高秋志,刘永长,汪应玲,叶杰

• 1:东北大学秦皇岛分校资源与材料学院
• 2:天津大学材料科学与工程学院先进连接技术天津市重点实验室

摘要(Abstract)：

研究了焊后热处理(PWHT)保温时间的变化对新型高Cr铁素体耐热钢焊接接头焊缝的组织形态,焊接接头的拉伸性能以及沉淀相的分布、颗粒尺寸等的影响。结果表明,随着保温时间的延长,马氏体板条尺寸逐渐增加,位错密度降低,组织发生了再结晶;大部分的M23C6沉淀相位于晶界/亚晶界,且颗粒尺寸比晶内的大得多,并逐渐粗化长大,几乎观察不到MX相的变化;焊接接头的拉伸性能随保温时间的延长逐渐升高,但受组织回复和再结晶的影响,增长速率逐渐降低。

关键词(KeyWords)： 高Cr铁素体耐热钢;焊接接头;拉伸性能;组织;沉淀相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 高秋志,刘永长,汪应玲,叶杰

DOI: 10.13289/j.issn.1009-6264.2014.03.017

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