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一、前言激光表面重熔是近年发展起来的一种改善材料耐蚀性的表面改性技术。McCafferty等和Lumsden等的研究表明,经激光重熔处理后304不锈钢的耐蚀性能,在含c1~-介质中超过316不锈钢。王茂才等对M38镍基超合金的研究工作表明,激光重熔处理由于改变了第二相分布,使耐蚀性成倍提高。 2Cr13马氏体不锈钢具有较高的强度和较好的机械性能,但其耐蚀性能远不及0Cr18Ni9等奥氏体不锈钢。本工作通过激光重熔处理对2Cr13进行表面改性,试图改善2Cr13的钝化特性和钝化膜的稳定性。
I. Introduction Laser surface remelting is a surface modification technology developed in recent years to improve the corrosion resistance of materials. Research by McCafferty et al. And Lumsden et al. Shows that the corrosion resistance of 304 stainless steel after laser remelting exceeds 316 stainless steel in c1 ~ - medium. Wang Maucai and other M38 nickel-based superalloys research work shows that laser remelting due to changes in the distribution of the second phase, so that corrosion resistance doubled. 2Cr13 martensitic stainless steel with high strength and good mechanical properties, but its corrosion resistance is far less than 0Cr18Ni9 and other austenitic stainless steel. In this work, the surface modification of 2Cr13 was carried out by laser remelting, attempting to improve the passivation characteristics of 2Cr13 and the stability of passive film.