加工图法在热轧大圆钢表面质量控制中的应用  

Application of Processing Map Method in Surface Quality Controlling for Hot Bar Rolling

作　　者：严文超[1] 杨森[1] 章静[1] 阎军[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2011年第3期223-227,共5页Journal of Anhui University of Technology（Natural Science）

摘　　要：采用Murthy流变失稳准则的加工图方法来判断塑性变形中产生的流动失稳。通过GCr15轴承钢的热模拟压缩实验,研究变形工艺参数对GCr15高温变形时流动应力的影响规律,建立GCr15高温变形时的加工图;通过对实际孔型中轧制情况的分析,得出轧件可能产生缺陷的位置。研究结果表明:非稳定区域在950～1050℃之间,应变速率在2.0s-1以上。The flow instability during hot bar rolling is judged by the processing map method combined with the rule of Murthy flow instability criteria.The effect of the parameters on the flow stress in hot forming is studied by the hot compressing test of GCr15 steel.The processing map was established during the GCr15 steel hot rolling.The position where the defects mostly appear is explored,according to the analysis of practical rolling process.It is showed that the unsteady region is when the temperature is in the range of 950～1 050 ℃ and the strain velocity is above 2.0 s^-1.

关 键 词：加工图法 大圆钢 表面质量 动态材料模型 

分 类 号：TG335.1[金属学及工艺—金属压力加工]