Flux-cored brazing rod with protective film and preparation method thereof
A technology of protective film and flux core, which is applied in welding equipment, manufacturing tools, welding medium, etc., can solve problems such as air hole defects of brazing joints, easy failure of flux core flux, slag inclusion in brazing joints, etc., and save storage costs , avoid moisture absorption, improve the effect of quality
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[0015] Example 1
[0016] Preparation of BAg45CuZn flux-cored brazing rod with protective film:
[0017] 1) Use 20% Na as the flux 2 B 4 O 7 +30% of B 2 O 3 +50% of KBF 4 Formulated
[0018] 2) The BAg45CuZn strip with a thickness of 0.25mm is made into a seam flux-cored brazing rod with a diameter of 2.0mm and a length of 450mm through multiple rolling, powder feeding, drawing, and straightening processes;
[0019] 3) Mix the flux powder ground to a particle size of less than 120 mesh with the molten EVA adhesive curing agent in a ratio of 1:3, immerse the flux-cored brazing rod prepared in step 2) into the mixture, take it out at a uniform speed, and cool After curing, the finished product of BAg45CuZn flux-cored brazing electrode with protective film is obtained, and the thickness of the protective film is about 0.10mm.
[0020] The prepared flux-cored brazing rod with protective film and ordinary flux-cored brazing rod without protective film are placed in the atmosphere for a wee...
Example Embodiment
[0021] Example 2
[0022] Preparation of BAg30CuZn flux-cored brazing electrode with protective film:
[0023] 1) Use 20% Na as the flux 2 B 4 O 7 +35% of B 2 O 3 +45% of KBF 4 Formulated
[0024] 2) The BAg30CuZn strip with a thickness of 0.25mm is made into a seam flux-cored brazing electrode with a diameter of 2.0mm and a length of 450mm through multiple rolling, powder feeding, drawing, straightening and other processes;
[0025] 3) Mix the flux powder ground to a particle size of less than 120 mesh with the molten EVA adhesive curing agent at a ratio of 1:2, immerse the flux-cored brazing rod prepared in step 2) into the mixture, take it out at a uniform speed, and cool After curing, the finished product of BAg30CuZn flux-cored brazing rod with protective film is obtained, and the thickness of the protective film is about 0.12mm.
[0026] The prepared flux-cored brazing rod with protective film and ordinary flux-cored brazing rod without protective film are placed in the atmosphe...
Example Embodiment
[0027] Example 3
[0028] Preparation of BCu62Zn flux-cored brazing electrode with protective film:
[0029] 1) Use 50% Na as the flux 2 B 4 O 7 +40% of B 2 O 3 +10% of KBF 4 Formulated
[0030] 2) The BCu62Zn strip with a thickness of 0.25mm is made into a seam flux-cored brazing rod with a diameter of 2.0mm and a length of 450mm through multiple rolling, powder feeding, drawing, and straightening processes;
[0031] 3) Mix the flux powder ground to a particle size of less than 120 mesh with the molten EVA adhesive curing agent in a ratio of 1:1, immerse the flux-cored brazing rod prepared in step 2) into the mixture, take it out at a uniform speed, and cool After curing, the finished product of BCu62Zn flux-cored brazing electrode with protective film is obtained, and the thickness of the protective film is about 0.13mm.
[0032] The prepared flux-cored brazing rod with protective film and ordinary flux-cored brazing rod without protective film are placed in the atmosphere for a we...
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