Method for connecting target and rear panel through fusion welding

• Main Authors: XIONG XIAODONG, SHANG ZAIYAN, HE JINJIANG, JIANG XUAN, WANG XINPING, LIAO ZAN, YANG YAZHUO
• Format: Patent
• Language: Chinese; English
• Published: 17.03.2010
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention belongs to a method for connecting a target and a rear panel through fusion welding, which comprises the following steps of: firstly, coarsening at least one surface to be connected of the target and the rear panel; secondly, pressing the target and the rear panel together; and finally, performing distributive penetration fusion welding from the surface of the rear panel with high energy beams, such as electronic beams and laser beams so as to weld the rear panel and target component together. The method utilizes the characteristics of the high energy beams of intensive energy density, good controllability, high depth-to-width ratio of welding lines and the like, and can directly and thoroughly weld the rear panel; and the welding lines which are formed by welding the rear panel and the target material have high bonding strength and small heat affected zone. In a distributed discontinuous welding mode, the method solves the problems such as growth of crystalline grains caused by suddenly raised