激光熔覆Ni3Al/Cr3C2复合材料耐磨性能研究  

Wear Resistance of Laser Cladding Ni3Al/Cr3C2 Composites

作　　者：陈翠欣[1] 赵向东 方前 赵琳[3] 韩伟[3] 彭云[3] 殷福星[2] 田志凌[3] Chen Cuixin;Zhao Xiangdong;Fang Qian;Zhao Lin;Han Wei;Peng Yun;Yin Fuxing;Tian Zhiling(Hebei University of Technology,Tianjin 300310,China;Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]河北工业大学材料学院,天津300310 [2]河北工业大学,天津300310 [3]钢铁研究总院,北京100081

出　　处：《稀有金属材料与工程》2020年第4期1388-1394,共7页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2017YFB1103300);国际科技合作项目(2015DFA50970);河北工业大学联合培养博士研究生项目(2018GN0003)。

摘　　要：采用激光熔覆技术在304不锈钢基板上制备了Ni3Al合金和Ni3Al/Cr3C2(25%,质量分数)复合材料耐磨涂层,分析了Ni3Al合金和Ni3Al/Cr3C2熔覆层的显微组织、硬度和耐磨性能。结果表明,Ni3Al/Cr3C2熔覆层显微组织由基体γ’-Ni3Al相和原位自生M7C3(M=Cr,Fe)型碳化物组成,且细小M7C3弥散分布于γ’-Ni3Al基体。与Ni3Al合金熔覆层相比较,Ni3Al/Cr3C2熔覆层显微硬度提高了约4000 MPa。650℃时,Ni3Al/Cr3C2熔覆层磨损量仅为对比材料蠕墨铸铁的28%左右,表明Ni3Al/Cr3C2复合材料熔覆层具有良好的耐磨性能。The wear resistant coatings of Ni3Al alloy and Ni3Al/Cr3C2 composites were prepared on 304 stainless steel substrates by laser cladding.The microstructure,hardness and wear resistance of Ni3Al alloy and Ni3Al/Cr3C2 composites were investigated.The results indicate that the microstructure of the Ni3Al/Cr3C2 cladding layer consists of matrixγ’-Ni3Al phase and in-situ self-generated M7C3(M=Cr,Fe)type carbides,and the fine M7C3 carbides distribute homogeneously inγ’-Ni3Al matrix.Compared with that of the Ni3Al alloy cladding material,the micro-hardness of the Ni3Al/Cr3C2 cladding material is increased by about 4000 MPa,and its mass loss is only 28%of that of the vermicular graphite cast iron at 650℃.Therefore,the Ni3Al/Cr3C2 laser cladding composite shows excellent wear resistance.

关 键 词：激光熔覆 Ni3Al/Cr3C2复合材料 显微组织 M7C3 耐磨性能 

分 类 号：TB333[一般工业技术—材料科学与工程]