周磊磊,林大为,周灿栋,王成全,宋洪伟

• 1:上海大学材料科学与工程学院
• 2:上海大学材料科学与工程学院
• 3:宝山钢铁股份有限公司技术中心
• 4:宝山钢铁股份有限公司技术中心

摘要(Abstract)：

利用共聚焦激光扫描显微镜原位观察不同升温速率下双相不锈钢中奥氏体(γ)向高温铁素体(δ)转变的全过程。结果表明,γ→δ相变存在两种转变机制:即形核-长大机制和相界迁移机制。在升温速率较高的情况下相变以形核-长大为主,在升温速率较低的情况下以相界迁移为主,多数情况下两种转变机制共存。利用固态相变形核理论分析了不同相变机制产生的原因,并通过扩散控制长大理论对δ的长大速度及其影响因素做出探讨。

关键词(KeyWords)： 双相不锈钢;相变;加热速度;共聚焦激光扫描显微镜

Abstract:

Keywords:

基金项目(Foundation): 宝钢集团有限公司重点研究资助项目(BG050004)

作者(Author): 周磊磊,林大为,周灿栋,王成全,宋洪伟

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