| 控冷工艺对热轧双相钢组织与性能的影响 |
| |
| 引用本文： | 熊维亮,梁文,吴腾,梁亮,吴浩鸿.控冷工艺对热轧双相钢组织与性能的影响[J].金属热处理,2022,47(9):130-133. |
| |
| 作者姓名： | 熊维亮 梁文 吴腾 梁亮 吴浩鸿 |
| |
| 作者单位： | 1.涟源钢铁有限公司 技术中心, 湖南 娄底 417009;2.武汉科技大学 材料与冶金学院, 湖北 武汉 430080 |
| |
| 基金项目： | 国家自然科学基金(51771139);省部共建耐火材料与冶金国家重点实验室青年基金(2018QN07) |
| |
| 摘 要： | 基于合金减量化原则,通过热轧+超快冷技术得到了强韧性较好的600 MPa级热轧双相钢,研究了控冷工艺对其组织与性能的影响。结果表明,随着弛豫时间的减少和卷取温度的降低,钢中铁素体体积分数逐渐减少,铁素体晶粒尺寸逐渐减小,抗拉强度由602 MPa 增加至637 MPa,伸长率由31.0%减小至24.0%,屈强比为0.53~0.59,n值为0.17~0.21。综合考虑板形风险和力学性能,试验钢合适的卷取温度为150 ℃,合适的弛豫时间为7 s。
|
| 关 键 词： | 热轧双相钢 控冷工艺 显微组织 力学性能 |
| 收稿时间： | 2022-04-23 |
Effect of controlled cooling process on microstructure and mechanical properties of hot-rolled dual phase steel |
| |
| Xiong Weiliang,Liang Wen,Wu Teng,Liang Liang,Wu Haohong.Effect of controlled cooling process on microstructure and mechanical properties of hot-rolled dual phase steel[J].Heat Treatment of Metals,2022,47(9):130-133. |
| |
| Authors: | Xiong Weiliang Liang Wen Wu Teng Liang Liang Wu Haohong |
| |
| Affiliation: | 1. Technology Center, Lianyuan Iron and Steel Group, Loudi Hunan 417009, China;2. School of Materials and Metallurgy Engineering, Wuhan University of Science and Technology, Wuhan Hubei 430080, China |
| |
| Abstract: | Based on the principle of alloy reduction,a 600 MPa grade hot-rolled dual phase steel with better strength and toughness was obtained by using hot rolling and ultra fast cooling technology, and then the effect of controlled cooling process on microstructure and mechanical properties of the tested steel was studied. The results show that with the decrease of relaxation time and coiling temperature, the volume fraction and grain size of ferrite decrease gradually, the tensile strength increases from 602 MPa to 637 MPa, the elongation decreases from 31.0% to 24.0%, the yield ratio is 0.53-0.59, and the n value is 0.17-0.21. Considering the mill load and mechanical properties, the appropriate coiling temperature and relaxation time for the tested steel are 150 ℃ and 7 s, respectively. |
| |
| Keywords: | hot-rolled dual phase steel controlled cooling process microstructure mechanical properties |
|
| 点击此处可从《金属热处理》浏览原始摘要信息 |
|
点击此处可从《金属热处理》下载全文 |
|
