Thermo-mechanical properties of ultra high strength steel 22SiMn2TiB at elevated temperature

Zengmin Shi; Kai Liu; Maoqiu Wang; Jie Shi; Han Dong; Jian Pu; Bo Chi; Yisheng Zhang; Jian Li

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Thermo-mechanical properties of ultra high strength steel 22SiMn2TiB at elevated temperature

机译：超高强度钢22SiMn2TiB在高温下的热机械性能

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摘要

The flow behavior and the thermo-mechanical properties of 22SiMn2TiB at elevated temperature were investigated isothermally by the uniaxial tensile test. The steel exhibited a high hot ductility with the value of the percentage reduction of area higher than 80% at the selected temperatures. The hot ductility showed significant dependency on the deformation temperature and appreciable dependency on the austenitization temperature. The stress level decreased with the increasing deformation temperature and the decreasing strain rate. It was found that the ausformed martensite was strengthened by the deformation of austenite at the temperature above 850 ℃, while the diffusion transformation was promoted at the temperature below 800 ℃ The flow stress could be satisfactorily illustrated by the Zener-Hollomon parameter in an exponent-type equation. Based on the Z-parameter, the Hollomon equation was revised to describe the stress-strain correlation. The predicted results were well consistent with the experimental results.

机译：通过单轴拉伸试验等温地研究了22SiMn2TiB在高温下的流动行为和热机械性能。该钢表现出高的热延展性，在选定的温度下，面积减少百分比的值高于80％。热延展性对变形温度具有显着的依赖性，对奥氏体化温度具有显着的依赖性。应力水平随着变形温度的升高和应变率的降低而降低。结果表明，奥氏体在850℃以上的温度下变形会强化奥氏体马氏体，而在800℃以下的温度下会促进扩散相变。Zener-Hollomon参数可以令人满意地说明流动应力。类型方程式。基于Z参数，修改了Hollomon方程以描述应力-应变相关性。预测结果与实验结果吻合良好。

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来源
《Materials Science and Engineering》 |2011年第11期|p.3681-3688|共8页
作者
Zengmin Shi; Kai Liu; Maoqiu Wang; Jie Shi; Han Dong; Jian Pu; Bo Chi; Yisheng Zhang; Jian Li;
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作者单位

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

National Engineering Research Center for Advanced Steel Technology, Central Iron and Steel Research Institute, Beijing 100081, PR China;

National Engineering Research Center for Advanced Steel Technology, Central Iron and Steel Research Institute, Beijing 100081, PR China;

National Engineering Research Center for Advanced Steel Technology, Central Iron and Steel Research Institute, Beijing 100081, PR China;

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR China;

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正文语种 eng
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关键词
thermo-mechanical property; ultra high strength steel; hot ductility; constitutive model;

机译：热机械性能超高强度钢;热延展性本构模型;

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机译：超高强度和常规高强度紧固件钢之间的比较：高温下的机械性能和微结构机理
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机译：超高强度和常规高强度紧固件钢之间的比较：高温下的机械性能和微结构机理
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Thermo-mechanical properties of ultra high strength steel 22SiMn2TiB at elevated temperature

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