Welding Cast Iron Gears. Cast iron welding rods are available in two main types. In most cases welding on cast iron involves repairs to castings not joining casting to other members.
Newbies and intermediate welders need both workpieces heated while pros can manage a quality weld without any heat treatment. A low amperage is needed to avoid deep fusion between the base material and filler. Trusted China Suppliers Verified by SGS.
The cold in cast iron cold welding refers to the low heat needed to the base metal.
Can cast iron be welded. The reason why deep fusion is avoided is to keep graphite and the resulting iron carbide away from the weld pool. Its a good option to minimize the extreme heating and cooling of the electric welding processes and its easier to maintain the temperatures of the components with it. The welding method is TIG GTAW and the welder of choice is an air-cooled machine such as a Miller or HTP.