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首页> 外文期刊>Materials Science and Technology: MST: A publication of the Institute of Metals >Microstructural study of super NI laminated composite/1Cr18Ni9TI steel dissimilar welded joint
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Microstructural study of super NI laminated composite/1Cr18Ni9TI steel dissimilar welded joint

机译：超级NI叠层复合材料/ 1Cr18Ni9TI钢异种焊接接头的显微组织研究

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摘要

Super Ni laminated composite and 1Cr18Ni9Ti stainless steel were welded by the tungsten inert gas process with the Cr25-Ni13 filler alloy. The microstructure, element distribution and phase formation near the fusion zone were evaluated by standard technique. Results indicated the formation of four main regions: the fusion transition region on the 1Cr18Ni9Ti steel side, the fusion transition region on the super Ni laminated composite side, a columnar crystal weld region and the weld centre region. The microstructure on either side of the weld was characterized by strong directionality and changed from columnar austenite to equiaxed austenite in the weld centre. A Ni, Fe and Cr element transition region, about 30 μm wide, was formed at the fusion zone on the super Ni side. The phase formed into welded zone was composed mainly of austenite, δ-Fe, γ-Ni(Cr,Fe) and FeNi intermetallic compounds.
机译：通过钨极惰性气体处理工艺将超级镍层合复合材料和1Cr18Ni9Ti不锈钢与Cr25-Ni13填充合金焊接在一起。通过标准技术评估了熔合区附近的显微组织，元素分布和相形成。结果表明形成了四个主要区域：1Cr18Ni9Ti钢侧的熔合过渡区，超级镍叠层复合材料侧的熔合过渡区，柱状晶体焊接区和焊接中心区。焊缝两侧的显微组织具有强烈的方向性，并且在焊缝中心从柱状奥氏体变为等轴奥氏体。在超Ni侧的熔合区形成约30μm宽的Ni，Fe和Cr元素过渡区。形成焊接区的相主要由奥氏体，δ-Fe，γ-Ni（Cr，Fe）和FeNi金属间化合物组成。

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