TH68929B - Brazing sheets are used for flux-free brazing and are manufactured. - Google Patents

Abstract

DC60 (10/07/57) brazing sheet is used for flux-free brazing of core materials. Brazing material that has been supplied Placed at least on one side of the above core material. And thin-skinned materials, which have been placed on the above brazing materials with specific characteristics: The above core materials are made of high melting point aluminum alloy. Than the above hard solder material The above brazing material is made from Al-Si-Mg alloys and has a thickness of 25 ~ 250 microns. Aluminum alloy does not mix Mg and has a thickness of 5 ~ 30 microns. Oxides, which are located in the boundary plane of the above solder material to the above thin-skin materials, have a weight ratio of not more than 0.1ppm when all coatings are used as criteria. This invention can maintain the Solder evenly And enable stable welding Connect the brazing sheet for soldering. Solid without flux with a thin surface material.

Claims (5)

Disclaimer (all) which will not appear on the advertisement page: page 1 of the number 1 disclaimer 1. Brazing Sheet is used for flux-free brazing consisting of a core material, a brazing material that has been classified. Placed at least on one side of the above core material. And a thin-skinned material, which has been placed on the substrate, with the specific characteristics The core material is made of aluminum alloy, the melting point is higher than the above brazing materials. The above brazing materials are made of Al-Si-Mg alloys and have a thickness of 25-250 μm. Controlled to mix Mg below 0.05% by mass and 5-30 μm thick. The above thin-skinned materials are welded to the above brazing materials with a coating iron. The mixed content of oxides located on the boundary plane of the above solder material to the surface material. Some of the above have a mass ratio of not more than 0.1 ppm when using all coatings as a criterion. 2. Breching sheet is used for flux-free brazing according to claim 1 where the brazing material is Al-Si-Mg alloy with a mixture of 5-13% Si by mass and 0.2-1.5% Mg. By mass 3. Breching sheet is used for flux-free brazing according to claim 1 or claim 2 on thin-skinned materials. It is pure Al alloy or Al-Mn group alloy. 4.Bressing Sheet's manufacturing method is used for flux-free brazing in accordance with Clause 1 to Claim 3, any one of which has specific characteristics: There is a process wherein the diode of the core material, the diode of the brazing material, the Al-Si-Mg alloys, and the diode of the thin substrate are stacked. And manage to eliminate the oxide film on the surface of the plane which is mechanically or chemically in contact with the thin material Connect the brazing material to the Al-Si-Mg group before dosing. 5.Brezingsheet's manufacturing method is used for flux-free brazing in accordance with Clause 1 to Clause 4, one of which has specific characteristics: There is a pre-coating process in which the diode of the hard brazing material is deposited, the Al-Si-Mg alloys and the thin substrate are made into the coating. With a process in which the pre-coating is bonded to the core material by heating the metal overlap. The surface oxide film of the plane which was exposed to the thin substrate, mechanically or chemically with Al-Si-Mg alloy brazing material was eliminated before the coating process was performed.