摘要
本文利用热加工模拟试验机研究了带钢热连轧生产工艺对含Cr、Mo双相钢轧后奥氏体相变行为的影响。指出终轧温度为850℃左右时存在着明显的形变诱导相变现象,使动态CCT曲线的贝氏体相变终了线大幅度左移,造成了二相分离型相变,为热轧生产双相钢提供了基本条件。同时根据带钢在输出辊道上的三种不同冷却工艺方案进行模拟试验,确定轧后先急冷到720℃后再空冷到680℃,第二次急冷到600℃卷取的二段喷水冷却工艺获得的多边形铁素体百分数最高,显微组织中没有贝氏体,铁素体晶粒及马氏体第二相均匀、细小。
The effects of hot rolling on the transformation behavior of Cr-Mo dual phase steel wereinvestigated on the Formastor-press Simul ? t r machine. It shows that at finishing temperatureabout 850℃ deformation induces transformation markedly, which causes bainite phase finishingtransformation line of dynamic CCT curve move to left considerably, and results in two phaseseperted type transformation. This fact provides a basic condition for production of hot-rolleddual phase steel. In addition, a simulating test was carried out for three different cooling mod-es of strip on the runput table. As a result, rapid cooling to 720℃ then air cooling to 680℃.after rolling followed by second rapid cooling to 600℃ as coiling temperature is the best one.The products obtained have highest fraction of polygonal ferrite, fine, homogeneous ferrite andmartensite in microstructure without any bainite.
出处
《钢铁》
CAS
CSCD
北大核心
1989年第1期26-30,共5页
Iron and Steel
