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.