A kind of stainless steel cooling plate high-energy beam composite welding method

Abstract

The invention discloses a high-energy beam composite welding method for a stainless steel cooling plate. The specific steps are as follows: polish the surface, end face and weld seam position of the stainless steel flow channel cover plate to expose the metallic luster, wipe and remove the residue and then dry it; The bottom plate is assembled, and the flow channel cover plate is riveted with riveting cones, and fixed at intervals in each order. The weld seam formed by the assembled flow channel cover plate and the bottom plate is symmetrically and intermittently pre-welded by coaxial high-speed scanning laser welding. And along the welding seam track, carry out coaxial scanning laser intermittent welding on the welding seam on both sides of the cover plate, wipe the welding surface again, and put the welded workpiece into the vacuum electron beam welding chamber. This kind of stainless steel cooling plate is welded with high energy beam The method can avoid the warping phenomenon in the welding process, reduce the gap assembly requirements between the cover plate and the bottom plate, reduce the non-fusion, depression and other phenomena in the vacuum electron beam welding process, and improve the welding quality.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a high-energy beam composite welding method for a stainless steel cooling plate. Background technique [0002] 304 stainless steel, as the most widely used chromium-nickel stainless steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. In addition, it has good hot workability such as stamping and bending, no heat treatment hardening phenomenon, and good weldability. It is widely used in plate heat exchangers, bellows, water heaters, boilers, auto parts, ship parts, etc. [0003] The welding of stainless steel parts such as liquid cooling modules and water cooling channels used in the aerospace field adopts the vacuum electron beam welding method for sealing welding of cooling plate parts. Due to the particularity of the aerospace field, the weld seam after welding The sealing and flatness requirements are extremely ...

AI Technical Summary

Problems solved by technology

However, due to the welding heat process and the existence of assembly gaps, although there are riveting and spot welding processes, the cover plate will still be warped during the deep penetration welding process.

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