摘要
利用实验室热模拟试验机Gleeble3500模拟Q345B钢轧制过程,并控制轧后的冷却速度,通过分析金相组织和膨胀曲线研究控轧控冷对组织的影响。结果表明,随着冷却速度增加,相变温度下降,不同冷却速度下组织差异较大;当冷却中间保温温度低于600℃,将得到了铁素体+珠光体+少量贝氏体组织,当冷却中间保温温度大于620℃,将得到细小铁素体+珠光体组织。
Simulation experiments of the rolling and cooling were carried out on Q345B steel by Gleeble-3500. Through analysis of the microstructure and expansion curves, the effects of controlled rolling and cooling on microstructure were investigated. The results show that with the increase of cooling rate, phase transformation temperature drops, and the difference of microstructure is obvious. When mid-cooling hold temperature is less than 600℃during cooling, microstructure of the samples is ferrite, pearlite and a bit of bainite, and when hold temperature higher than 620 ℃, the microstructure is fine ferrite and pearlite.
出处
《金属热处理》
CAS
CSCD
北大核心
2013年第5期26-28,共3页
Heat Treatment of Metals
关键词
微合金钢
相变
模拟
控制冷却
micro-alloyed steel
phase transformation
simulation
controlled cooling
