Machining method for improving plate shape of TA5-A titanium alloy wide medium-thickness plate

Abstract

The invention discloses a machining method for improving a plate shape of a TA5-A titanium alloy wide medium-thickness plate. The method comprises the following steps: (1) a TA5-A titanium alloy plateblank is heated and forged at a temperature higher than a phase change point; then, the three-heating-number hot rolling is performed; and primary straightening is performed; (2) the TA5-A titanium alloy plate blank is heated and secondarily straightened in sequence after primary straightening to obtain a TA5-A titanium alloy wide and large medium-thickness plate with unevenness not more than 8 mm / m; and the size (thickness*width*length) of the TA5-A titanium alloy wide medium-thickness plate is (10-30 mm)*(2000-2500 mm)*(5000-7000 mm). The method combines high-temperature large deformation hot rolling with reversing hot rolling, reasonably distributes the rolling reduction and the rolling gates, improves the rolling efficiency, reduces the anisotropy of the plate blank, improves the nonuniform deformation phenomenon of the plate blank in the rolling process, effectively reduces the unevenness of the plate blank, and finally obtain the TA5-A titanium alloy wide medium-thickness platewith the excellent plate shape.

Description

technical field [0001] The invention belongs to the technical field of plate processing, and in particular relates to a processing method for improving the shape of a TA5-A titanium alloy wide medium-thick plate. Background technique [0002] Titanium alloy has good physical properties, machinability and seawater corrosion resistance, and is an ideal metal structure material for ships. The research and practical application level of marine titanium alloys in Russia, the United States, Japan and other countries are in the forefront of the world, and they have their own special marine titanium alloy systems, such as пT-XM series, Ti-Mo-Ni series and Ti-Al-V series, etc. . With the development of shipbuilding industry technology and the development of aircraft carrier manufacturing plans, the demand for titanium materials in my country's shipbuilding field is increasing day by day. At present, the amount of titanium alloy used in Chinese ships is relatively small compared wit...

AI Technical Summary

Problems solved by technology

TA5-A titanium alloy has a large deformation resistance during hot working, is very sensitive to rolling temperature, and has a narrow applicable temperature range, so the rolling method and rolling temperature will affect the shape of the TA5-A titanium alloy sheet

When the finished product width is less than 2000mm, the conventional rolling method has a good control over the shape of the TA5-A titanium alloy plate, but when the production size is (10mm~30mm)×(2000mm~2200mm)×(5000mm~7000mm) For TA5-A titanium alloy wide medium and heavy plates, the rolling method and rolling temperature have a great influence on the plate shape of TA5-A titanium alloy plate, and the conventional rolling method is no longer suitable for TA5-A titanium alloy wide plate Preparation of medium and thick plates