Cored copper welding wire suitable for small area brazing
A brazing wire and cored technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as unsuitable for high-efficiency brazing, and achieve convenient and reliable welder operation, high brazing efficiency, and easy absorption hot effect
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Embodiment 1
[0033] Such as figure 1 As shown, the diameter of the seamless welding wire is 2.0mm, which is divided into the outer layer homogeneous alloy solder 1 and the inner core solder 2 structurally, the inner core diameter is 1.0mm, and the weight ratio of the outer layer homogeneous alloy solder is 88%. The weight ratio of the inner core flux is 12%. The composition of the outer homogeneous alloy solder is 59% Cu, 38% Zn, 1.5% Sn, 0.8% Mn, 0.5% Ni and 0.2% Si; the inner core composition is 70% B 2 o 3 , 21% Na 2 O·2B2 o 3 , 4% CsF and 5% NaF. The butt weld of aluminum bronze rod (QAl9-4) with a diameter of 3mm is used for flame brazing, which can be directly brazed to form, without turbulent flow of brazing material, full brazing seam shape, reliable quality, and the tensile strength of the connection can reach 290MPa.
Embodiment 2
[0035] Such as figure 2 As shown, the diameter of the seam welding wire is 1.6mm, and it is divided into the outer layer homogeneous alloy solder 1 and the inner core solder 2 structurally. The inner core diameter is 0.9mm, and the weight ratio of the outer layer homogeneous alloy solder is 85%. The weight ratio of the inner core flux is 15%. The composition of the outer homogeneous alloy solder is 57% Cu, 39% Zn, 2.0% Sn, 1.2% Mn and 0.8% Ni; the inner core composition is 65% B 2 o 3 , 26% Na 2 O·2B 2 o 3 , 1% CsF and 8% NaF. The butt weld of alloy steel rods (40Cr) with a diameter of 2mm is used for flame brazing, which can be directly brazed into shape, without turbulent flow of brazing filler metal, full brazing seam shape, reliable quality, and the connection tensile strength can reach 320MPa.
Embodiment 3
[0037] Such as image 3 As shown, the diameter of the seam welding wire is 1.5mm, which is divided into the outer layer homogeneous alloy solder 1 and the inner core solder 2 structurally, the inner core diameter is 0.9mm, and the weight ratio of the outer layer homogeneous alloy solder is 90%. The weight ratio of the inner core flux is 10%. The composition of the outer homogeneous alloy solder is 61% Cu, 37% Zn, 1.0% Sn, 0.2% Mn, 0.7% Ni and 0.1% Si; the inner core composition is 68% B 2 o 3 , 24% Na 2 O·2B 2 o 3 , 1% CsF and 7% NaF. The butt weld of alloy steel rods (45) with a diameter of 2mm is used for flame brazing, which can be directly brazed to form, without turbulent flow of brazing material, full brazing seam shape, reliable quality, and the connection tensile strength can reach 300MPa.
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