摘要
采用有限元模拟软件Ansys,模拟了 3mmHP2 95气瓶钢热轧卷温度场的变化 ,作出不同节点的温降曲线 ,并与该钢连续冷却转变 (CCT)曲线结合 ,分析了HP2 95钢卷材不同部分冷却过程的组织转变。模拟结果表明 ,卷取温度为 6 6 0～ 6 80℃时卷材心部平均冷却速度仅为 0 0 4℃ /s ,远远低于出现碳化物离异共析的临界冷却速度 0 1℃ /s,使卷材深冲性能急剧降低。避免碳化物离异共析 渗碳体沿铁素体晶界分布的有效措施是将卷取温度降至 6 0 0～ 6 2 0℃。
The curves of temperature drop at different node have been obtained by using finite elements simulation software Ansys to simulate the change of temperature field of 3 mm HP295 gas bottle steel hot rolled coils, and combined with continuous cooling transformation (CCT) curves of the steel to analyze the structure transformation in different parts of HP295 steel coils. The simulation results show that while coiling temperature being 660～680 ℃, the average cooling speed at centre of coil is only 0.04 ℃/s, very far lower than critical cooling speed 0.1 ℃/s to occur carbides isolation eutectoid, so the deep-drawing properties of coil sharply decrease. The coil temperature decreasing to 600～620 ℃ is an available measure to avoid carbides isolation eutectoid - cementite distributing along ferrite grain boundary.
出处
《特殊钢》
北大核心
2004年第6期39-41,共3页
Special Steel
