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Thick metal plate large-area butt joint braze welding method

A brazing method and metal plate technology, applied in metal processing, metal processing equipment, welding equipment, etc., can solve the problems of poor solder filling, difficult gas discharge, low brazing rate, etc., and achieve high brazing rate and heating time. Short, uniform heating effect

Active Publication Date: 2014-08-27
ZHENJIANG SIYANG SPECIAL METAL MATERIAL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a butt joint resistance brazing method of thick metal plates, which changes the large-area butt joint of two metal plates and adopts manual flame brazing, and solves the problem that solder is easy to appear when resistance brazing is used for large-area butt welding of thick metal plates The problems of poor filling, difficult gas discharge, many defects, and low brazing rate make the brazing layer have good brazing rate, bonding strength and electrical properties

Method used

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  • Thick metal plate large-area butt joint braze welding method
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  • Thick metal plate large-area butt joint braze welding method

Examples

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Effect test

Embodiment 1

[0022] The two thick metal plates 1 are made of T2 copper, and the selected foil-shaped brazing material 3 and the preset brazing material 4 in the U-shaped groove 2 are BAg45CuZn, and the brazing joint surface of the two T2 copper plates 1 is a U-shaped surface. to combine figure 1 and image 3 Note that the method described in this embodiment is implemented by the following steps.

[0023] In the first step, the thickness of the two pieces of T2 copper plate 1 is processed to 38mm. The width of the T2 copper plate with a U-shaped surface is 140mm, and the width of the T2 copper plate inserted into the U-shaped groove is 99.7mm. The welding surface and the upper surface of the two pieces of copper plate 1 A U-shaped groove 2 with a width of 4 mm and a height of 3 mm is processed at the joint.

[0024] The second step is to place 0.15mm thick foil-like BAg45CuZn brazing material 3 in the gap between the 1U-shaped contact surfaces of the two T2 copper plates, and use a clamp ...

Embodiment 2

[0029] One of the two thick metal plates 1 is made of H65 brass, and the other is made of 1Cr18Ni9Ti stainless steel plate. The selected foil-shaped brazing material 3 and the preset brazing material 4 in the U-shaped groove 2 are BAg45CuZn, H65 brass The brazing joint surface of plate 1 and 1Cr18Ni9Ti stainless steel plate 1 is plane, and the joint figure 1 and figure 2 Note that the method described in this embodiment is implemented by the following steps.

[0030] The first step is to process the thickness of H65 brass plate 1 and 1Cr18Ni9Ti stainless steel plate 1 to 23mm and the width to 100mm, and process a width of 3mm and a height of 3mm at the connection between the welding surface of H65 brass plate 1 and 1Cr18Ni9Ti stainless steel plate 1 and the upper surface The U-shaped groove 2.

[0031] The second step is to place a 0.1mm thick foil-shaped BAg45CuZn brazing material 3 in the gap between the butt joint contact surfaces of the H65 brass plate 1 and the 1Cr18Ni...

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Abstract

A thick metal plate large-area butt joint braze welding method is implemented through the following the steps that the connecting portions of a braze welding surface of a metal plate and an upper surface of a metal plate are respectively provided with a rectangular notch through machining, and thus a U-shaped groove is formed when the two metal plates are in butt joint; foil type braze welding flux is arranged between the braze welding surfaces of the two metal plates, the two metal plates and the foil type braze welding flux are tightly combined through a clamp, and the braze welding flux is arranged in the U-shaped groove in advance; the welding seam of the two clamped metal plates is arranged between an upper electrode plate and a lower electrode plate of a resistance welding machine, contact electrodes cover the whole braze welding seam, and the braze welding seam is perpendicular to the contact surface of the contact electrodes; the upper electrode plate and the lower electrode plate of the resistance welding machine are pressurized, the foil type braze welding flux and the braze welding flux arranged in the U-shaped groove in advance are melted through electric heating so as to fill the welding seam, and heating is stopped while pressure is maintained until the welding part is cooled. According to the thick metal plate large-area butt joint braze welding method, the manual flame braze welding mode adopted in the large-area butt joint of the two metal plates is changed, the problems that braze welding flux filling is poor, gas is difficult to discharge, many defects are generated and the brazed rate is low due to the fact that resistance braze welding is adopted in thick metal plate large-area butt joint welding are solved, and a brazed layer is made to have the good brazed rate, good bonding strength and good electrical properties.

Description

technical field [0001] The invention relates to an intermetallic brazing method, in particular to a brazing method suitable for large-area intermetallic welding. Background technique [0002] At present, the large-area butt brazing of two metal plates generally adopts the method of manual flame brazing, but the brazing time is long, the existence efficiency is low, the labor intensity is high, and the brazing rate is low when welding thicker metal plates. Generally, high-power resistance brazing has fast heating speed and high efficiency, and the weld seam is evenly heated. If resistance brazing is used for butt welding of two thicker metal plates, the electrode plate is perpendicular to the brazing seam and close to the brazing seam. When the prefabricated foil-shaped solder is insufficient or partly flows out, it is easy to cause a low brazing rate, and it is not easy to discharge the resistance brazing gas with a large butt joint area, and there are many defects such as p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/20
CPCB23K1/0004B23K1/20B23K2101/185
Inventor 孙爱俊李学浩迟永强卞金强杨名王炜
Owner ZHENJIANG SIYANG SPECIAL METAL MATERIAL MFG
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