电弧喷涂CuNiIn抗微动磨损涂层性能研究

本文针对CuNiIn合金丝材,采用电弧喷涂工艺制备了CuNiIn涂层,研究了喷涂电压、喷涂距离、雾化气体及压力对CuNiIn涂层性能的影响.实验结果表明：随着喷涂电压（30～35V之间）的增大,涂层结合强度降低,硬度增大;随着雾化气体压力的增大,涂层的结合强度先增大后减小;采用氩气作为雾化气体可有效降低涂层的氧化物含量;采用优化后的喷涂工艺制备的涂层结合强度达到36.0 MPa、HR15Y为49.1、孔隙率为0.8％,涂层在频率10Hz、行程0.1mm、载荷50N实验条件下,20℃时摩擦系数为0.68,450℃时摩擦系数为0.72.

Study on the Properties of Arc Sprayed CuNiIn Coating

The CuNiln coating was prepared by arc spraying in this paper. Effects of spray voltage, spraying distance, atomizing gas and pressure on the properties of CuNiln coating were investigated. The results showed that , with increasing spray voltage （between 30~-35V）, the bonding strength of coatings decreased, while its hardness increased; with increasing atomization gas pressure, the bonding strength of the coating increased initially and then decreased; the oxide content of coatings can be effectively reduced when argon was used as atomization gas; By optimizing the spraying parameters, the bonding strength of coating reaches 36 MPa,its hardness was HR15Y49.1 and porosity was 0.8%.Under the experimental condions that frequency of 10 Hz, stoke of 0.1mm, load of 50N,the coefficient of friction were 0.68 and 0.72 when the temperature were 20℃ and 450℃ respectively.