If the composition of a filler Welding Electrodesand parent metal, filler metal and base metal in the solid and liquid are not physical chemical reaction, they
Between the wetting is poor, such as lead and iron. Solder and parent Caineng dissolved or form chemical compounds, brazing capacity
Better wetting of the base metal, such as silver, copper. Brazing temperature brazing heating temperature due to the brazing surface tension decreased to improve the brazing on the mother
Wettability of the material, but the brazing temperature is not too high, otherwise it will cause the loss of Welding Consumables, grain growth defects. (3) the base metal surface oxides. If the surface of the base metal oxides, liquid filler metal tends to condense into spherical
, Does not occur with the base metal wetting, therefore, must be fully cleared before brazing oxide in order to ensure good wetting.
Parent material, surface roughness, when the role of weak solder and base metal, base metal surface roughness grooves played a special
Capillary action can improve the wetting and spreading of the brazing material in the base metal.
Seam Welding Electrodes is a circular wheel, wheel diameter 50-600 mm and a common diameter of 180-250 mm. Wheel thickness of 10-20 mm, the contact surface shape of a cylindrical surface and two circular surface, conical surface in the individual case. Cylindrical surface rollers are widely used for welding of steel and high temperature alloy wheel of the circular surface is easy to heat indentation excessive uniform, commonly used in light alloy welding. The roll plate commonly used external cooling. Welding the general steel welding non-ferrous metals and stainless steel, with clean tap water can, to prevent rust, commonly used in aqueous solution containing 5% borax cooling. The roll plate is sometimes internal circulating water cooling, especially Aluminum Electrodewelder, but its structure is much more complex.