Non-solder brass solder coating material for aluminium product

Abstract

Soldered coating material without solder of aluminum product belongs to material engineering technique field. The components and corresponding weight shares are: silica flour 30í½49úÑ, potassium aluminium fluoride 20í½30úÑ and synthetic resin. Paint the coating prepared by rolling transfer application on aluminium surface of flat separation with coating thickness under 40um; dry the coating at 150Degí½220 Deg, then it presents outstanding effect in continual CAB braze welding technique and achieves advanced level in domestic and foreign. This invention overcomes the existing complex technique, increases reliability and stability of soldered joint.

Description

technical field

[0001] The invention relates to a coating in the technical field of materials, in particular to a brazing coating material for aluminum products without solder. Background technique

[0002] Based on the application limitations of traditional coating materials, researchers at home and abroad have begun to propose the principle of diffusion brazing seam formation using the contact reaction of silicon element and aluminum material to obtain the liquid-phase brazing filler metal necessary for brazing at high temperature, so as to get rid of the brazing. Process requirements for material coating and plating. At the same time, coating technology can be used to prepare brazing flux and silicon simple substance powder into coatings and coat them on the surface of aluminum materials, simplifying the technological requirements for brazing flux coating. In the field of aluminum heat exchanger manufacturing, the technical research of preparing a new type of coating on ...