钛合金无缝管热连轧温度场模拟

Temperature Field Simulation of Titanium Alloy Seamless Pipe in Hot Continuous Rolling

摘要:

采用有限元法分析了钛合金无缝管多机架连轧下的温度状态。模拟结果表明：随轧制道次的增加，辊底下的外表面温度以逐渐减缓的速率降低，中心温度整体上以逐渐减缓的速率上升，而辊缝下外表面温度持续升高。中心温度的周向不均匀性在奇数道次时减小，在偶数道次时增大，而外表面温度分布的不均匀性与此相反。前一机架压下量与后机架辊缝处温升呈负相关，降低前一机架压下量可显著提升后机架周向温度不均匀性。温度测量和晶粒形貌分析的结果表明，模拟结果与实验结果吻合度较高。

Abstract:

The finite element method was adopted to analyze the temperature state of titanium alloy seamless pipe during the multi-stand continuous rolling. The simulation results show that with increasing the rolling passes, the outer surface temperature under the groove vertex is decreased at a gradually reducing rate, the center temperature is basically increased at a gradually reducing rate, and the outer surface temperature under the groove taper is continuously increased. The circumferential unevenness of center temperature is decreased in odd passes and increased in even passes. However, the unevenness of temperature distribution on the outer surface has opposite variation trend. The rolling reduction of the front pass shows a negative correlation with temperature rise at the groove taper of the next pass. In addition, decreasing the rolling reduction of the former pass can significantly improve the circumferential temperature unevenness of the next pass. The results of temperature measurement and grain morphology show that the simulation results are in good agreement with the experiment results.