on the macro and micro morphology,microstructure and surface properties of nickel base cladding were studied.The results show that Al can reduce the crack generation of cladding layer and reduce the hardness of cladding layer,so that the hard phase Al_(2)O_(3) with anti-wear effect is generated in cladding layer,and the wear amount of cladding layer is reduced.The wear amount of 14%Al cladding layer is 44.5%lower than that of 2%Al cladding layer,and the optimal Al content is 14%.The grain refinement effect of Nd is obvious,and the microhardness of the coating is significantly increased.The average hardness of the coating is 36.8%higher than that of the substrate,and the optimal content of Nd is 2.5%.
作者
王泽达
周后明
朱宇旭
何方佳
向南鑫
王宇豪
Wang Zeda;Zhou Houming;Zhu Yuxu;He Fangjia;Xiang Nanxin;Wang Yuhao(School of Mechanical Engineering,Xiangtan University,Xiangtan,Hunan 411105,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2022年第12期20-26,共7页
High Power Laser and Particle Beams
基金
湖南省省自然科学基金资助项目(2020JJ4585)
湖南省教育厅基金(21A0117)
广东省科技厅(2020B1212060067)。
关键词
激光熔覆
再制造
工艺参数
显微硬度
稀释率
laser cladding
remanufacturing
process parameters
microhardness
dilution rate
作者简介
王泽达,961324616@qq.com。
