Study of application of rare earth elements in advanced low alloy steels
Study of application of rare earth elements in advanced low alloy steels
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DOI：
10.1016/j.jallcom.2007.04.234
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发表时间：
2008-02-28
影响因子：
6.2
通讯作者：
Wang, Fu-Ming
中科院分区：
文献类型：
--
作者：
Wang, Long-Mei;Lin, Qin;Wang, Fu-Ming
用金相显微镜、X射线衍射仪、扫描电子显微镜、能谱分析和IMMA等手段研究了稀土元素对低合金钢夹杂物变质、深度净化、细化晶粒度和微合金化作用的影响。溶解的稀土元素更多地出现在晶界而不是进入晶界，微量的溶解稀土对晶界起到了清洁作用。析出相-Nb(C，N)、(Nb，Ti)(C，N)被溶解的稀土迅速弥散。最终提高了先进低合金钢的强度和韧性。耐候钢内锈层的研究结果表明，稀土元素在锈层与钢材的界面上富集物，导致Si4+、P5+、Cu+向内锈层迁移。结果表明，稀土元素能形成致密的含Si4+、P5+、Cu3+和Re3+的复合锈层，提高耐候钢的耐蚀性能。(C)2007年，爱思唯尔出版。
Effect of rare earth elements on modification of inclusions, deep purifying, refinement of grain size and micro-alloy function in advanced low-alloy steels have been investigated with metalloscopy, XRD, SEM, EDS and IMMA. The dissolved rare earths were appeared in the grain boundary better than into the grain, and the grain boundary was cleaned by a trace of the dissolved RE. Precipitation phases-Nb(C, N), (Nb, Ti) (C, N) are fine dispersed promptly by the dissolved rare earths. The strength and toughness of the advanced low-alloying steels are improved finally. The results of the inner rust layer in the weather resisting steels show that rare earth elements is enriched in the interface between the rust layer and the steel substance, which result in that Si4+, P5+ and Cu+ are moved into the inner rust layer. As a result, a dense composite rust layer containing Si4+, P5+, Cu+ and RE3+ is formed, and the property of the corrosion resisting of weather resisting steels is improved by rare earth elements. (c) 2007 Published by Elsevier B.V.