在CP800钢的同热双压缩中进行元动态再结晶
Xiaoyu Yang1,2, Zhenli Mi1, Wangzhong Mu2
1Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|April 24, 2025
概括
通过紧钢生产 (CSP) 在CP800钢中进行元动态再结晶对于汽车钢生产至关重要. 谷物精炼是独立于最初的谷物大小,但最终的谷物大小取决于它,指导过程优化.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
- 工艺工程是过程工程.
背景情况:
- 全球对脱碳的推动推动了对汽车钢板的紧钢生产 (CSP) 的兴趣.
- 了解热变形和元动态软化是CP800钢的CSP可行性的关键.
研究的目的:
- 研究CP800钢的超动态软化行为,用于CSP应用.
- 分析变形条件和初始奥氏体颗粒大小对元动态再结晶 (MDRX) 的影响.
- 开发和验证CP800钢中MDRX的动力方程.
主要方法:
- 在1173,1273,1373 K的同热双压缩试验中,应变速率为0.1,1,5.0s-1和交叉时间为1,10,20s.
- 对流量应力-应变曲线的分析,以评估软化行为.
- 评估初始奥氏体颗粒大小 (42微米和92微米) 对MDRX的影响.
主要成果:
- 最终的滚动通道温度应超过1173K,以避免混合的粒度结构.
- 在CP800钢中,通过MDRX精炼颗粒是独立于初始颗粒大小的.
- 最终的颗粒大小对初始的颗粒尺寸敏感;较低的储存温度和较短的持续时间是节能CSP的理想选择.
结论:
- 超动态再结晶在CP800钢的CSP热变形行为中起着至关重要的作用.
- 工艺参数和初始颗粒大小显著影响MDRX和最终的微观结构.
- 优化养条件可以提高CP800钢的CSP生产的能源效率.
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