| 热轧低密度钢Fe-1.80Mn-1.05Al-0.09C的高温热塑性 |
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| 引用本文： | 马英建,彭其春,袁清,梁亮,齐江华,肖爱达,薛正良.热轧低密度钢Fe-1.80Mn-1.05Al-0.09C的高温热塑性[J].金属热处理,2023,48(2):43-49. |
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| 作者姓名： | 马英建 彭其春 袁清 梁亮 齐江华 肖爱达 薛正良 |
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| 作者单位： | 1.武汉科技大学 省部共建耐火材料与冶金国家重点实验室, 湖北 武汉 430081;2.湖南华菱涟源钢铁有限公司技术中心, 湖南 娄底 417009 |
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| 基金项目： | 国家自然科学基金联合基金(U20A20270) |
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| 摘 要： | 采用Gleeble 3500热模拟试验机对一种低合金系热轧低密度钢进行了高温(760～1200℃)热塑性研究，并结合光学显微镜、体视显微镜以及扫描电镜对拉断后的断口附近组织和断口形貌进行了表征。结果表明，随着拉伸温度升高，断口面积逐渐缩小，韧窝也逐渐变大变深，断面收缩率总体表现良好，均达到80%以上，表现出了良好的高温热塑性。但是试验钢在900～1000℃进行拉伸时，出现了多处颈缩现象，900～1000℃时存在理论塑性低谷区，应避免在900～1000℃进行铸坯矫直或轧制。
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| 关 键 词： | 低密度钢 高温热塑性 断口形貌 抗拉强度 颈缩 |
| 收稿时间： | 2022-09-27 |
High temperature thermo-plasticity of hot rolled Fe-1.80Mn-1.05Al-0.09C low density steel |
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| Ma Yingjian,Peng Qichun,Yuan Qing,Liang Liang,Qi Jianghua,Xiao Aida,Xue Zhengliang.High temperature thermo-plasticity of hot rolled Fe-1.80Mn-1.05Al-0.09C low density steel[J].Heat Treatment of Metals,2023,48(2):43-49. |
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| Authors: | Ma Yingjian Peng Qichun Yuan Qing Liang Liang Qi Jianghua Xiao Aida Xue Zhengliang |
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| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;2. Technology Center of Hunan Valin Lianyuan Iron and Steel Co., Ltd., Loudi Hunan 417009, China |
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| Abstract: | High-temperature (760-1200 ℃) thermo-plasticity of a low alloy hot rolled low density steel was studied by means of Gleeble 3500 thermal simulation test machine. The fracture morphology and microstructure near fracture were characterized by optical microscope, stereomicroscope and scanning electron microscope. The results show that with the increase of tensile temperature, the fracture area gradually shrinks and dimples gradually become larger and deeper. The overall percentage reduction of area is good, which can reach more than 80%, showing good high temperature thermo-plasticity. However, when the tested steel is stretched at 900-1000 ℃, there are multiple neck shrinkage phenomena. There is a theoretical low plastic valley at 900-1000 ℃. It is necessary to avoid slab straightening or rolling at 900-1000 ℃. |
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| Keywords: | low density steel high temperature thermo-plasticity fracture morphology tensile strength neck shrinkage |
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