大型铸锭凝固过程热模拟方法  

Thermal Simulation Method of Solidification Process in Heavy Ingot

作　　者：俞基浩 赵静[1] 张浚哲[1] 陈峥[1] 仲红刚[1] 翟启杰[1] 

机构地区：[1]上海现代冶金与材料制备重点实验室上海大学,上海200072

出　　处：《铸造》2015年第8期754-757,共4页Foundry

基　　金：国家重点基础研究发展计划(2011CB012902);上海市政府科研项目(14DZ2261200)

摘　　要：提出了一种大型铸锭凝固过程热模拟方法并开发了一套热模拟试验装置。将数值模拟得到的大型铸锭凝固过程冷却曲线作为热模拟试验单元的控制条件,实现用20 kg小铸锭再现几百吨大型铸锭凝固组织的目的。此模拟方法弥补了数值模拟和铸锭解剖法的不足,为了解大型铸锭缓慢冷却条件下凝固组织提供了研究手段。利用该装置模拟了230 t低压转子钢的凝固过程,凝固组织为粗大树枝晶,与铸锭解剖结果较一致,表明该方法可以实现缓慢冷却条件下凝固组织的模拟。This paper presents a method of thermally simulating the solidification process in heavy ingot and introduces a device which was developed for thermal simulation. The cooling curve of heavy steel ingot in the solidification process was calculated through numerical simulation sot^vare and adopted as control conditions for thermal simulation unit. The thermal simulation of a small ingot of 20 kg simulated the solidification structure of hundreds of tons ingot. This simulation method makes up the disadvantages of only using numerical simulation or ingot dissection and provides a research measure of the solidification structure of heavy ingots under slow cooling conditions. The solidification process of 230 tons low pressure rotor steel ingot was simulated by the device. The solidification structure of the ingot is coarse dendrite, which is almost consistent with the ingot dissection results. It is showed that this method can achieve the goal of simulating the solidification structure under slow cooling conditions.

关 键 词：大型铸锭 数值模拟 热模拟 凝固组织 

分 类 号：TG244.3[金属学及工艺—铸造]