汪英杰,王忠军,林茹,谢康杰,吴伟平,胡奉雅,李维娟

• 1:辽宁科技大学材料与冶金学院
• 2:鞍山钢铁集团公司海洋装备用金属材料及其应用国家重点实验室

摘要(Abstract)：

在变形温度为925～1150℃和应变速率为0.01～10 s~(-1)的条件下，采用THERMECMASTOR 100 kN热模拟试验机研究了Fe-15Mn-15Al-5Ni-1C低密度钢铸锭的热变形行为，分析了其动态再结晶(DRX)特征，并绘制了其在不同应变量下的热加工图。结果表明：该铸锭变形后的组织主要由高温铁素体(δ-F)、奥氏体(A)、α-铁素体(α-F)和κ-碳化物组成。δ-F和κ-碳化物的存在使得铸锭的热加工性能变差，只有在变形温度升高到1125℃或者应变速率下降到0.02 s~(-1)时，铸锭才能获得再结晶组织，实现软化。Fe-15Mn-15Al-5Ni-1C低密度钢存在两个适宜的热加工区域，区域1:变形温度为1125～1150℃,应变速率为0.01～0.5 s~(-1);区域2:变形温度为925～1080℃,应变速率为0.01～0.02 s~(-1)。

关键词(KeyWords)： Fe-Mn-Al-Ni-C低密度钢;κ-碳化物;动态再结晶;热加工图

Abstract:

Keywords:

基金项目(Foundation): 鞍钢海洋装备用金属材料及其应用国家重点实验室-辽宁科技大学联合基金资助项目(HGSKL-USTLN(2020)05)

作者(Author): 汪英杰,王忠军,林茹,谢康杰,吴伟平,胡奉雅,李维娟

DOI: 10.13289/j.issn.1009-6264.2022-0597

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