形变温度对GCr15SiMn钢网状碳化物演化行为的影响  

Effects of deformation temperature on the evolution behaviour of carbide network in GCr15SiMn bearing steel

作　　者：周旺松 华建社[1] 俞峰[2] 曹文全[2] 孙维[3] 汪开忠[3] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]钢铁研究总院特殊钢研究所,北京100081 [3]马鞍山钢铁股份有限公司特钢公司,安徽马鞍山243000

出　　处：《钢铁》2015年第6期87-93,共7页Iron and Steel

基　　金：北京市教委共建资助项目(教13T60890)

摘　　要：在Gleeble-1500D热模拟试验机上进行单轴热压缩试验,研究了形变温度对GCr15SiMn钢的组织尤其是网状碳化物的影响。利用连续度系数来定量表征网状碳化物的连续程度。综合分析了形变温度对晶粒尺寸以及网状碳化物的连续度系数的影响。结果表明：随形变温度的升高,网状碳化物的连续性与晶粒尺寸的变化规律保持较好的一致性。网状碳化物的破碎程度随形变温度的降低而增大。综合考虑网状碳化物连续程度、晶粒尺寸以及变形抗力等因素,在轧后不控冷的条件下,GCr15SiMn的终轧温度宜定在800~850℃,其中以850℃为最佳。The effects of deformation temperature on the microstructure evolution of GCr15SiMn bearing steel were investigated by uniaxial hot compression simulation experiment. Continuity coefficient was used for the quantitative characterization of the continuity degree of carbide network. A comprehensive analysis of the deformation temperature on the grain size and the continuity of carbide network were implemented. The results indicated that the variation of the continuity of carbide network with different deformation temperatures maintains good consistency with that of the grain size. The fragmentation of carbide network increases with the decreasing of deformation temperatures. Considering the continuity of carbide network,grain size and deformation resistance and other factors,the finishing temperature of GCr15SiMn should be set at 800-850 ℃ and 850 ℃ is preferable when controlled cooling is unavailable.

关 键 词：GCr15SiMn钢 形变温度 网状碳化物 

分 类 号：TG142.15[一般工业技术—材料科学与工程]