激光技术Issue(2)：240-245,6.DOI:10.7510/jgjs.issn.1001-3806.2014.02.020
不锈钢表面激光合金化 Cr-CrB2层的腐蚀性研究
Study on corrosion property of laser surface alloyed Cr-CrB2 layers on stainless steel
摘要
Abstract
In order to improve the wear and corrosion resistance of SUS 304 stainless steel , an alloyed layer of Cr-CrB2 was fabricated on SUS 304 stainless steel using laser surface alloying .The datum about microstructure , phases and the corrosion property of the alloyed layer were obtained .Dense and homogeneous structure and fine grains were observed in the alloyed layer .A metallurgical bonding interface was formed between the alloyed layer and the substrate .The alloyed layer consists of austenite , martensite, Fe-Cr, chromium carbide and chromium boride .The alloyed layer shows higher corrosion resistance and lower corrosion rate than the substrate .The polarization curve of the alloyed layer has a long activaton-passivation segment .Intergranular corrosion and pitting in the grains and the grain boundaries are observed for substrate , and intergranular corrosion occurs mainly in the boundary .The alloyed layer shows intergranular corrosion in combination with pitting in the grains and grain boundaries .The size of the pitting in the substrate is larger than that in the alloyed layer.The results have a great help on the improvement of the wear and corrosion resistance of SUS 304 stainless steel.关键词
激光技术/腐蚀/激光表面合金化/SUS 304不锈钢/Cr-CrB2Key words
laser technique/corrosion/laser surface alloying/SUS 304 stainless steel/Cr-CrB2分类
矿业与冶金引用本文复制引用
张满奎,孙桂芳,张尉,刘卫祥,王昆..不锈钢表面激光合金化 Cr-CrB2层的腐蚀性研究[J].激光技术,2014,(2):240-245,6.基金项目
中国博士后科学基金特别资助项目（201104513）；国家教育部博士点专项基金资助项目 （）
