【摘要】：采用Deform-3D對(duì)TA1等通道角擠壓過程進(jìn)行數(shù)值模擬,分析材料變形過程的流動(dòng)規(guī)律、等效應(yīng)力應(yīng)變分布情況及載荷變化情況。結(jié)果表明,材料在模具通道轉(zhuǎn)角處發(fā)生劇烈塑性變形,成形載荷迅速增大,整個(gè)擠壓過程載荷波動(dòng)劇烈,截面上應(yīng)力應(yīng)變分布不均勻。進(jìn)行了等溫等通道角擠壓變形試驗(yàn),結(jié)果表明,TA1在400℃下經(jīng)等通道角擠壓后零件表面光順,無起皺破裂現(xiàn)象;材料的抗拉強(qiáng)度由擠壓前404 MPa提高到585.24 MPa,材料顯微硬度由211.49 HV提高到261.32 HV。金相結(jié)果顯示,粗大的原始晶粒擠壓后明顯細(xì)化,在晶粒內(nèi)部存在少量變形孿晶。
[Abstract]:The numerical simulation of TA1 equal channel angular extrusion process was carried out by Deform-3D. The flow law, the distribution of equivalent stress and strain and the change of load in the deformation process of the material were analyzed. The results show that the material has severe plastic deformation at the turning angle of the die channel, the forming load increases rapidly, the load fluctuates violently in the whole extrusion process, and the stress-strain distribution on the cross-section is not uniform. The deformation test of isothermal channel angular extrusion is carried out. The results show that the surface of the parts is smooth and there is no wrinkling and cracking phenomenon when TA1 is extruded at the same channel angle at 400 鈩，

本文編號(hào)：2462955