BASE METAL CHARACTERISTICS & HARDFACING DEPOSIT METHODS
The preferred methods for applying bare hardfacing rod to base metal are the oxyacetylene and the TIG (Gas Tungsten Arc) processes. The oxyacetylene process has a controlled, low dilution rate (0-5%) of the hardfacing alloy by the base metal. The TIG method is an alternative to oxyacetylene when large parts or difficult base metals are involved. It produces clean deposits and allows a high degree of control over heat input, the positioning of the arc and weld deposit.
Provided in the following sections are technical information related to base metal characteristics and hardfacing methods.