Preparation method of Ti-6Al-4V alloy welding wire suitable for repair welding of titanium alloy casting

Abstract

The invention relates to a preparation method of a Ti-6Al-4V alloy welding wire suitable for repair welding of a titanium alloy casting and belongs to the technical field of nonferrous metal material preparation. The preparation method comprises the steps that S1, alloy welding wire raw materials are mixed and pressed into electrodes, and an alloy cast ingot is formed through smelting; S2, homogenizing annealing is conducted; S3, billet forging is conducted; S4, forging is conducted, and flaw detection is conducted through ultrasonic waves; S5, large deformation is conducted once, rolling is conducted twice, and heating and heat preservation are conducted; S6, hot drawing and finishing rolling are conducted, and surface treatment is conducted; S7, temperature-control hot drawing is conducted; S8, annealing is conducted after cold drawing; and S9, sliding block straightening is conducted, straightening and cutting-off are conducted, and a finished product is obtained through stress relief annealing and polishing. The preparation method has the beneficial effects that nonuniformity, caused by quenching, of alloy components and structures in the caisting process is eliminated; and the contaminated surfaces of wire materials are removed in a centerless grinding mechanical mode, surface impurities are removed, further corrosion of the surfaces of the wire materials is prevented during subsequent storage, and the quality of the wire materials is stabilized and improved easily.

Description

technical field [0001] The invention belongs to the technical field of preparation of nonferrous metal materials, and relates to a preparation method of a Ti-6Al-4V alloy welding wire suitable for repair welding of titanium alloy castings. Background technique [0002] Titanium alloy has the advantages of low density, high specific strength, high temperature resistance, corrosion resistance, and weldability. It is the best material for aviation and aerospace vehicles to reduce weight and improve overall performance. In recent years, the use of titanium alloys on aircraft at home and abroad has increased significantly, and the use and level of titanium alloys have become an important indicator to measure the advanced level of aerospace technology and aircraft performance. [0003] Precision casting is an advanced manufacturing technology for titanium alloy parts. It has unique advantages in improving material utilization, reducing structural weight, reducing costs, and expand...

AI Technical Summary

Problems solved by technology

Compared with relevant domestic technical requirements, it can be seen that the production control and quality level of welding wire are far from meeting the requirements of the internationally recognized technical standard AMS4954 for titanium alloy welding wire, resulting in high-end welding wire, especially titanium alloy welding wire for aerospace, basically relying on imports

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