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基于ABAQUS软件，对不同工艺参数下非等截面钛合金型材热拉弯蠕变过程进行了仿真建模，研究了筋条对非等截面型材温度场及各项参数对型材成形精度的影响。探究了非等截面型材的材料流动行为及应力应变演化规律并优化了各项参数的取值范围。结果表明，优化后的参数范围为成形温度700～750℃、预拉量0.4%～0.6%、包覆变形系数0.7和应力松弛时间20～30 min。基于工艺参数优化结果对挤压TC4非等截面钛合金型材进行了电辅助热拉弯蠕变试验验证。热拉弯蠕变试验结果表明，基于取值范围的优化结果选取工艺参数，能够获得良好的成形精度。
Abstract：Based on ABAQUS software, simulation modeling for the hot stretch bending and creep forming process of complex-section titanium alloy profiles under different process parameters was carried out. The influence of stiffeners on the temperature field of non-uniform-section profiles and the impact of various parameters on forming accuracy of profiles were investigated. The material flow behavior, stress and strain evolution patterns of non-uniform-section profiles were investigated, and the parameter ranges were optimized. The results show that the optimization range of parameters is the forming temperature of 700-750 ℃, pre-stretching amount of 0.4%-0.6%, covering deformation coefficient of 0.7 and stress relaxation time of 20-30 min. Based on the optimized process parameters, electrically assisted hot stretch bending and creep forming tests were conducted to validate the forming of extruded TC4 titanium alloy profiles with non-uniform cross-sections. Results of the hot stretch bending and creep forming test show that good forming accuracy can be obtained by selecting process parameters based on the optimization results of value range.
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基本信息:
中图分类号:TG306;TG146.23
引用信息:
[1]李哲宇,钱程,张晨,等.非等截面钛合金型材热拉弯蠕变成形工艺优化及试验研究[J].塑性工程学报,2026,33(08):135-143.
基金信息:
国家自然科学基金资助项目(52375304); 中国商飞-北航大飞机研究院创新研究基金资助项目(24010206)
2026-08-21
2026-08-21
2026-08-21