YG8硬质颗粒增强镍基合金-WC复合涂层的组织与性能研究
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摘要
采用火焰钎涂法在钢基体上制备了含不同YG8颗粒的镍基合金-WC复合涂层。采用SEM、EDS、HV和HRC等分析测试手段研究了涂层的组织与性能,探讨了YG8对涂层致密性和孔隙率的影响。结果表明,涂层组织中强化相和钎料基体相润湿良好,强化相WC颗粒和YG8颗粒均与钎料基体发生了相互扩散;适量的YG8明显降低了涂层的孔隙率、提高了涂层致密性,从而提高了涂层的硬度;当YG8含量为25%时,涂层组织中WC颗粒显微硬度达最大值,约1988.1HV0.1,钎料基体显微硬度也达最大值,为707.5HV0.1,同时涂层的宏观硬度值也达最大值,为48HRC。因此,在镍基合金-WC复合涂层中添加适量的YG8可明显提高涂层硬度,改善涂层耐磨性能。
To study the effects of YG8 on the micro structure and properties of nickel based alloy-WC composite coatings,nickel based alloy-WC composite coatings with different YG8's were prepared on the steel by means of flame brazing and were analytically tested by SEM,EDS,HV and HRC.With experimental data,the effects of YG8 on density and porosity of the coating were also explored.The results indicated that the WC grains and YG8 on the strengthen-phase had good mutual wetting and mutual diffusion with the solder matrix.The moderate amount of YG8 reduced the porosity of the coating and improve the coating's density,so as to improve the hardness of the coatings.When the YG8 content was 25%,the microhardness of WC reached to maximum,1988.1 HV0.1,the micro hardness of the solder matrix of the coating got to highest,707.5 HV0.1,and the Rockwell hardness of the coating did too,48 HRC.Therefore,the moderate amount of YG8 could markedly increase the hardness of the coatings,and improve the abrasive wear resistance of the coatings.
To study the effects of YG8 on the micro structure and properties of nickel based alloy-WC composite coatings,nickel based alloy-WC composite coatings with different YG8's were prepared on the steel by means of flame brazing and were analytically tested by SEM,EDS,HV and HRC.With experimental data,the effects of YG8 on density and porosity of the coating were also explored.The results indicated that the WC grains and YG8 on the strengthen-phase had good mutual wetting and mutual diffusion with the solder matrix.The moderate amount of YG8 reduced the porosity of the coating and improve the coating's density,so as to improve the hardness of the coatings.When the YG8 content was 25%,the microhardness of WC reached to maximum,1988.1 HV0.1,the micro hardness of the solder matrix of the coating got to highest,707.5 HV0.1,and the Rockwell hardness of the coating did too,48 HRC.Therefore,the moderate amount of YG8 could markedly increase the hardness of the coatings,and improve the abrasive wear resistance of the coatings.
引文
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[14]丁彰雄,陈伟,王群,等.HVOF制备的多峰WC-12Co涂层摩擦磨损特性[J].摩擦学学报,2011,31(5):425-430.
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