T10A高碳钢连铸坯凝固组织热模拟研究  

THERMAL SIMULATION OF THE SOLIDIFICATION STRUCTURE OF T10A HIGH CARBON STEEL BILLET

作　　者：仲红刚[1] 程杰[1] 徐智帅 翟启杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2016年第2期51-54,共4页Shanghai Metals

基　　金：国家重点基础研究发展计划(No.2011CB012902);国家重大科研仪器设备研制专项(No.51227803)

摘　　要：利用连铸坯凝固过程热模拟装置研究了过热度、冷却强度和强制对流对200 mm厚高碳T10A钢连铸坯凝固组织的影响。正交试验显示高碳T10A钢的凝固组织对工艺参数非常敏感,等轴晶率在0~65%之间剧烈变化。其中,强烈冷却和低过热度会导致穿晶组织,高过热度配合弱冷可获得较高等轴晶率,但需要降低拉坯速率。过热度为20~40℃配合适当的冷却条件能够获得约50%的等轴晶率,可兼顾铸坯质量和生产效率。The effect of superheat,cooling intensity and forced convection on the solidification structure of a 200 mm high carbon T10 A steel billet were observed by a thermal simulating setup,which was developed to investigate the solidification process of continuous casting billet / slab. The orthogonal experiments indicated that T10 A high carbon steel,which equiaxed grain rates changed in a range of0 ~ 65%,was very sensitive to the processing parameters of continuous casting. Entire columnar structure was observed in a sample solidified with low superheat plus strong cooling. On the contrary,high superheat and weak cooling could lead to a high equiaxed grain ratio. Inevitably,this process must result in a low pulling rate. Fifty percent of equiaxed grains could be achieved when superheat was20 ~ 40 ℃ with an appropriate cooling intensity,and these parameters were expected to be the crafting window which could balance the quality of billet and production efficiency.

关 键 词：热模拟 T10A高碳钢 连铸参数 凝固组织 

分 类 号：TG162.4[金属学及工艺—热处理]