FW6102 direct welding of cast iron surface, the second floor above the surfacing layer hardness: ≤ 35HRC large cast iron rolling die, and other cast iron molding mold repair welding or surface welding. Surfacing of cast iron sometimes used for other pre-transition layer surfacing wear-resistant materials. Commonly used in gray iron, ductile iron, alloy cast iron welding or surface welding defects.