Cr_(3)C_(2)质量浓度对Co-Cr_(3)C_(2)复合镀层微观结构及耐磨性的影响  

Effect of Cr_(3)C_(2)concentration on microstructure and wear resistance of electroplated Co-Cr_(3)C_(2)composite coating

作　　者：陈翀宇 卓健飞 谢新 汪镇涛 何雨波 王帅星[1] 杜楠[1] CHEN Chongyu;ZHUO Jianfei;XIE Xin;WANG Zhentao;HE Yubo;WANG Shuaixing;DU Nan(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;AECC Changjiang Engine Company Ltd.,Yueyang 414001,China)

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]中国航发长江动力有限公司,湖南岳阳414001

出　　处：《电镀与涂饰》2024年第8期18-26,共9页Electroplating & Finishing

基　　金：中国航空发动机集团产学研合作项目(HFZL2020CXY026)。

摘　　要：[目的]研究Cr_(3)C_(2)颗粒质量浓度对Co-Cr_(3)C_(2)复合镀层结构及耐磨性的影响,以确定其最佳用量,提升Co-Cr_(3)C_(2)复合镀层的耐磨性。[方法]在镀钴溶液中加入不同质量分数的Cr_(3)C_(2)颗粒,采用电沉积法在GH4169合金表面制备Co-Cr_(3)C_(2)复合镀层,通过扫描电子显微镜、能谱仪、显微硬度计及材料表面性能综合测试仪分析了不同颗粒添加量时所得Co-Cr_(3)C_(2)复合镀层的微观形貌、颗粒复合量、显微硬度及摩擦学性能。[结果]随着镀液中Cr_(3)C_(2)质量浓度的增大,Co-Cr_(3)C_(2)复合镀层的颗粒分布均匀性得到改善,颗粒复合量和显微硬度增大,但Cr_(3)C_(2)颗粒过量时会给复合镀层带来负面影响。Cr_(3)C_(2)质量浓度为70 g/L时,镀层中Cr_(3)C_(2)颗粒复合量达到最高的33.49%,截面显微硬度为626 HV.01,耐磨性最佳。Co-Cr_(3)C_(2)复合镀层主要发生磨粒磨损及轻微的粘着磨损。[结论]镀液中Cr_(3)C_(2)颗粒浓度显著影响着Co-Cr_(3)C_(2)复合镀层的结构和耐磨性,较佳的Cr_(3)C_(2)颗粒添加量为70 g/L。[Introduction]The effect of Cr_(3)C_(2)particle dosage on the microstructure and wear resistance of Co-Cr_(3)C_(2)composite coatings was studied to determine the optimal dosage of Cr_(3)C_(2)particles to improve the wear resistance of Co-Cr_(3)C_(2)composite coating.[Method]Co-Cr_(3)C_(2)composite coatings were prepared on GH4169 alloy surface by electrodeposition in a cobalt-based plating bath with different dosages of Cr_(3)C_(2)particles.The microstructure,particle content,microhardness,and tribological properties of Co-Cr_(3)C_(2)composite coatings electrodeposited with different Cr_(3)C_(2)dosages were examined by using scanning electron microscope(SEM),energy-dispersive spectrometer(EDS),microhardness tester,and material surface property comprehensive tester,respectively.[Result]With the increasing of Cr_(3)C_(2)particle dosage in the plating bath,the distribution uniformity of Cr_(3)C_(2)particles in Co-Cr_(3)C_(2)composite coating was improved,and the particle content and microhardness of the composite coating was increased.However,the excessive addition of Cr_(3)C_(2)particles brought negative effects to the Co-Cr_(3)C_(2)composite coating.The Co-Cr_(3)C_(2)composite coating electrodeposited with 70 g/L of Cr_(3)C_(2)particle in the plating bath featured the highest volume fraction of Cr_(3)C_(2)(up to 33.49%),a cross-section microhardness of 626 HV0.1,and the best wear resistance.The Co-Cr_(3)C_(2)composite coatings primarily underwent abrasive wear and minor adhesive wear during friction and wear test.[Conclusion]The dosage of Cr_(3)C_(2)particles in the plating bath significantly affects the microstructure and wear resistance of Co-Cr_(3)C_(2)composite coating.The suitable dosage of Cr_(3)C_(2)particles is 70 g/L.

关 键 词：钴 碳化铬 复合电沉积 组织结构 耐磨性 成分 

分 类 号：TQ153.2[化学工程—电化学工业]