A superplastic titanium alloy

Abstract

A superplastic titanium alloy relates to a β-rich α+β titanium alloy, which is suitable for preparing structural parts with complex shapes. The weight percent composition of the alloy is: Al: 3.5% to 5.5%, V: 2.2% to 3.7%, Mo: 0.5% to 3.5%, Fe: 0.5% to 3.5%, Zr: 0.5% to 3.5%, and the balance Ti and inevitable impurity elements. The alloy is forged into a blank at a temperature of 1050°C-1150°C, the deformation of the fire is 60%-78%, the forging temperature of the finished bar is controlled at 930°C-980°C, and the final forging or final rolling temperature is 780 ℃-830℃, the plate rolling temperature is controlled at 600℃-650℃, and the finished plate is used in a cold-rolled state. Compared with existing titanium alloys, under the premise of maintaining good comprehensive properties at room temperature, the superplastic temperature of this alloy can be greatly reduced, and it is easy to form parts with complex shapes at lower temperatures, and the production cost is greatly reduced. meet the needs of industrial production.

Description

A kind of superplastic titanium alloy technical field A kind of superplastic titanium alloy, relates to a kind of α+β titanium alloy that is rich in β, and this alloy is applicable to aerospace, automobile The production of some complex shape components such as parts, handicraft manufacturing, and instrumentation shell covers, as well as the production of rods and plates And wire used in other fields. Background technique [0002] Titanium alloys are widely used in aerospace, chemical industry, ships, medical and other sectors are widely used, but its cutting performance is poor, especially when it is made into complex shapes like aircraft structural parts. Parts, the yield rate is very low. Superplastic processing is very effective in improving its yield. Prepared by superplastic processing The development of titanium alloys with good comprehensive properties has become one of the hot research directions. In recent years, superplastic forming (SPF) in titanium Th...

AI Technical Summary

Problems solved by technology

β-alloy, either the superplasticity temperature ...