Hardface Welding is a welding process used to create a metallurgically bonded metal coating that can be used to protect against corrosion, wear and thermal shock. In the actual application process, the welding process should be selected according to the composition or material of the workpiece to provide high-quality maintenance or protection solutions for metal materials. Each of its types of Hardface Welding has its advantages and suitable application materials.
1. Tungsten inert gas (TIG) welding
TIG welding, also known as gas tungsten arc welding, is an arc welding process that uses a non-consumable tungsten electrode to create a weld. It is suitable for processing Stellite Alloy, stainless steel, Colmonoy Alloy, carbon steel and other wire rods.
2. Metal inert gas (MIG) welding
MIG welding, sometimes called gas metal arc welding, is a welding process in which an electric arc is formed between a consumable MIG wire electrode and the workpiece metal. This high temperature causes the two to melt and bond together. Its process mainly uses MIG welding and flux core welding to repair severely worn, corroded or cracked sections of steel or stainless steel.
3. Plasma transfer arc (PTA welding)
This process mainly uses alloy powder to be welded to the surface of the material to improve its wear resistance, and to repair and overhaul worn parts. It is an environmentally friendly alternative to laser cladding. The PTA welding process is mainly used for impact tool repair, valve stem and seat repair and pump component repair, etc. The applicable materials are tungsten carbide, cobalt-based alloy and stainless steel.
4. Brazing
Brazing is a metal joining technique that joins components by heating the base material and flowing a filler material across the joint. Brazing differs from welding because it does not involve melting the workpiece. It can be used to join two pieces of material made of dissimilar metals, or to join metals that are not easily weldable. Filler metals can be customized based on connection type or component application. Brazing is often used on cast iron components to repair broken or corroded sections. It is great for repairing scuffs on equipment casings.
