黄少文,周平,霍孝新

• 1:莱芜钢铁集团有限公司技术中心

摘要(Abstract)：

通过SEM,TEM,EBSD和示波冲击实验研究了450℃回火对X100管线钢显微组织和冲击断裂过程的影响。结果表明:X100管线钢的组织为板条贝氏体(LB)、针状铁素体(AF)和粒状贝氏体(GB)和平行排列的细小片状马氏体/奥氏体(M/A)组元,原始奥氏体晶粒被晶内和晶界处的亚结构分割细化。回火后,平行排列的M/A组元消失,LB结构弱化,大角度晶界比例下降。实验温度降低,X100管线钢的冲击功(E)、裂纹形成能(E1)和韧性扩展能(E2)变化较小;回火后,E、E1、E2、脆性断裂扩展能(E3)降低,脆性断裂趋势增大,脆性断裂止裂性能变差。

关键词(KeyWords)： X100管线钢;回火热处理;冲击断裂;裂纹扩展;微观组织

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 黄少文,周平,霍孝新

DOI: 10.13289/j.issn.1009-6264.2013.s1.025

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