Microstructure and wear property of hardfacing alloy with nitrogen strengthening  

作　　者：杨可 余圣甫 邓宇 李文婷 周强 徐慧子 

机构地区：[1]College of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074

出　　处：《China Welding》2009年第3期51-54,共4页中国焊接（英文版）

摘　　要：The nitrogen-alloying hardfacing alloy of the martensitic stainless steel was deposited on a low carbon steel substrate using hardfacing flux-cored wire. Microstructure and surface hardness of hardfacing alloy were investigated and measured by optical microscope and microhardness tester. Carbonitrides of the hardfacing alloy were observed by electron probe. The wear behaviour of the hardfacing alloy was studied using the belt abrasion test apparatus and the worn surface was analyzed by scanning electron microscopy. The results showed that carbonitride particles in the hardfacing alloy are complex MX （ M： alloy elements ; X： C, N） precipitate with fine size. These carbonitride particles distributed homogeneously in the hardfacing alloy and had a good strengthening effect on the wear property. The wear property of the hardfacing alloy with nitrogen was better than the one without nitrogen.The nitrogen-alloying hardfacing alloy of the martensitic stainless steel was deposited on a low carbon steel substrate using hardfacing flux-cored wire. Microstructure and surface hardness of hardfacing alloy were investigated and measured by optical microscope and microhardness tester. Carbonitrides of the hardfacing alloy were observed by electron probe. The wear behaviour of the hardfacing alloy was studied using the belt abrasion test apparatus and the worn surface was analyzed by scanning electron microscopy. The results showed that carbonitride particles in the hardfacing alloy are complex MX （ M： alloy elements ; X： C, N） precipitate with fine size. These carbonitride particles distributed homogeneously in the hardfacing alloy and had a good strengthening effect on the wear property. The wear property of the hardfacing alloy with nitrogen was better than the one without nitrogen.

关 键 词：MICROSTRUCTURE wear property CARBONITRIDE hardfacing alloy 

分 类 号：TG42[金属学及工艺—焊接] TF764.1[冶金工程—钢铁冶金]