钢管2026，Vol.55Issue(4)：13-18,6.DOI:10.19938/j.steelpipe.1001-2311.2026.4.13.18
大直径薄壁TC4钛合金无缝管的热扩管工艺研究
Research on Hot-expansion Process for Large-sized Light-wall TC4 Titanium Alloy Seamless Tube
韦娜 1霍佳 1余伟 2程知松1
作者信息
- 1. 北京科技大学工程技术研究院,北京 100083
- 2. 北京科技大学工程技术研究院,北京 100083||高效轧制与智能制造国家工程研究中心,北京 100083
- 折叠
摘要
Abstract
Addressing the problems of rapid temperature loss and low yield as met during the hot rolling of the large-sized,light-walled seamless titanium alloy tube,the hot-expansion process of the TC4 titanium alloy seamless tube is simulated with the finite element method.And the Gleeble simulator is used to conduct the short-time hi-temperature oxidation-tensile test so as to research the regularity of W.T.deviation changes of the said tube during the hot-expansion process as well as the effect of the hot-expansion temperature on the surface quality and the microstructure of the tube.It is revealed via the study that for the mother tube with coaxiality deviation,its eccentricity is increased by 8%after expansion,and its cylindricity deviation is increased by 15%.As for the mother tube with cylindricity deviation,its post-expansion W.T.eccentricity is increased by 27.9%,while outer wall eccentricity of the mother tube with coaxiality devi-ation is increased from 0 to 15.7%.Along with rise of the heating temperature of the mother tube,the microstructure of TC4 the titanium alloy tube is gradually transformed from relatively discrete granular particles to elongated needle-like structures,and becomes finer and grows to form a more complex network or interwoven structure,leading to the further cracking of the surface oxidation layer with maximum depth up to 20 μm.关键词
钛合金无缝管/热扩管/数值模拟/偏心/显微组织Key words
titanium alloy seamless tube/hot-expanded tube/numerical simulation/eccentricity/microstructure引用本文复制引用
韦娜,霍佳,余伟,程知松..大直径薄壁TC4钛合金无缝管的热扩管工艺研究[J].钢管,2026,55(4):13-18,6.
