粉煤灰活性氩弧熔覆Fe_xAlCoCrCuTi_(0.4)高熵合金涂层的组织和冲蚀磨损性能  

Microstructure and Erosion Wear Resistance of Fe_xAlCoCrCuTi_(0.4) High Entropy Alloy Coating Prepared by Activating Argon Arc Cladding of Fly Ash

作　　者：董世知[1] 孟旭 马壮[1,2] 赵越超[3] DONG Shi-zhi;MENG Xu;MA Zhuang;ZHAO Yue-chao(College of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,China;Institute of Metallurgical Engineering,Liaoning Institute of Science and Technology,Benxi 117300,China;College of Engineering,Yantai Nanshan University,Longkou 265713,China)

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [2]辽宁科技学院冶金工程学院,辽宁本溪117300 [3]烟台南山学院工学院,山东龙口265713

出　　处：《材料保护》2018年第8期90-94,共5页Materials Protection

摘　　要：目前,鲜见利用活性氩弧熔覆技术制备高熵合金涂层的报道,采用粉煤灰活性氩弧熔覆工艺在Q235钢表面制备了Fe_xAlCoCrCuTi_(0.4)(x=0,1)高熵合金涂层,观察了涂层截面形貌,分析了显微组织和相结构,并对其硬度、冲蚀磨损性能进行了研究。结果表明:Fe_xAlCoCrCuTi_(0.4)高熵合金涂层表面无气孔、裂纹等缺陷,活性剂的加入增大了基体对涂层的稀释作用,使涂层与基体呈良好的冶金结合,活性剂可有效增大熔池深宽比,有利于涂层更好的成形;涂层均是由BCC和FCC相构成,由于活性剂用量少,并没有其他复杂物质生成; x=1时,由于Fe元素含量较多,增强了固溶强化效果,提高了涂层的硬度和耐冲蚀性能,使涂层硬度最高可达495.6 HV2 N,冲蚀磨损性能可达基体的4.98倍。FexAlCoCrCuTi0.4（x = 0,1 ）high entropy alloy coating was prepared on the surface of Q235 steel by activating argon arc cladding of fly ash. The cross-section morphology of the coating was observed, and the microstructure and phase structure were analyzed. Moreover, the hardness and erosion resistance of the coating were also studied. Results indicated that the prepared coatings did not have pores, cracks or other defects. The addition of activating flux effectively increased the dilution effect of matrix on the coating, which was beneficial for the metallurgi- ca! bonding and the coating forming. The coating consisted of BCC and FCC phase, and no other complex substances were formed due to the small amount of activating flux. When x = 1, the solid solution strengthening effect was enhanced due to the more Fe content, and meantime the hardness and erosion resistance of the coating were improved, with the maximum hardness up to 495.6 HV2 N, and the erosion wear resistance was 4.98 times as high as the matrix.

关 键 词：活性氩弧熔覆 粉煤灰 高熵合金 硬度 冲蚀磨损性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]