张帅,任毅,王爽,高红

• 1:海洋装备用金属材料及其应用国家重点实验室
• 2:鞍钢集团钢铁研究院

摘要(Abstract)：

利用工业试验研究了装炉温度对管线用高强度宽厚板的性能、微观组织、合金元素固溶和析出相的影响。结果表明:由于热装铸坯厚度截面存在较大的温度差异,720℃装炉时,铸坯内部未发生γ-α相变的比例大,使奥氏体粗大,脆性断裂倾向高;550℃装炉时,铸坯厚度中心附近γ-α相变不充分,导致钢板的晶粒细化和DWTT性能低于室温装炉。热装时铸坯中合金元素的固溶量高,促进10 nm以下的细小析出相的形成,但会导致晶粒粗化和微观组织中铁素体比例减少。因此,热装钢板的抗拉强度和DWTT剪切面积低于室温冷装钢板。

关键词(KeyWords)： 管线钢;热装;微观组织;固溶;析出

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFC0310303,2017YFB0304900)

作者(Author): 张帅,任毅,王爽,高红

DOI: 10.13289/j.issn.1009-6264.2021-0173

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