Cr_(3)C_(2)-NiCr涂层的制备及其抗高温冲蚀磨损性能  

Preparation and High Temperature Erosion Resistance of Cr_(3)C_(2)-NiCr Coating

作　　者：罗靖川 杨冠军[1] 陈林[1] LUO Jing-chuan;YANG Guan-jun;CHEN Lin(State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学材料科学与工程学院金属材料强度国家重点实验室,陕西西安710049

出　　处：《材料保护》2022年第7期1-7,共7页Materials Protection

摘　　要：垃圾焚烧炉在服役时会面临严重的高温冲刷磨损问题,采用防护涂层是对其施加保护的一种有效方法。为了研究Cr_(3)C_(2)-NiCr涂层在垃圾焚烧炉中高温冲刷环境下的服役表现,采用超音速火焰喷涂技术制备了Cr_(3)C_(2)-NiCr涂层,分析了喷涂距离对涂层微观组织的影响,并考察了涂层的抗高温冲蚀磨损性能。结果表明:随着喷涂距离的增大,涂层表面未熔化的颗粒数量增多,孔隙率也随之提高,当喷涂距离为225 mm时涂层的熔化程度最好。高温冲蚀试验中,制备涂层时选择的喷涂距离增大,涂层的冲蚀率提高,其抗高温冲蚀性能下降;当冲蚀温度从450℃升至550℃时,涂层的抗高温冲蚀能力下降.Waste incinerators are faced with a problem of sever high temperature erosion in service,and applying a protective coating is an effective method to protect them from erosion damage.To research the service performance of Cr_(3)C_(2)-NiCr coatings in the high temperature erosion environment in waste incinerator,Cr_(3)C_(2)-NiCr coatings were prepared using high velocity oxy-fuel spraying,the influence of spraying distance on coatings’microstructure was studied,and the high temperature erosion resistance of coatings was examined.Results indicated that with the increase of spraying distance,both the amount of unmelted particles on the coating surface and the porosity of coating increased.The coating had the highest proportion of melted particles when the spraying distance was 225 mm.In the high temperature erosion test,the erosion rate of coating increased and the high temperature erosion resistance decreased while the spraying distance increased.Besides,the high temperature erosion resistance of coating decreased when the temperature of erosion test increased from 450℃to 550℃.

关 键 词：超音速火焰喷涂 NiCr金属陶瓷涂层 微观组织 抗高温冲蚀性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]