Gas fusion welding of cast iron ensures a homogeneous stress free weld with improved metallurgical and machining properties compared to those of the parent metal.
All castings are pre-heated at a controlled rate until the optimum welding temperature is reached. Whilst the entire component is maintained at this temperature, the area to be remanufactured is then subject to the application of intense localised heat bringing it to a fluid state.
The welding operative maintains a molten pool of the base metal into which is fed a carefully selected, own manufactured, cast iron filler material at the same grade.
Controlled cooling from the fluid state to ambient temperature ensures a stress free homogeneous weld deposit.
These examples of welding sections magnified 105 times ilustrate the integrity of the weld interference of spheroidal graphite irons.
Castings are manufactured in several types of material it is important that before any welding is carried out a full material analysis should be established.
Cast Iron Welding Services have proved with classification that the materials have been successfully tested and that certification has been issued for common grades of cast iron.