Warm-rolling process method of titanium alloy thin plate

Abstract

The invention provides a warm-rolling process method of a titanium alloy thin plate and comprises the following steps: firstly, heating a titanium alloy thin plate with a certain thickness up to 300-400 DEG C; secondly, preheating a roller of a rolling mill to 30-60 DEG C; warm-rolling the heated titanium alloy plate for 1-3 turns, and obtaining the rolled slab; and thirdly, orderly performing the finished product annealing, acid washing and fixed-dimensional shearing, obtaining the titanium alloy thin plate with the thickness of 1.2-3 mm. In the invention, the titanium alloy plate is delivered to the preheated rolling mill after being heated within the temperature scale of lower than the recrystallization temperature, in order to perform the warm-rolling; compared with the cold-rolling process technique, the invention can slow down the hardening rate of the titanium alloy, improve the accumulated deformation rate of the rolling turn, reduce the intermediate heat treatment frequency, shorten the production cycle and improve the working efficiency; meanwhile, the method can effectively prevent edge crack, slag at head and tail parts and micro-crack, and improve the surface quality; the invention is easy to control, simple and convenient to operate and applicable to the industrial production on a large scale.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a warm rolling processing method of a titanium alloy thin plate. Background technique [0002] Titanium and titanium alloys have high specific strength, good corrosion resistance and biocompatibility, so they are widely used in aerospace, marine, shipbuilding, automobile, petrochemical and biological engineering and other fields. With the development of industrial technologies such as aviation, aerospace and ships, the demand for titanium alloy sheets is increasing, and at the same time, higher requirements are put forward for the dimensional accuracy, surface quality, plate shape and organizational properties of titanium alloy sheets. Due to the high deformation resistance of titanium alloy, the work hardening is fast during rolling, and it needs to undergo multiple intermediate heat treatments before it can be cold rolled again. The rollin...

AI Technical Summary

Problems solved by technology

Due to the high deformation resistance of titanium alloy, the work hardening is fast during rolling, and it needs to undergo multiple intermediate heat treatments before it can be cold rolled again. The rolling cycle is long and the production efficiency is low.

Moreover, edge cracks, slag drop at the head and tail, and surface micro-cracks are prone to occur during cold rolling, causing pits, slag inclusions and other defects on the surface of the plate, which seriously affect the surface quality of the finished product, and the yield is also greatly reduced.