高碳钢奥氏体动态再结晶动力学分析

Analysis of Dynamics of Dynamic Recrystallization of Austenite in High Carbon Steel

为了寻求高碳钢耐磨钢球的最佳生产工艺参数,优化耐磨钢球的生产工艺,设计了高碳钢在不同条件下的热处理工艺,并应用Gleeble-1500D热模拟机模拟高碳钢在不同条件下的高温形变热处理过程。测定各种工艺下的真应力-应变曲线,观察了奥氏体的动态再结晶情况,研究了变形温度与变形速率对奥氏体动态再结晶过程的影响,并结合再结晶动力学理论进行分析,发现高碳钢在1050℃下高变形速率锻造时,所得到的钢球产品具有良好的耐磨性能和抗冲击韧性,从而制定出合理的高碳钢耐磨钢球生产工艺。

In order to obtain the best parameters of production process of high carbon steel wearable steel-ball (HCSWSB) and further to optimize the production process, the heat treatment techniques under different conditions are designed. High-temperature thermomechanical treatment process of high carbon steel under different condition is carried out on Gleeble-1500D. The true strain-stress curve is obtained. The dynamic recryatallization process of Austenite and how temperature and deformation rate affect that process are both studied. With the analysis, an conclusion is made: when high carbon steel forged at 1 050 ℃ at high deformation rate, better mechanism of the HCSWSB, especially anti-abrasion property and anti-impact property is obtained. Finally optimized production techniques of HCSWSB is carried out. 