【作者】 汤卉； 王佳； 赵元；

【Author】 TANG Hui WANG Jia ZHAO Yuan (School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China)

【机构】 哈尔滨理工大学材料科学与工程学院；

【摘要】 为解决直升机传动系中钢质零件表面腐蚀、磨损问题,利用电镀工艺中的镀硬铬技术,采用不同镀铬液配方,优选三组温度、电流密度工艺参数,制得镀铬试样,利用X射线(XRD)、扫描电镜(SEM)等表征方式,研究试件镀层的微结构及成分,经测试铬层晶型结构为体心立方,晶型稳定,并对不同试件的硬度、厚度、耐蚀性、抗摩擦、氢脆性等性能进行检测,研究镀硬铬工艺参数对钢基镀铬层微结构与耐蚀性、摩擦磨损性能的影响。研究结果表明:电流密度为45～50A/A/dm~2,温度为58～60℃时,钢基获得的镀层性能最佳,镀层硬度及厚度高,孔隙率低,镀层光亮,耐蚀性、抗摩擦性能俱佳。更多还原

【Abstract】 To solve the problem about the surface corrosion and wear of steel parts in the transmission system of helicopter,based on chromium plating technology of plating process,the chromium plating samples were prepared with three better groups of temperature and current density by means of different formula of chromium plating bath.The X-ray diffraction(XRD) and scanning electron microscopy(SEM) were used to study the microstructure and composition of specimen coating.The experimental results show that the crystalline structure of chromium layer is body centered cubic and the crystal is stable,the performances from different specimens including rigidity,thickness,corrosion resistance,antifriction and hydrogen brittleness were tested,the effect of hard chromium plating technology parameter(T,I) on microstructure and properties of steel-based chromium plating was also investigated.The result indicates that:45～50A/dm~2 current density and 58～60℃temperature of plating coat are optimal condition for obtaining higher brightness,rigidity and thickness,lower porosity,better corrosion resistance and antifriction.更多还原