高强低合金钢电子束焊接接头的组织与性能研究

Development and Application of Materials(2016)

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Abstract
采用电子束焊接了厚度为9 mm的15 CrNi3 MoV高强低合金钢试板,焊接接头成形良好,无内部缺陷,经热处理后焊接系数达到0.98以上.通过研究焊接接头组织和力学性能,发现热处理后,接头组织以贝氏体组织为主,在焊缝和热影响区粗晶区中出现索氏体组织,热影响区的细晶区存在粒状贝氏体组织,焊接接头的冲击韧性与母材相比得到提升;散焦修饰使原始焊缝的柱状晶碎化,能够改善焊缝处的显微硬度.
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