铬钼钢无缝储氢容器旋压工艺研究

Spinning Process of Chromium-Molybdenum Steel Seamless Hydrogen Storage Vessel

针对储氢用无缝容器由于设计压力较高和壁厚较大而导致旋压成型困难的问题,课题组采用ABAQUS建立了无缝容器多道次热旋压数值计算模型,探讨了热旋压过程中应力应变演化规律以及厚度的影响。针对壁厚较厚的无缝储氢容器,分析了进给量、圆角半径和温度对旋压过程的影响规律,并提出了优化建议。研究表明:随着厚度增加,容器成型后等效塑性应变增加,成型难度加大;适当减少进给量、增加旋轮圆角半径或提高温度均有利于厚壁容器旋压成型。最终得到了50 MPa储氢容器的热旋压工艺参数,即进给量10 mm,旋轮圆角半径50~60 mm,温度1100℃,为实际生产提供了参考。

Aiming at the difficulty in spinning forming of seamless hydrogen storage vessels caused by the relatively high design pressure and wall thickness,a numerical simulation model of multi-pass hot spinning of a seamless vessel was established by ABAQUS,the evolution law of the stress-strain and the influence of thickness during hot spinning process were analyzed.The influence of key process parameters such as feed,roller fillet radius,and temperature on spinning forming process was also analyzed for seamless hydrogen storage vessel with thick wall,and optimization suggestions were proposed.The results show that as the thickness increases,the equivalent plastic strain after forming the vessel increases,and the forming difficulty increases.Appropriately reducing the feed,increasing the roller fillet radius,or increasing the temperature are beneficial to the spinning forming of thick-walled vessels.Finally,the hot spinning process parameters of the 50 MPa hydrogen storage vessels are obtained,that is,the feed amount is 10 mm,the roller fillet radius is 50~60 mm,and the temperature is 1100℃,which provides a reference for the actual production.