中文摘要：

运用有限元软件DEFORM-3D对多道次（1～4道次）不同挤压路径（A、Ba、Bc、C）工件间推挤式等通道转角大应变技术进行了模拟,并进行了实验研究,重点分析了加工道次、挤压路径对应变大小、接触应变区尺寸（体积）、应变均匀性的影响规律。结果表明,随着挤压道次的增加,应变大小稳步增加且受挤压路径的影响较小,接触区（端部应变区）在Bc路径下其尺寸（体积）最小。4道次后工件的应变均匀性以Bc路径最佳,但是应变均匀性总体上都随挤压道次的增加而降低。

英文摘要：

Large strain technology of equal channel angular multi-passes （1-4 pass） with the different routes （route A, tla, Bc and C）of workpieces pushing type ECAP was simulated by using the finite element software Deform-3D. And experimental study was carried out. The effects of the pressing pass and extrusion route on effective strain, the workpieces contacting strain zone size （volume） and strain uniformity were mainly analyzed. The results show that with increase of extrusion pass, the size of strain increases steadily and influence is little by extrusion route. The size （volume） on contact region under route Bc is minimum. The strain uniformity of the workpiece by route Bc after g passes is optimum, but as a whole, the strain uniformity decreases with the increase of extrusion pass.