综述了低碳及超低碳微合金钢显微组织研究的现状,介绍了奥氏体连续冷却转变时形成的各种铁素体的术语,讨论了多边及准多边铁素体、针状铁素体及晶内成核针状铁素体、粒状贝氏体铁素体等的形成机理和组织形貌.另外,还指出了文献中使用"针状铁素体"术语的一些混淆及不同理解,提出了在工程上分析复杂管线钢组织时,可将多种形态铁素体简化为铁素体及贝氏体两类.对当前西气东输管线工程中材料显微组织的判断可提供参考.
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