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| 退火工艺对Cu-Ni深冲DP钢组织与性能的影响 | |
| 引用本文： | 张腾飞,潘红波,沈晓辉,刘海亮,刘伟明,闫军. 退火工艺对Cu-Ni深冲DP钢组织与性能的影响[J]. 钢铁, 2020, 55(10): 75-82. DOI: 10.13228/j.boyuan.issn0449-749x.20200045 |
| 作者姓名： | 张腾飞 潘红波 沈晓辉 刘海亮 刘伟明 闫军 |
| 作者单位： | 1.安徽工业大学冶金减排与资源综合利用教育部重点实验室, 安徽 马鞍山 243002; 2.安徽工业大学冶金工程与资源综合利用安徽省重点实验室, 安徽 马鞍山 243002; 3.安徽工业大学冶金工程学院, 安徽 马鞍山 243002; 4.西交利物浦大学化学系, 江苏 苏州 215123 |
| 基金项目： | 国家自然科学基金资助项目(51774006,U1860105); 安徽省自然科学基金资助项目(1708085ME116); 安徽省重大专项资助项目(18030901085) |
| 摘 要： | 为了探讨Cu-Ni合金化深冲双相钢组织性能演变规律,在实验室采用DIL805A/D淬火热膨胀仪与盐浴炉对其连续冷却转变行为及连续退火工艺进行了研究。结果表明,试验钢的Ac1、Ac3分别为821与969 ℃。贝氏体转变冷却速率为0.5~60 ℃/s,铁素体转变冷却速率为0.5~5 ℃/s,冷却速率为3 ℃/s时未发生珠光体转变。在820~880 ℃退火温度范围内试验钢的组织为铁素体与岛状马氏体;随着退火温度的升高,强度与伸长率先减小后增大,而r值呈现先增大后减小的趋势。在880 ℃退火时综合力学性能最佳,屈服强度达401.2 MPa、抗拉强度达451.4 MPa、伸长率为18.6%、r值为1.21。 |
| 关 键 词： | 铜合金化 深冲双相钢 连续冷却转变 连续退火 组织性能 |
| 收稿时间： | 2020-02-10 |
Effects of annealing processes on microstructure and mechanical properties of Cu-Ni deep drawing dual-phase steel |
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| ZHANG Teng-fei,PAN Hong-bo,SHEN Xiao-hui,LIU Hai-liang,LIU Wei-ming,YAN Jun. Effects of annealing processes on microstructure and mechanical properties of Cu-Ni deep drawing dual-phase steel[J]. Iron & Steel, 2020, 55(10): 75-82. DOI: 10.13228/j.boyuan.issn0449-749x.20200045 | |
| Authors: | ZHANG Teng-fei PAN Hong-bo SHEN Xiao-hui LIU Hai-liang LIU Wei-ming YAN Jun |
| Affiliation: | 1. Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education, Anhui University of Technology, Ma′anshan 243002, Anhui, China; 2. Anhui Province Key Laboratory of Metallurgical Engineering and Resources Recycling, Ma′anshan 243002, Anhui, China; 3. School of Metallurgical Engineering, Anhui University of Technology, Ma′anshan 243002, Anhui, China; 4. Department of Chemistry, Xi′an Jiaotong-Liverpool University, Suzhou 215123, Jiangsu, China |
| Abstract: | In order to investigate the evolution of microstructure and properties of Cu-Ni alloy deep drawing dual phase steel,continuous cooling transformation behavior and continuous annealing process were studied in the laboratory by using DIL805A/D quenching thermal dilatometer and salt bath furnace. The results show that the phase transformation temperature of Ac1 and Ac3 is 821 ℃ and 969 ℃ respectively. The bainite transformation is occurred at a cooling rate of 0.5-60 ℃/s,and the ferrite transformation is occurred at a cooling rate of 0.5-5 ℃/s,however,the pearlite transformation does not occur when the cooling rate is 3 ℃/s. The microstructure of the tested steel is composed of ferrite and island martensite during annealing at 820-880 ℃. With the increase of annealing temperature,the strength and elongation decrease firstly and then increase,while the r value shows the opposite trend. The tested steel annealed at 880 ℃ obtains the optimum comprehensive mechanical properties with yield strength of 401.2 MPa,tensile strength of 451.4 MPa,elongation of 18.6%,and r value of 1.21. |
| Keywords: | Cu alloying deep-drawing dual-phase steel continuous cooling transformation continuous annealing microstructure and mechanical property |
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