钛合金无缝管斜连轧新工艺研究

New Process Research on Tandem Skew Rolling of Titanium Alloy Seamless Tube

摘要:

针对钛合金材料热轧温度范围窄、温降快、变形抗力大等特点,本文将钛合金与无缝管斜连轧新工艺有机结合并开展系统研究；根据斜连轧工艺结构与特点,分别构建连轧过程速度模型、轧制力模型与张力模型；通过有限元数值模拟研究钛合金斜连轧过程金属变形机理、分析金属流动规律,获得其应力应变场、温度场、速度场分布规律,基于有限元模拟进行现场实验研究。结果表明：初轧温度1050℃、合理匹配穿孔段与轧管段参数的情况下,可成功制备钛合金无缝管,且尺寸精度高、无明显表面缺陷。理论及实验分析证明斜连轧新工艺完全适用于钛合金无缝管材制备,同时缩短生产流程,提高生产效率。

Abstract:

In view of the characteristics of narrow hot rolling temperature range, rapid temperature drop and large deformation resistance of titanium alloy , titanium alloy and the new technology of seamlessStube Tandem Skew Rolling was combined and systematic research was carriedSout in this paper. According to the process structure and characteristics, the speed model, tension model and rolling force model of TSR were described,the deformation mechanism and the metal flow law of titanium alloy in TSR process was studied by finite element numerical simulation,the distribution of stress and strain field, temperature field and velocity field were obtained, and the field test was conducted based on finite element simulation. The results show that when the temperature is 1050℃ and the parameters of the piercing section and rolling section are matched reasonably, the seamless titanium alloy tube can be successfully obtained with high dimensional accuracy and no obvious surface defects. The theory and experimental analysis show that the TSR process is completely suitable for the preparation of seamless titanium alloy tube, and the production process is shortened and the production efficiency is improved.