铸态铅黄铜准超塑性变形的动态再结晶模型  

The Dynamic Recrystallization Model of As-cast Lead Brass in Quasi-superplasticity Deformation

作　　者：陈拂晓[1,2] 李贺军[1] 郭俊卿[1] 肖凯[2] 

机构地区：[1]西北工业大学材料科学与工程学院 [2]河南科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第2期89-92,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50575185);河南省高校杰出科研人才创新工程资助项目(2004KYCX020)

摘　　要：采用Gleeble-1500D热力模拟试验机对铸造铅黄铜进行了压缩试验,试验条件中应变速率为0.0002～0.005s-1,变形温度为540～660℃,真应变为0.1～1.2,初始晶粒尺寸为38μm。在Sellars基本模型的基础上,通过对试验数据进行回归,建立了铸态铅黄铜动态再结晶模型,并用Deform-3D软件模拟了铜合金轴承保持架准超塑性成形过程中的动态再结晶,模拟结果与试验所测的数据吻合,表明所建立的铸态铅黄铜动态再结晶模型具有实用性。The compression test of as-cast lead brass was conducted by thermal/mechanical simulating testing machine,Gleeble-1500D,with the strain rate of 0.000 2~0.00 5 s-1 at 540~660 ℃ and the initial grain size of 38 μm and true strain at 0.1~1.2.Based on the Sellars model,the model of dynamic recystallization(DRX) has been established by experimental data regression,and then the DRX in the solid cages during quasi-superplastic extruding process has been simulated by Deform-3D software,which is well in agreement with the practical ones,showing the availability of the established model.

关 键 词：铸态铅黄铜 动态再结晶 动态再结晶模型 准超塑性 

分 类 号：TG291[金属学及工艺—铸造]