Microstructure and Wear/corrosion Resistance of Stainless Steel Laser-alloyed with Mn+W_(2)C, Mn+NiWC and Mn+SiC  

作　　者：ZHOU Rui DIAO Xiaogang SUN Yixin 周瑞(School of Metallurgical Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China)

机构地区：[1]School of Metallurgical Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China [2]CITIC Heavy Cast Iron Industry Co.,Ltd.,Luoyang 417039,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2025年第1期283-294,共12页武汉理工大学学报（材料科学英文版）

摘　　要：In-situ formed high Mn steel coating reinforced by carbides was formed by laser surface alloying(LSA).Laser alloyed layers on 1Cr18Ni9Ti steel with Mn+W_(2)C(specimen A),Mn+NiWC(specimen B)and Mn+SiC(specimen C)powders were fabricated to improve the wear and corrosion behavior of 1Cr18Ni9Ti steel blades in high speed mixers.Microstructure evolution,phases,element distribution,microhardness,wear and corrosion behavior of the laser alloyed layers were investigated.Results indicated that high Mn steel matrix composites with undissolved W_(2)C,WC and other in-situ formed carbides were formed by LSA with Mn+W_(2)C and Mn+NiWC while SiC totally dissolved into the high Mn matrix when adding Mn+SiC.Ni as the binding phase in Ni-WC powder decreased the crack sensitivity of the alloyed layer as compared with the addition of W_(2)C powder.An improvement in average microhardness was achieved in the matrix in specimen A,B and C,with the value of 615,602 and 277 HV_(0.5),while that of the substrate was 212 HV_(0.5).The increase of microhardness,wear and corrosion resistance is highly corelated to microstructure,formed phases,type and content of carbides,micro-hardness and toughness of the alloyed layers.

关 键 词：laser surface alloying stainless steel carbide type MICROSTRUCTURE wear and corrosion resistance 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG665[金属学及工艺—金属学]