刘国亮,杨善武,周鲁军,胡强,万发荣

• 1:北京科技大学钢铁共性协同创新中心
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用自熔电子束焊与添加Ni金属箔电子束焊两种工艺以相同的焊接参数对430铁素体不锈钢与316L奥氏体不锈钢进行焊接,研究其焊接接头的组织与性能。结果表明:自熔焊缝金属的组织主要为δ-ferrite,晶界无定型马氏体与魏氏形态马氏体分别分布在δ-ferrite的晶界与晶内,残留奥氏体分布在这些马氏体内。添加Ni金属箔的焊缝金属的组织由粗大的奥氏体柱状晶构成。自熔焊缝金属的硬度显著高于添加Ni金属箔的焊缝金属,同时自熔焊缝金属的室温冲击韧性也高于添加Ni金属箔的焊缝金属。热力学分析表明,添加Ni金属箔的焊缝金属为完全的奥氏体凝固模式,形成的粗大奥氏体柱状晶稳定性高,在室温不发生TRIP效应,导致了以上反常现象。

关键词(KeyWords)： 电子束焊接;异种不锈钢焊接;微观组织;凝固模式;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51571026)

作者(Author): 刘国亮,杨善武,周鲁军,胡强,万发荣

DOI: 10.13289/j.issn.1009-6264.2020-0108

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