OALib Journal期刊
ISSN: 2333-9721
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超极钢焊接接头粗晶区的精细结构
, PP. 505-509
Keywords: 超细晶粒钢,粗晶区,精细结构
Abstract:
用电子显微镜观察了超极钢的熔化极混合气体保护脉冲焊三种焊接接头粗晶区的精细结构,并测量了显微沿焊缝的分布.结果表明三种焊接参数下的热影响区中均未出现软化现象;随着热输入线能量的升高,粗晶区中的铁素体形态和碳化物的形态、分布和取向也变得复杂多样。在线能量的接头粗晶区中,铁素体以块状为主,碳化物数量较少,呈粒状;在线能量较高的接头粗晶区中,铁素体为板条状、块状,碳化物呈粒状,棒状等平行地分布在铁素上,并与板条长轴呈不同的夹角。
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