张家豪,张珺,张新昊,任浩,张晓新,燕青芝

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

铁素体/马氏体(Ferritic/Martensitic, F/M)钢因具有优异的抗辐照性能和高温力学性能而成为先进核反应堆的候选结构材料。提高Si含量能够改善F/M钢的耐蚀性，但高硅的引入会恶化其热加工性能，因此研究高Si F/M钢的高温变形行为非常重要。在变形温度为950～1200℃和变形速率为0.01～10 s~(-1)的条件下，采用Gleeble1500型热模拟试验机对硅含量1%的10Cr1Si F/M钢进行热压缩模拟试验，研究其高温变形行为。结果表明：在0.01～0.1 s~(-1)的低变形速率下，10Cr1Si钢均发生动态再结晶；而在1～10 s~(-1)的高变形速率下发生动态回复，在本试验设计参数范围内仅在10 s~(-1)/950℃变形条件下出现了反常的动态再结晶现象。微观组织分析表明当变形温度较低而变形速率较快时，快速增殖的位错促使奥氏体动态再结晶。计算得到了10Cr1Si钢的Arrhenius本构方程和应变补偿本构模型，试验钢的真应力计算值与试验值吻合良好，可为10Cr1Si钢的热加工提供指导。

关键词(KeyWords)： 高Si铁素体马氏体钢;热压缩模拟试验;高温变形行为;本构方程

Abstract:

Keywords:

基金项目(Foundation): 核能开发科研项目(20201192)

作者(Author): 张家豪,张珺,张新昊,任浩,张晓新,燕青芝

DOI: 10.13289/j.issn.1009-6264.2023-0593

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