粉末粒度对超音速火焰喷涂WC-10Co4Cr涂层性能的影响  

Influence of Powder Size on Properties of HVOF Sprayed WC-10Co4Cr Coating

作　　者：张欢欢[1] 易俊兰 郭孟秋[1] 秦锐 王长亮[1] ZHANG Huan-huan;YI Jun-lan;GUO Meng-qiu;QIN Rui;WANG Chang-liang(Beijing Institute of Aeronautical Materials,Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Materials,Beijing 100095,China;Shanghai aircraft Manufacturing Company Ltd.,Shanghai 200436,China)

机构地区：[1]北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095 [2]上海飞机制造有限公司,上海200436

出　　处：《热喷涂技术》2016年第3期36-42,共7页Thermal Spray Technology

摘　　要：采用超音速火焰喷涂工艺对两种不同粒度范围的WC-10Co4Cr粉末进行了涂层制备,分析了粉末粒度对喷涂涂层的微观组织、相结构、磨粒磨损及电化学腐蚀性能的影响。结果表明,粉末粒度较小时沉积的涂层结构致密、孔隙率低,具有较好的抗磨粒磨损性能和耐腐蚀性能。通过进一步粉末粒度的优选,获得了显微硬度大于1300HV0.3、孔隙率小于0.1%、结合强度90MPa、中性盐雾性能超过500h的WC-10Co4Cr耐磨防腐涂层。Two type coatings were prepared using WC-10Co4Cr powders with different powder size distributionby High Velocity Oxygen Fuel(HVOF)spray process.The influence of powder size on the coating microstructure,phase structure,abrasion and corrosion behavior was analyzed.The results showed that the coating prepared usingsmaller powder have higher quality in porosity,wear resistance and corrosion resistance.After optimization ofpowder size distribution,the porosity of coating can be lower than0.1%,as well as the coating can pass500hneutral salt fog testing.

关 键 词：超音速火焰喷涂 WC-10Co4Cr 粒度分布 孔隙率 抗腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]