Gleeble压缩试验摩擦修正研究  

Study on Friction Correction of Compression Test by Using Gleeble

作　　者：张永刚[1] 党进华 李红斌[2,3] 

机构地区：[1]唐山国丰钢铁有限公司轧钢厂,河北唐山063300 [2]河北联合大学冶金与能源学院,河北唐山063009 [3]河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《热加工工艺》2014年第12期120-122,共3页Hot Working Technology

摘　　要：利用Gleeble-3500热模拟机压缩圆柱体试样对材料流变曲线进行研究,由于试样端面与压头之间存在摩擦,导致试样压缩过程出现鼓形,但热模拟试验机实验过程应力的计算是按照完全无摩擦来计算的。通过测定压缩过程中鼓形最大直径的变化,对由摩擦造成的应力-应变曲线失真进行修正,使流变曲线更逼近实际。By using Gleeble 3500 thermal simulator compression specimen, the material flow stress was studied. As a result of friction between end surface and swage head, the specimen drum in the process of compression generates the cydariform. But in the thermal simulation experiment, the stress calculation is in accordance with no friction calculation. By the determination of the compression process change of the maximum diameter of the drum, the stress strain curve distortion is corrected. Then, the flow stress curve is closed to the actual.

关 键 词：流变曲线 摩擦修正 热模拟 

分 类 号：TG142[一般工业技术—材料科学与工程]