45号钢二次枝晶臂间距与冷却速度的关系  

RELATIONSHIP BETWEEN COOLING RATE AND SECONDARY DENDRITE ARM SPACING FOR STEEL No. 45

作　　者：程鸣涛[1] 唐仲和 倪满森[2] 

机构地区：[1]冶金部钢铁研究总院16室,硕士研究生北京100081 [2]冶金部钢铁研究总院

出　　处：《钢铁研究学报》1993年第4期1-4,共4页Journal of Iron and Steel Research

摘　　要：本文利用可控平均冷却速度的单向凝固实验炉测定了45号钢在不同平均冷却速度下的冷却曲线,由此得到其在凝固期间的平均冷却速度R,相应地测量了不同平均冷却速度下试样的二次枝晶臂间距S_2,通过回归,得到了如下关系式:S_2=727R^(-0.4t),并将此式成功地应用于实际生产中。Some cooling curves of carbon steel (0.45 %C) with various cooling rate have been obtained by unidirectional solidification model experiment in this paper The average cooling rate during solidification is gotten from the measured cooling curves of some specimens. The influence of cooling rate on secondary dendrite arm spacing has been examined. It is fo und that secondary dendrite arm spacing S2 of ;he specimens is determined by the average cooling rate R. The relationship between S2 and R for carbon steel (0.45% C) is S2 = 727R-0.41.

关 键 词：碳素钢 冷却速度 二次枝晶 

分 类 号：TG111.4[金属学及工艺—物理冶金]