α+β钛合金的热加工动态行为模拟——探求最优热加工条件

来源期刊：中南大学学报(自然科学版)1990年第1期

论文作者：周宏 丁道云 唐远永

文章页码：66 - 72

关键词：钛合金； 金属加工； 热变形

Key words：titanium base alloys； metal working； hot deformation

摘    要：

利用一种新的材料动态行为模拟方法,模拟了Ti-4.5Al-5Mo-1.5Arα+β钛合金的热加工动态冶金过程。测定其预先形成的α+β和β两种组织在热加工过程的行为,得出最优的热加工条件为870℃和ε=10^-3s^-1。若提高应变速率时,对α+β组织则以940℃以上和ε=10°s^-1为好;对β组织则以900℃以上和ε=10^-1s^-1为好。

Abstract:

A new method of modeling the dynamic material behavior has been applied to the dynamic metallurgical process occurring during hot deformation of Ti-4.5Al-5Mo-1. 5Cr α+β titanium alloy. The behavior of α+β and β preform microstrucfures has been examined and the results show that the optimum condition for hot deformation is obtained at 870℃ and ε= 10^-3s^-1. When strain rate is increased, then the optimum condition is above 900℃ and ε= 10°s^-1 for α+β, above 900℃ and ε= 10^-1s^-1 for β.