彭明天,霍向东,陈松军,李烈军,陆超,方梦龙

• 1:江苏大学材料科学与工程学院
• 2:华南理工大学机械与汽车工程学院

摘要(Abstract)：

为了研究钛微合金化高强钢在连续冷却条件下的相变规律，通过热膨胀法及金相分析研究了低碳钢(C-Mn钢)和钛微合金钢(Ti钢)在连续冷却过程中的组织变化及过冷奥氏体的相变规律，分析了钛元素和变形对试验钢相变规律的影响，并讨论了连续冷却转变(CCT)与等温转变(TTT)曲线的关系。结果表明：随着冷速的增加，试验钢的主要相变组织由铁素体向贝氏体转变。在C-Mn钢中加入钛元素提高了过冷奥氏体的稳定性，抑制了铁素体和珠光体转变，促进了贝氏体转变；在奥氏体未再结晶区进行变形使试验钢的CCT曲线整体向左上方移动，提高了相变开始温度；变形提高了铁素体的形核率，促进了铁素体相变，铁素体组织得到细化；变形促进了贝氏体相变，使板条贝氏体变短，细化贝氏体组织。

关键词(KeyWords)： 钛微合金钢;连续冷却;相变;组织演变;低碳钢

Abstract:

Keywords:

基金项目(Foundation): 广州市科技计划项目(202007020007)

作者(Author): 彭明天,霍向东,陈松军,李烈军,陆超,方梦龙

DOI: 10.13289/j.issn.1009-6264.2023-0371

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