刘俊建,刘润,王万里,吴跃,王严,汤文明

• 1:大唐锅炉压力容器检测中心有限公司
• 2:大唐华东电力试验研究院
• 3:合肥工业大学材料科学与工程学院

摘要(Abstract)：

采用显微组织观察及力学性能测试研究了服役态Super304钢管外壁组织异常区结构特征及其对服役态Super304H钢管力学性能的影响,探讨了奥氏体晶粒异常长大的原因。结果表明,服役Super304H钢管外壁形成了连续的组织异常区,奥氏体晶粒度为1级。该服役钢管室温拉伸强度虽较供货态高,但外壁组织异常区的强度、塑性显著降低,拉伸断口呈现准解理断裂特征。残余变形、第二相析出长大及内外壁温度与应力分布的差异等可能是造成服役态Super304H钢管外壁区域奥氏体晶粒异常长大的原因。

关键词(KeyWords)： Super304H钢管;异常长大;组织结构;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘俊建,刘润,王万里,吴跃,王严,汤文明

DOI: 10.13289/j.issn.1009-6264.2020-0426

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