Brazing and Plating
BRAZE WELDING
Braze welding is a welding process carried out by melting only the filler metal, while the base metal is locally heated to a temperature below its melting point, suitable for joining with the filler metal.
The filler metal must always have a lower melting temperature than that of the base metal and the joint is therefore heterogeneous: if the base metal is brought to a convenient temperature (called wetting temperature), braze welding ensures the establishment of a special bond between the two metals, capable of realizing in the welded joint mechanical properties of the same order and often even higher than those of the base metal.
The filler metals generally used on steels, cast irons and copper and its alloys are alloys of copper, zinc and silicon or copper, zinc, nickel and silicon.
Main features in braze welding
Braze welding is a welding process that should be used when:
- you want to weld two metals of different natures together
- dubious metals are to be welded
- deformations on the metals to be joined should be reduced or limited
- little finishing is required to the joined piece
- low-melting material is required without changing the geometry of the caulking on the base metal (e.g., carryover of nonmagnetic material on magnetic materials)
PLACING
Welding surfacing, also called cladding, is an operation by which hard material (welding surfacing, in fact) is contributed to worn parts or parts intended for wear. Plating can be done by MIG/MAG and TIG processes with filler material.
Tecno-Welding is equipped for welding coatings, sheet metal plating, welded coatings, and refilled sheets, starting from small shafts up to performing welding coatings on parts with hardness specifications and dimensions required by the customer.
Main properties enabled by the execution of weld coatings
- Anti-wear, anti-corrosion, anti-scratch treatment
- Increase or decrease in electrical, thermal and magnetic conductivity
- Restoration of worn parts and organs
- Decorative interventions
- Increased grip
