| 摘要 |
PURPOSE:To reduce the consumption of a flux and to prevent the deterioration in the quality and performance of a brazed product due to the residue of the excess flux by applying a material obtained by dispersing and mixing a flux into the polybutene of specified structure on the surface of aluminum. CONSTITUTION:When aluminums are brazed, the material, obtained by dispersing and mixing a flux in the polybutene, a polymer consisting essentially of isobutylene, having a double bond on its terminal and expressed by the formula, is applied on the surface of at least one aluminum between a couple of aluminums to be brazed, and the couple of aluminums are heated in a nonoxidizing atmosphere to melt the solder between the aluminums. Since the polybutene to be used as the dispersion medium of the flux has a sufficiently higher viscosity than water, the material can be applied only on the part to be brazed requiring the flux, hence the consumption of the flux can be reduced, and the flux residue after brazing is decreased. |
