銅の硬ロウ付接合部の引張強さ

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Many papers have been reported about the tensile strength of steel brazed joints, but little about the tensile strength of copper brazed joints. We have found out the tensile strength of electric copper joints butt-brazed with brazing filler metals of Ag-P-Cu, Ag-Cu-Zn-Cd and Cu-Zu systems at the room and elevated temperatures. Then we have examined the relation between joint clearance and tensile strength of joints. We have also examined their fracture. The conclusions are as follows : 1) As to the tensile strength at the room temperature, the joints brazed with Ag-P-Cu systems are of less strength than copper base metal. The joints brazed with Ag-Cu-Zn-Cd systems increase their strength with Ag-content in the brazing filler metals, and the joint brazed with BAg-la is the same with base metal in tensile strnegth. The tensile strength of the joints brazed with Cu-Zn systems is the lowest of all. 2) As to the tensile strength at elevated temperatures, the joints brazed with BCuP-2 and BCuP-5 are of less strength than base metal below 300℃, and are the same at 400℃. The joint brazed with BAg-la is as strong as base metal at any temperature. 3) The tensile strength of brazed joints is not related to joint clearance but to mechanical properties of brazing filler metals, i.e. when mechanical properties of brazing filler metals are the same with those of base metal, the joints with the brazing filler metals areas strong as base metal. 4) The joints whose tensile strength is less than that of base metal begin to fracture at the interface between base metal and brazing filler metal.
社団法人溶接学会の論文
1964-06-25

銅の硬ロウ付接合部の引張強さ

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