连铸轴承钢坯的轧后控冷工艺  

Controlled cooling process on rolled CC bearing steel billet

作　　者：牟风[1] 李胜利[1] 

机构地区：[1]辽宁科技大学材料科学与工程学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2009年第2期131-133,共3页Journal of University of Science and Technology Liaoning

摘　　要：国内某特钢厂在连铸连轧生产线上,用250 mm×280 mm连铸GCr15轴承钢方坯直接轧制直径22-100 mm圆钢。为了控制轴承钢轧后的网状碳化物,以现场取样的方坯为研究对象,利用MMS-200热模拟实验机进行模拟实验,分析了1 000℃终轧后的显微组织,得出以大于5℃/s的冷速控冷可以抑制粗大网状组织的产出。借助ANSYS有限元分析软件,讨论了在现有生产线上实现抑制网状碳化物析出的可行性。On a casting and rolling production line in an internal special steel factory, the Φ 22 - 100 mm round steel is roiled by using the 250 mm × 280 mm of continuous casting GCr15 bearing square billet. In order to control the mesh carbide after bearing steel rolled, simulation experiment of billet from factory was simulated by MMS-200 thermal simulation machine, the microstructure of finishing temperature of 1 000 ℃ was analyzed. The result show that the coarse mesh micro,structure can be inhibited when the cooling rate of the controlled cooling is more than 5 ℃ /s. The feasibility of inhibiting precipitation of the mesh carbide on the existing production line is discussed by using ANSYS finite element analysis software.

关 键 词：连铸坯 网状碳化物 控轧控冷 轴承钢 

分 类 号：TG335.62[金属学及工艺—金属压力加工]