High-energy beam hybrid welding method for stainless steel cooling plate

Abstract

The invention discloses a high-energy beam hybrid welding method for a stainless steel cooling plate. The method comprises the following specific steps that the welding seam positions of the surface and the end face of a stainless steel flow channel cover plate and a bottom plate are ground to expose metallic luster, after wiping is carried out to remove residues, drying is carried out, the flow channel cover plate and the bottom plate are assembled, the flow channel cover plate is riveted by adopting a riveting cone, dotting and fixing are sequentially carried out at intervals, welding seams formed by the assembled flow channel cover plate and bottom plate are symmetrically and intermittently pre-welded through coaxial high-speed scanning laser welding, coaxial scanning laser intermittent welding is carried out on the welding seams on the two sides of the cover plate along a welding seam track, the welding surface is wiped again, and a welded workpiece is loaded into a vacuum electron beam welding chamber. According to the high-energy beam hybrid welding method for the stainless steel cooling plate, the warping phenomenon in the welding process can be avoided, the gap assembling requirement of the cover plate and the bottom plate is lowered, the phenomena of incomplete fusion, sinking and the like in the vacuum electron beam welding process are reduced, and the welding quality is improved.

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.

Images