采用多功能退火模拟器,按照首钢1号CGL（连续镀锌生产线）配置研究了带速、加热温度及快冷终止温度对590MPa级热镀锌双相钢力学性能的影响。研究结果表明,提高带速可以提高冷却速度和减少带钢在均衡段停留时间,有利于保证双相钢的性能。要获得良好性能的双相钢,大于90m/min的带速是必要的。加热温度过低会导致双相钢强度不足,过高则会导致伸长率和硬化指数降低。800℃的加热温度可以获得较好的双相钢综合力学性能。快冷终止温度升高,双相钢的抗拉强度和加工硬化指数都显著降低。在均衡段电加热有能力保证镀锌温度的情况下,降低快冷终止温度有利于获得良好的双相钢力学性能。
Based on the configuration of CGL（Continuous Galvanizing Line） 1 in Shougang,the multi-purpose annealing simulator was used to investigate the influence of strip speed,heating temperature and rapid-cooling end temperature on the mechanical properties of hot-galvanized dual phase（DP） steel.The research results show that increasing the strip speed can increase the cooling rate and decrease the residence time of strip in equilibrium stage,therefore it is benefit for the mechanical properties of DP steel.It is necessary to ensure good mechanical properties of DP steel that the strip speed is more than 90 m/min.If the heating temperature is too low,it will lead to insufficient strength of DP steel,whereas excessively high heating temperature will result in lower elongation and hardening exponent.Heating to and soaking at 800 ℃ can get better comprehensive mechanical properties of DP steel.Increasing the rapid-cooling end temperature,the tensile strength and work hardening exponent of DP steel decrease significantly.If the electric heating in equilibrium stage can ensure the galvanizing temperature,reducing the rapid-cooling end temperature is conducive to obtain good mechanical properties of DP steel.
参考文献
| [1] | Rashid M S.Relationship Between Steel Microstructure and Formability[A].New York.TMS/AIME,1979:1. |
| [2] | 马鸣图;吴宝榕.双相钢--物理和力学冶金[M].北京:冶金工业出版社,2009 |
| [3] | 邝霜 .500MPa、600MPa级冷轧双相钢组织性能控制及强化机理研究[D].北京:北京科技大学,2010. |
| [4] | 邝霜,康永林,于浩,刘仁东,严玲.冷轧双相钢连续退火组织的转变[J].钢铁,2007(11):65-68,73. |
| [5] | KUANG S;KANG Y L;YU Y et al.Simulation of Intercrit- ical Austenization of a C-Mn Cold Rolled Dual Phase Steel[J].Material Seienee Forums,2008,575-578(04):1062. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%