摘要
在Gleeble1500D热模拟实验机上模拟了27SiMn液压支柱管的生产工艺。通过降低加热温度及第一道次、第二道次变形温度,提高轧后冷却速度来研究组织的变化规律。结果表明:随着冷却速度的提高,相变后的组织更加细化,组成相也发生了变化,1℃.s-1时为铁素体+珠光体,5℃.s-1,10℃.s-1时均为铁素体+珠光体+贝氏体,且随冷却速度的提高,贝氏体含量增多,提高了材料的机械性能。
The production process of hydraulic pillar-used 27 SiMn steel seamless tube was simulated by using Gleeble 1500D thermal simulation testing machine. By lowering the heating temperature, the first pass deformation temperature and second pass deformation temperature and raising the cooling speed after rolling, the evolution law of mierostrueture was studied. The resuits show that with increase of cooling speed, the transformed microstructure is finer and the component phases are different. The component phases are ferrite and pearlite when cooling speed is 1℃·s^-1 ; those are ferrite, pearlite and bainite when cooling speeds are 5 ℃· s^-1 and 10℃· s^-1. The content of bainite rises and the mechanical property is better with increase of cooling speed.
出处
《包钢科技》
2006年第1期32-35,共4页
Science & Technology of Baotou Steel
