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热输入对S43932超纯铁素体不锈钢焊接接头组织性能的影响

Special Steel(2021)

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Abstract
对1.0 mm厚度的S43932不锈钢冷轧板分别进行88、101、132、188J/mm的钨极氩弧焊焊接,研究了焊接区的显微形貌和相组成.详细分析了垂直焊缝、平行焊缝和带缺口焊缝试样的拉伸性能及焊缝杯突试验结果,当热输入为101 J/mm时,焊接接头具有最佳的拉伸及成形性能匹配,之后随热输入>101 J/mm,焊接接头抗拉强度和埃里克森杯突值急剧下降.焊接接头良好的力学性能与焊接区小尺寸晶粒的形成及大量富Ti(Nb,Ti)(C,N)相的析出有关.
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