摘要
为改善304不锈钢的摩擦学性能,分别以A熔覆层20%Ni-48%Mo-32%Si,B熔覆层30%Ni-42%Mo-28%Si(质量分数)混合粉末为原料,在304不锈钢表面利用激光熔覆技术制备复合熔覆层,分别利用XRD、SEM和摩擦磨损试验机分析了熔覆层的物相、显微组织结构及室温下的摩擦学性能。结果表明:复合熔覆层和基体冶金结合良好,仅存在部分裂纹。Mo5Si3、MoSi2是复合熔覆层的主要物相,A熔覆层显微硬度(1060.1 HV0.5)和B熔覆层显微硬度(725.9 HV0.5)均明显高于基体(257.2 HV0.5),A复合熔覆层的磨损率和摩擦因数最低。
In order to improve the tribological properties of 304 stainless steel,two coatings with different composition were prepared on the surface of 304 stainless steel by laser cladding,in which coating A was 20%Ni-48%Mo-32%Si and coating B was 30%Ni-42%Mo-28%Si(mass fraction).The phase composition,microstructure,and tribological properties at room temperature were analyzed by means of XRD,SEM and friction abrasion testing machine.The results show that both coatings have good metallurgical bonding with the matrix,but with some cracks.Both composite coating A and B mainly consist of Mo5 Si3 and MoSi2,the microhardness of the coating A(1060.1 HV0.5)and coating B(725.9 HV0.5)is obviously higher than that of the matrix(257.2 HV0.5).The wear rate and friction coefficient of the layer A is lowest.
作者
刘东华
周康宁
周劲松
张彬娟
谌磊
柯金
刘秀波
Liu Donghua;Zhou Kangning;Zhou Jinsong;Zhang Binjuan;Chen Lei;Ke Jin;Liu Xiubo(Hunan Research Institute of Metallurgy and Materials Co.,Ltd.,Changsha Hunan 410129,China;Hunan Province Key Laboratory of Materials Surface/Interface Science and Technology,Central South University of Forestry and Technology,Changsha Hunan 410004,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第3期30-34,共5页
Heat Treatment of Metals
基金
长沙市科技计划项目(kq1901134)。
