Esab Duroid 650 Hardfacing Welding Electrode 3.15x450 mm

Hard facing is an arc welding process that deposits a hard, wear-resistant coating onto the surface of a metal substrate. It is an alternative to other methods of surface hardening such as flame or induction hardening. Hard facing can be done manually by first preparing the work piece, then using a tungsten electrode to transfer current into the work piece while simultaneously moving it over the tungsten electrode in an arc welding motion. An alternative method is to use an electrical resistance welder which melts a consumable electrode tip that transfers heat into the metal being welded. The heat causes its metal particles to melt and fuse together, creating a stronger bond between the two pieces than before. Hard facing is used on machine parts such as gears, engine valves and crankshafts that are subject to heavy wear but cannot be removed from service for repairs. It can also be used on other parts such as piston faces and cylinder heads. Hard facing is a method of protecting the surface of a metal by fusion-welding a hard material to the surface. Hard facing is used to protect tools and dies in metalworking, wear surfaces such as piston rings, and other applications where abrasion resistance and hardness are required. Hard facing can be done using consumable inserts or by plasma spraying a deposit on the tool's surface.