Hot bending process and microstructure properties on low-cost titanium alloy thick plate
For a new type low-cost titanium alloy TC4LCA,the influences of forming temperature,holding time and bending radius on the forming accuracy,microstructure and mechanical properties of TC4LCA V-shaped parts were studied by bending experiments of V-shaped parts.The results show that with the increasing of forming temperature from 700℃to 800℃and holding time from 5 min to 25 min at bending radius of t,the springback angle of the bent part decreases from 16'to 0',and the wall thickness reduction rate increases from 2.6%to 5.8%.The Vickers hardness and strength both decrease slightly,and the performance reaches 90%of the base material.Under the condition of forming temperature of 750℃and holding time of 15 min,when the bending radius decreases from 2.0t to 0.5t,the wall thickness reduction rate of the part increases from 2.3%to 6.7%,and the springback angle increases from 2'to 9'.The research results provide a basis for rational design of hot bending process parameters for low-cost TC4LCA titanium alloy V-shaped parts,and reduce the costs while ensuring the service performance of titanium alloy parts to expand their application range.
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