J.M.Gong
金属学报(英文版)
In this paper, the effect of carbon migration on creep properties of Cr5Mo dissimilar welded joints with Ni-based (Inconel 182) and Cr23Ni13 (A302) austenitic weld metal was investigated. Carbon migration near the weld metal/ferritic steel interface of Cr5Mo dissimilar welded joints was analyzed by aging method. Local creep deformations of the dissimilar welded joints were measured by a long-term local creep deformation measuring technique. The creep rupture testing was performed for Cr5Mo dissimilar welded joints with Inconel 182 and A302 weld metal. The research results show that the maximum creep strain rate occurs in the decarburized zone located on heat affect zone (HAZ) of Cr5Mo ferritic steel. The creep rupture life of Cr5Mo dissimilar welded joints with A302 weld metal decreases due to carbon migration and is about 50％ of that welded with Inconel 182 weld metal.
关键词:
dissimilar welded joint
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null
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赵雷
,
杨超
,
乔汉文
,
梁军
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钟群鹏
,
徐连勇
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肖德铭
材料热处理学报
采用自动氩弧焊,选用不同焊接工艺对T92和S30432异种钢进行了焊接,研究了异种钢接头中δ铁素体的分布情况以及焊接工艺变化对δ铁素体含量的影响.结果表明:T92/S30432异种钢接头熔合区存在块状的δ铁素体,其性质是合金铁素体,沿熔合区方向呈带状分布,且在焊接接头上不均匀分布,焊接接头底部和表面区域δ铁素体含量高、尺寸大,其他区域极少;ERNiCrMo-3焊丝和小坡口角度下异种钢接头中δ铁素体含量较高,其他焊接工艺参数变化(层间温度、焊接层数、热处理温度)对δ铁素体含量影响较小.
关键词:
异种钢接头
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焊接工艺
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δ铁素体
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显微组织
