Machining method for thin-walled titanium alloy tube

Abstract

The invention discloses a machining method for a thin-walled titanium alloy tube. The method includes the steps that a titanium rod is selected according to the diameter of a finished tube, heated to910+ / -2 DEG C and perforated to obtain a tube blank with the same diameter; then, the temperature is controlled to be 870+ / -2 DEG C, and perforation is performed a second time to increase the diameterand reduce the wall thickness; at least three passes of cold rolling are performed to obtain the finished product, wherein the ratio of the inner diameter reduction to the wall thickness reduction ofthe tube blank in each pass is controlled to be 1-22.5 in a successively increased manner, and the pass machining rate of rolling is 40%-67%; and after each pass of rolling, deoiling and pickling areperformed, the titanium tube is washed after pickling, drying is performed after thorough washing, vacuum heat treatment is performed after drying, and the titanium tube is straightened after vacuumheat treatment. Through the technology, the machining process is short, the material consumption is small, and the yield is high. The ultrathin-walled titanium tube prepared by the method has the outer diameter of 55 mm-100 mm and the wall thickness of 0.2 mm-0.8 mm, and the ratio of the wall thickness to the outer diameter is not greater than 0.008.

Description

technical field [0001] The invention belongs to the technical field of titanium tube production and processing, and in particular relates to a processing method for a titanium alloy thin-walled tube. Background technique [0002] With the rapid development of modern science and technology and the needs of national economic construction, the demand for various titanium tubes in various industrial sectors is increasing day by day, and the specifications and technical requirements for titanium tubes are also getting higher and higher. Especially with the needs of the development of the market economy, all walks of life require more titanium tubes of various specifications. Although the uses of titanium tubes vary, the overall requirements for titanium tubes are the same, that is, both processing conditions and end uses require titanium tubes to have the required dimensions, precision, corresponding performance, and surface finish suitable for this purpose. Various quality indi...

AI Technical Summary

Problems solved by technology

[0004] The traditional process uses low-temperature secondary piercing. For example, the finished product requires a Φ89×0.6 tube. The traditional process uses a Φ130×12 tube blank. After multiple rolling processes, Φ122×9, Φ115×8.5, Φ108×4.5, Φ102 ×3.5, Φ92×2, Φ93×1, finally get the finished product Φ89×0.6, a total of 7 processes are required, the production cycle is long, and the yield is low