| 引用本文: | 操龙飞,徐光,邓鹏,吴隽,吴润.低合金钢热膨胀系数测定和分析[J].材料科学与工艺,2013,21(3):105-109.DOI:10.11951/j.issn.1005-0299.20130316. |
| CAO Long-fei,XU Guang,DENG Peng,WU Jun,WU Run.Measurement and analysis of thermal expansion coefficients of low alloy steel[J].Materials Science and Technology,2013,21(3):105-109.DOI:10.11951/j.issn.1005-0299.20130316. |
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| 低合金钢热膨胀系数测定和分析 |
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操龙飞1,2,徐光1,2,邓鹏1,2,吴隽1,2,吴润1,2
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（1.武汉科技大学 材料与冶金学院,武汉 430081;
2.武汉科技大学 钢铁冶金及资源利用省部共建教育部重点实验室,武汉 430081）
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| 摘要: |
| 按照国标对某热连轧生产线上的两种典型钢种的热膨胀系数进行实验测量,得出其线性热膨胀率、平均线膨胀系数和瞬时线膨胀系数随温度的变化曲线,对比分析了钢种的化学成分对总膨胀量的影响实质以及取样方向对膨胀系数的影响.结果表明：金属材料的化学成分主要通过影响相变点温度而影响膨胀量；取样方向不影响金属材料的膨胀系数,即膨胀系数是各向同性的.实验得到两个钢种在不同温度段的热膨胀系数值,为实际的宽度在线控制提供了依据. |
| 关键词: 低合金钢 热膨胀系数 瞬时线膨胀系数 相变点 取样方向 |
| DOI：10.11951/j.issn.1005-0299.20130316 |
| 分类号: |
| 基金项目:湖北省教育厅重点项目（D20121101）. |
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| Measurement and analysis of thermal expansion coefficients of low alloy steel |
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CAO Long-fei1,2,XU Guang1,2,DENG Peng1,2,WU Jun1,2,WU Run1,2
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（1.Faculty of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology, Wuhan 430081, China)
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| Abstract: |
| The thermal expansion coefficients of two typical steel grades on hot continuous rolling product line were measured by standard experiments, and the curves of linear, average and instant expansion coefficients versus the temperature were given. The effect of chemical composition on total thermal expansion and the influence of sampling direction on expansion coefficients were investigated. The results show that the effect of chemical composition on coefficient of thermal expansion is caused by the change of phase transformation points. The coefficient of thermal expansion (CTE) is not affected by sampling direction, which means that the CTE is isotropic. The CTEs in different temperature periods provide the basic foundation for the on-line control of width of these steels. |
| Key words: low alloy steel coefficient of thermal expansion instant linear expansion coefficient phase transformation points sampling direction |
