Hardfacing is a welding process used to apply a layer of wear-resistant material over a metal surface to increase its abrasion and corrosion resistance. One of the most common methods of hardfacing involves using a nickel-molybdenum or nickel-copper alloy, and is referred to as a high nickel-molybdenum hardfacing process. The nickel-molybdenum alloy is welded to the metal surface using a tungsten inert gas (TIG) welding technique.
The nickel and molybdenum in the alloy are added to improve the wear and corrosion resistance of the metal surface. Molybdenum is added for its ability to increase the hardness of the metal surface and to provide improved toughness. Nickel is added for its high oxidation resistance and ability to resist corrosion. The nickel-molybdenum alloy is applied through a high temperature, high amperage arc welding process, which results in a hard, smooth surface.
This hardfacing process provides excellent abrasion and corrosion resistance to the metal surface. It can also be used to repair metal surfaces that have worn over time. After the process is complete, the metal will be more resistant to wear and damage. Additionally, the nickel-molybdenum alloy can also provide a protective coating that prevents the metal surface from further corrosion.
The process is most commonly used on components that are subjected to high levels of friction or contact. It is often used in industrial applications such as the manufacturing of parts for pumps, valves, and other machinery. Additionally, it can be used to improve the wear and performance of components used in planes, trains, and automobiles. It can also be used to seal and repair cracks, chips, and other minor damage to metal surfaces.
Another benefit of this hardfacing process is that it provides an extremely durable and cost-effective solution for hardening and protecting metal surfaces. The hardfacing process uses a TIG welding technique that does not require a separate preheating step and results in an extremely hard and durable surface. The welding process is quick and produces a consistent finish, with few signs of repair.
Overall, the high nickel-molybdenum hardfacing process is an efficient and cost-effective way to increase the wear and corrosion resistance of metal surfaces. It can be used in a variety of industrial applications, including components in pumps, valves, and other machinery. Additionally, it provides a durable and consistent finish, which is resistant to wear and corrosion. The process is also quick and easy to complete, with minimal post-welding work needed.
