退火工艺对1180MPa级双相钢显微组织和力学性能的影响

甄维静; 陈俊东; 李永亮; 王福明

doi:10.7513/j.issn.1004-7638.2020.04.026

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退火工艺对1180MPa级双相钢显微组织和力学性能的影响

doi: 10.7513/j.issn.1004-7638.2020.04.026

1. 唐山科技职业技术学院, 河北唐山 063001;
2. 河钢集团唐钢公司技术中心, 河北唐山 063016;
3. 北京科技大学冶金学院, 北京 100083

基金项目:

国家自然科学基金(51571019)资助项目

详细信息

作者简介:
甄维静(1982-),女,河北唐山人,本科,讲师,主要从事钢的强化机理研究,E-mail:672535311@qq.com

中图分类号: TF76,TG156.2
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- 文章访问数: 22
- HTML全文浏览量: 6
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2019-11-29

Effect of Annealing Process on Microstructure and Mechanical Properties of 1 180 MPa Dual Phase Steel

1. Tangshan Vocational College of Science and Technology, Tangshan 063001, Hebei, China;
2. Technology Center of HBIS Group Tang Steel Company, Tangshan 063016, Hebei, China;
3. School of Metallurgical Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 利用Gleeble 3500热模拟试验机、场发射扫描电镜和透射电镜等设备研究了两相区退火工艺对超高强双相钢DP1180显微组织和力学性能的影响。结果表明:760℃以下退火时,冷轧钢板主要发生退火软化现象,屈服强度显著降低,但此时马氏体含量增加并不明显;当退火温度提高至800℃以上时,由于过度奥氏体化,过冷奥氏体中C含量降低,导致过冷奥氏体的稳定性变差,生成大量贝氏体,钢的强度随着温度的提高而降低;为确保试验钢的综合力学性能,退火区间选在760~800℃最佳,可以获得细小而均匀的显微组织。
- 双相钢 /
- 连续退火 /
- 显微组织 /
- 力学性能
Abstract: The influence of annealing process on microstructure and mechanical properties of super high strength steel DP1180 was studied by means of thermo-simulator system Gleeble-3500,field emission scanning electron microscopy and transmission electron microscope.The results show that the yield strength declines quickly when the annealing temperature is below 760 ℃ due to the annealing soften effect,but the martensite fraction shows no visible increasing.When the temperature is above 800 ℃, the strength decreases gradually because of the excessive austenitization and banitic transformation which could be attributed to the decreasing carbon concentration in austenite.A perfect match of strength and plastic could obtained when steel is annealed at between 760～800 ℃,at the same time,a refined and homogeneous microstructure could be obtained.
- dual phase steel /
- continuous annealing /
- microstructure /
- mechanical properties