Transactions of Materials and Heat Treatment

Title：Extrusion-rolling composite forming process of TC4 titanium alloy large-scale ring parts

Authors： Chen Xiangang Qin Ruiting Liu Zhengwei Lei Bingwang

Unit： Inner Mongolia North Heavy Industries Group Corp.Ltd.

KeyWords： TC4 titanium alloy large-scale ring parts mechanical properties extrusion-rolling composite forming microstructure

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2025,50(3):225-230

Abstract：

The extrusion-rolling composite forming process of large-scale TC4 titanium alloy ring parts effectively reduces the manufacturing cost compared with the traditional method. Therefore, through extrusion numerical simulation and scaled-down process verification, and relying on a 15000 t billet making machine and a 36000 t vertical extruder, the billet making by reverse extrusion punching and the extrusion of large-diameter thick-walled tube for TC4 alloy ingot were research and trial produced. The results show that breakthroughs are made in key technologies such as the billet making of “jacketing + insulation pad coating” for titanium alloy ingot billet making. The low-magnification structure, room temperature mechanical properties, high temperature mechanical properties (400 ℃) and other indicators of typical aircraft engine casing ring prepared by extrusion-rolling composite all meet the technical requirements, effectively solving the problems of surface wrinkles and cracks in traditional forging of titanium alloy ingot, and giving full play to the technical advantages of “three-directional compressive stress and one-time large deformation” of heavy-duty extrusion equipment to obtain large-diameter tube of TC4 titanium alloy, providing a new technical approach to solve the problems of traditional TC4 titanium alloy large-scale forgings with many forging times and poor billet quality consistency.

Funds：

作者简介：陈献刚（1984-），男，硕士，正高级工程师 E-mail：289057628@qq.com

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