Forge weldingmethod is oldest welding process. It has an application of the blacksmith’s method of metals joining.
The metals which to be joint are heated in furnace or some other source of heat to the plastic stage or just bellow the molten stage of metals (looks like very bright). Then heated metals are bring on anvil from heat source and superimposed the both metals where to be joint. Apply the hammering or pressed together until a joint has been created.
The applying of heat must be uniformed. Otherwise the joint is made weak or spongy rough appearance. So heat should not be too high or too little.
To avoidance of oxidation a little amount of flux may be used in weld joint.
Low carbon steel and wrought iron components gives satisfactory weld joints.
There are mainly three types of forge welding method is used -