| 摘要 |
PURPOSE:To allow brazing of a low m. p. without the contamination of the inside wall of a joining furnace, the contamination of the joined material and the exertion of adverse influence on the human body by constituting the brazing filler metal of substantially Ag and Cu and at least >=1 kinds of the other elements which form eutectic crystal with the Ag and Cu and satisfy specific conditions. CONSTITUTION:One or more kinds of the other elements which satisfy at least one of the conditions (a) to (d) to the Cu and satisfy at least one of the conditions (e) to (h) to the Ag are added to the Ag and the Cu. Although there may be a case in which a compd. is contained between the Ag and the Cu and these additive elements, the possession of the eutectic point of >=3 elements or the m. p. approximate to this point is possible. The brazing filler metal having <=730 deg.C m. p. is obtd. in this way and the brazing at the working temp. below 750 deg.C is possible by adding the 3rd elements to the Ag and the Cu. The joint strength thereof compares favorably with the joint strength of an Ag-Cu eutectic alloy. |
