Transactions of Materials and Heat Treatment

Title：Optimization on shape parameters of continuous variable cross-section recycled extrusion for bulk material

Authors： Du Zhongze Wu Chen Wang Qingjuan Lu Chao Liu Changrui

Unit： Xi′an University of Architecture and Technology

KeyWords： bulk material continuous variable cross-section recycled extrusion shape parameters metal flow upsetting

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2017,42(11):55-61

Abstract：

The extrusion and recovery upsetting deformation of as-cast plumbum bulk with rectangle cross section were realized by continuous variable cross-section recycled extrusion（CVCE）, and the influences of shape parameters including height-diameter ratio of original billet and extrusion angle on external form and internal metal flow law of bulk after deformation were investigated. The results show that the combined effects of metal flow along the radial and lateral metal flatting lead to bottom area enlargement of top surface after upsetting by CVCE process, which permeates in sequence from up to down and decreases layer by layer. From up to down，the compression of each layer gradually decreases for the transmission effects of deformation produced by the extrusion on billet in vertical direction. When the compression angle is 6° and the height-diameter ratio of original billet is 1.83,the effect of recovery to original shape after cyclic extrusion is the best, and the product is of better-quality surface and uniform metal flow.

Funds：

国家自然科学基金资助项目（51104113）

作者简介：杜忠泽（1968-），男，博士，教授 E-mail：duzhongze126.com 通信作者：吴晨（1993-），女，硕士研究生 E-mail：386729645@qq.com

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