热处理温度对窄深槽类零件环保铬镀层组织与性能的影响  

Effect of heat treatment temperature on microstructure and properties of environmentally friendly chromium layer of narrow and deep groove parts

作　　者：洪子康 骆祎岚[1] 朱巧莲 朱世根[1] Hong Zikang;Luo Yilan;Zhu Qiaolian;Zhu Shigen(Engineering Research Center of Advaneed Textile Machinery of the Ministry of Education,College of Mechanical Engineering,Donghua University,Shanghai 201620,China;Yiwu Yunxi New Material Technology Co.,Ltd.,Yiwu Zhejiang 322000,China)

机构地区：[1]东华大学机械工程学院纺织装备教育部工程研究中心,上海201620 [2]义乌云溪新材料科技有限公司,浙江义乌322000

出　　处：《金属热处理》2021年第2期144-148,共5页Heat Treatment of Metals

摘　　要：采用环保三价铬电镀工艺对窄深槽类零件进行电镀铬后,再对铬镀层进行不同温度(0~400℃)的热处理,研究热处理温度对窄深槽类零件环保铬镀层组织和性能的影响,并对热处理前后铬镀层的微观形貌、相结构、显微硬度、结合力和耐磨性进行了分析。结果表明:镀态镀层表面存在微裂纹,经热处理后微裂纹间隙扩大,并且随着温度的升高,镀层结构逐渐由非晶转变为晶态,显微硬度、结合力及耐磨性可得到一定程度的改善。经400℃热处理后铬镀层各项性能表现最佳,显微硬度为781 HV0.1,结合力超过40 N,磨损体积最小为0.0136 mm^(3)。Chromium coating was prepared on narrow and deep groove parts by using environment-friendly trivalent chromium electroplating process,and then heat treated at different temperatures( 0-400 ℃) to investigate the effect of heat treatment temperature on the microstructure and properties of the chromium coating. The micromorphologies,phase structure,microhardness,bonding force and wear resistance of the chromium coating before and after heat treatment were analyzed. The results show that there are micro-cracks on the surface of the as-electroplated coating,and the micro-crack gap expands after the heat treatment. As the heat treatment temperature increases,the structure of the coating gradually changes from amorphous to crystalline,and the microhardness,binding force and wear resistance can be improved. When heat treated at 400 ℃,the microhardness,bonding force and wear resistance are improved,reaching the best value of 781 HV0. 1,over 40 N and the smallest wear volume 0. 0136 mm^(3),respectively.

关 键 词：窄深槽类零件 铬镀层 热处理温度 性能 环保 

分 类 号：TG156[金属学及工艺—热处理]