摘要
等离子喷涂Ni60涂层因为其优异的耐磨性能和力学性能,广泛应用在机械装备等领域,而粉末粒径是影响等离子喷涂涂层结构和性能的主要因素之一.采用不同粒径分布的Ni60粉末,通过真空等离子体喷涂工艺,在A30不锈钢基体上制备粗化、硬化的镍涂层,研究粉末粒径与涂层表面粗糙度、显微硬度、结合强度和耐磨性能间的关系.结果表明:通过调控粉末粒径从78μm增加到319μm,Ni60涂层表面的粗糙度从18μm增加到30μm;采用平均粒径为164μm的Ni60粉末制备的涂层,其表面粗糙度达到~28μm,经过三周砂纸往复摩擦后粗糙度仍可保持在20μm,显微硬度达到678 Hv(300 g),涂层结合强度高达到53 MPa,综合性能优异.
Plasma sprayed Ni60 coating is widely used in the field of mechanical equipment because of its excellent wear resistance and mechanical properties.Powder particle size is one of the main factors affecting the structure and performance of the coating.In this study,Ni60 powder with different particle size distribution was used to prepare coarsened and hardened nickel coating on A30 stainless steel substrate by vacuum plasma spraying.The relationship between the particle size and the surface roughness,microhardness,bonding strength,wear resistance of the coating was studied.The results show that the surface roughness of the coating increases from^18μm to^30μm by adjusting the particle size from 78μm to 319μm.The surface roughness of the coating prepared by Ni60(164μm)powder reaches 28μm.The roughness can still be maintained at 20μm after three weeks of reciprocating friction.The microhardness reaches 678 HV(300).The bonding strength is as high as 53 MPa.The comprehensive performance is excellent.
作者
张玉桧
谢迎春
况敏
陈换涛
张忠诚
王昊
ZHANG Yuhui;XIE Yingchun;KUANG Min;ZHANG Zhongcheng;WANG Hao(Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510650,China)
出处
《材料研究与应用》
CAS
2020年第4期288-293,共6页
Materials Research and Application
作者简介
张玉桧(1993-),女,黑龙江哈尔滨人,硕士,助理工程师,主要从事利用场发射扫描电镜的功能,为纳米材料(喷涂涂层、镀膜膜层)的研究提供可靠的实验手段.对不同热喷涂层、真空镀膜进行微区观察,结合EDS、EBSD对高性能涂镀层的微观成分及晶体结构进行标定的研究.
