How do you weld the brass with the brass
It is primarily through the solder to melt until heated to a definite temperature, thus the two kinds of the same material or different materials of metal together, specific application is as follows: 1, the welding of all kinds of hardware tools, diamond cutting tools, grinding tools, drilling tools, alloy saw blade, carbide turning tool, milling cutter, reamer, cutter, woodworking drill welding; 2 welding, all kinds of hardware machinery spare parts, hardware product that defend bath, the refrigeration copper fittings, lamp fittings, precision mould parts, metal shake handshandle, egg beater, alloy steel and steel, steel and copper, copper and copper equivalent metal or silver welding, brazing of dissimilar metal; 3, composite pot bottom welding is mainly used for round, square and other non-surface stainless steel pot bottom and aluminum plate brazing, which can also be used in other metal flat soldering. The hot pot of electric kettle (electric coffee pot) is mainly used for the brazing welding of stainless steel flat, aluminum and various types of electric heat pipe. Welding of communication products, stable welding points and welding with automatic equipment.
The power supply can be connected directly by dc or by communication. When welding with ac power, the amount of evaporation of zinc is small. The welding parameters are suitable for high welding current and fast welding speed. The welding parameters of the copper plate of 16-20mm copper plate are: 260 ~ 300A of welding current, 5mm diameter of tungsten, 3.5-4.0 mm in diameter, the nozzle aperture 14 ~ 16mm, argon gas flow 20 ~ 25L/min. In order to reduce the evaporation of zinc and operation with filler wire welding can be "sub", on the filler wire arc arc and maintain, as far as possible to avoid arc directly effect the parent metal, parent metal mainly depends on the heat transfer of molten pool of metal to heating melting. When welding, should be as single layer welding as possible, board thick is less than 5mm joint, best can be done at one time.
The method of welding brass in the welding method of brass is welding electrode welding and argon arc welding, and the main points are as follows: (1) the welding electrode is made of green copper core electrode, such as ecusn-b (T227) and ECuAl C (T237). The non-high brass castings can be made with pure copper core electrode, such as ECu (T107). Power source adopts dc is meet, V groove Angle should not be less than 60 ° ~ 70 °. When the plate is more than 14mm thick, the surface of the soldering surface should be carefully cleaned up to remove the oil impurities that produce hydrogen. The operation should be done in short arc welding, the electrode will not be horizontal and forward and backward, only along the line of the weld. Welding speed should not be lower than 0.2 ~ 0.3 m/min. When multi-layer welding, the oxidation film and slag between layer and layer should be cleaned up. A large brass copper liquid liquid, so the best welding pool in a horizontal position, if the welding pool must tilt, should not be greater than 15 ° inclination
The welding of brass Brass is copper zinc alloy, due to the boiling point of zinc is low, only about 907 ℃, thus the welding process is extremely easy to evaporate, this be brass welding of the biggest problems. When under the effect of welding heat, welding rod arc welding, as much as 40% of the zinc evaporation, evaporation of zinc and lead to mechanical properties and corrosion resistant performance of welded joint, and to increase the sensitivity of stress corrosion. Evaporation of zinc in air was immediately into zinc oxide, oxide formation of white smoke, bring great difficulty to the operation, but also affect the welder healthy body, therefore, the welding place of brass, should strengthen the protection measures such as ventilation. The welding of brass is not good, it produces stomata, crack, zinc evaporation and oxidation. In order to solve these problems, often used in the welding wire containing silicon, because can form a layer of silicon in molten pool surface density of silicon oxide film, block zinc evaporation and oxidation, and prevent the invasion of hydrogen. After welding by 470 ~ 560 ℃ annealing treatment, to eliminate stress to prevent the phenomenon of "crack"
