带背压等径角挤压挤压力上限解析  

An upper-bound solution to extrusion force of equal channel angular pressing with back pressure

作　　者：李永志[1,2] 薛克敏[1] 李萍[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]九江学院机械与材料工程学院,九江332005

出　　处：《塑性工程学报》2011年第2期28-32,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50875072);霍英东教育基金资助项目(121053);安徽省优秀青年科技基金资助项目(10040606Y21)

摘　　要：等径角挤压过程中施加背压,可以有效地改善材料微观组织和力学性能。运用上限理论推导出了带背压等径角挤压的挤压力解析式,结合实验进行验证,分析了背压作用的影响因素及背压效果,为等径角挤压的工艺优化、背压施加方式、模具设计及设备选择,提供了可行的方法。Applying back pressure during equal channel angular pressing（ECAP） may improve the process for better control of microstructure and property,An upper-bound solution to extrusion force of equal channel angular pressing with back pressure during a single pass was derived and verified with experiments.The effecting factors and effect of back pressure were discussed.The results provide a feasible method for ECAP process optimization,tooling design and equipment selection.

关 键 词：等径角挤压 背压 上限解 挤压力 

分 类 号：TG371[金属学及工艺—金属压力加工] TG375.4