Dissimilar metal laser cladding welding device and method

Abstract

The invention discloses a dissimilar metal laser cladding welding device and a dissimilar metal laser cladding welding method. A powder feeding device; the gas source is used for providing protective atmosphere into the powder feeding device; the cladding device is used for providing heat for the surface of the workpiece to enable the alloy powder to react with the surface of the workpiece; a conveying channel of the powder feeding device is fixed relative to the cladding device; a control system; and the powder screening device, the powder feeding device and the cladding device are respectively connected. According to the method, a heat source is adopted for melting metal powder, the molten metal powder enters the lap welding upper metal test plate, and the mechanical property of a welding seam is improved by controlling the adding amount of the metal powder in an upper metal molten pool and adjusting welding heat input; the variety, thickness and number of phases at the joint of the dissimilar metal interfaces are regulated and controlled, and the dissimilar metal connecting structure is further expanded; the welding method is simple, and batch production is facilitated.

Description

technical field [0001] The invention relates to a welding device and method, in particular to a dissimilar metal laser cladding welding device and method. Background technique [0002] With the further demand of economic development and technological innovation, new materials, new structures, and new processes are constantly being introduced. Dissimilar metal structural parts can meet the performance requirements of different parts, especially the parts with special requirements for corrosion, wear, strength and other properties. In addition, when dissimilar metals are welded, cheap metals can also be used to replace some precious or rare metals, saving production costs. However, after dissimilar metals are welded, their properties and structures are quite different. For dissimilar metals that are easy to form intermetallic compounds, such as aluminum alloy / steel, titanium alloy / steel, it is easy to form a large number of various brittle phases after welding, which affects...

AI Technical Summary

Problems solved by technology

However, after dissimilar metals are welded, their properties and structures are quite different.

For dissimilar metals that are easy to form intermetallic compounds, such as aluminum alloy / steel, titanium alloy / steel, it is easy to form a large number of various brittle phases after welding, which affects the mechanical properties of the joint; and for dissimilar metals that do not react and are difficult to solidify, such as magnesium alloys / Steel, magnesium alloy / titanium alloy, difficult to achieve metallurgical connection after welding, no connection medium

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