TC4 titanium alloy solid welding wire for large-thickness ultra-narrow-gap laser wire filling welding and preparation method thereof

Abstract

The invention discloses a TC4 titanium alloy solid welding wire for large-thickness ultra-narrow-gap laser wire filling welding and a preparation method thereof. The invention belongs to the technical field of welding materials. The invention provides the TC4 titanium alloy solid welding wire for large-thickness ultra-narrow-gap laser wire filling welding and the preparation method thereof. The solid welding wire is prepared from chemical components in percentage by mass as follows: 5.0%-7.0% of Al, 4.0%-6.0% of V, 1.5%-2.5% of Mo, 0.2%-0.5% of Cr, 0.5%-1.5% of Zr and the balance of Ti. The method comprises the following steps: weighing raw materials according to the chemical components of the welding wire, mixing the raw materials, pressing into an electrode block, welding into a consumable electrode, carrying out primary smelting to obtain a primary cast ingot, carrying out secondary smelting to obtain a titanium alloy cast ingot, turning a skin, cutting a dead head, forging into a square billet, rolling, drawing, straightening and polishing to obtain a wire material, carrying out vacuum annealing, carrying out drawing diameter reduction, stress relief annealing and cleaning in a vacuum tube type annealing furnace, winding on a wire reel, and vacuum plastic packaging to obtain the large-thickness ultra-narrow-gap TC4 titanium alloy solid welding wire for laser wire filling welding.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a TC4 titanium alloy solid welding wire for laser wire-filled welding with large thickness and ultra-narrow gap and a preparation method thereof. Background technique [0002] TC4 titanium alloy is widely used in marine drilling, pressure vessels, deep submersibles, Nuclear submarines, aerospace ships and weapons and equipment and other fields. As early as the 1980s, the U.S. coastal defense construction army had begun to use titanium alloy materials to manufacture ocean-going transport ships, which greatly improved its service life and stability, and reduced maintenance costs. In recent years, the proportion of titanium alloy materials used in the manufacturing of deep sea space workstations in many western developed countries has been increasing. Compared with the overall stamping forming, the welding preparation process is small, the cycle is short, the...

AI Technical Summary

Problems solved by technology

Laser wire-filled welding has the advantages of narrow welding heat-affected zone and concentrated welding energy of laser welding, and at the same time, due to the metallurgical effect of filler metal, it can supplement the metallurgical burning loss of beneficial elements, which can refine the structure and grain, improve Comprehensive performance plays an important role. Based on the characteristics and advantages of laser filler wire welding, the existing welding wire cannot fully meet its use requirements, so a new welding wire with high welding efficiency, good molten pool flow and spreadability, less spatter in the welding process, and There is no oxide and welding fume adhesion on the surface of the welding seam, and it is suitable for large thickness ultra-narrow gap laser wire filler welding. Solid welding wire is very important for improving the application range of large thickness titanium alloys.

Images