陈雷,张英杰,李飞,裴建明,毛天桥,孙登月

• 1:燕山大学国家冷轧板带装备及工艺工程技术研究中心

摘要(Abstract)：

采用热压缩试验研究了22Cr铸态双相不锈钢在变形温度为1000~1200℃,应变速率为1~50 s-1条件下的热变形行为。为了准确的表征双相不锈钢热变形过程中的力学行为,修正了热压缩过程中摩擦和变形热效应引起的流变应力误差。在此基础上建立了双相不锈钢的流变应力预测模型。该模型通过考虑应变对材料常数(α、n、Q和ln A)的影响,进一步获得了双相不锈钢热变形过程中流变应力与变形温度、应变速率和应变的关系。结果表明:所建立的模型能较好的预测双相不锈钢的热变形行为,预测值与实验值的相关系数为0.995,平均相对误差为4.48%。

关键词(KeyWords)： 铸态双相不锈钢;高应变速率;修正;热变形;流变应力模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101136);; 河北省高等学校科学技术研究青年基金(QN2014107);; 国家冷轧板带装备及工艺工程技术研究中心开放课题(NECSR-201501);; 河北省高等学校创新团队领军人才培养计划(LJRC012);河北省高等学校创新团队领军人才培养计划(LJRC012);; 河北省自然科学基金—钢铁联合基金(E2016203284)

作者(Author): 陈雷,张英杰,李飞,裴建明,毛天桥,孙登月

DOI: 10.13289/j.issn.1009-6264.2016.06.038

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