Manual arc welding, repair welding cast iron piece with the Welding Rod. According to weld 928 points, there are mainly five types of electrode:

(1) pure nickel class Cast Iron Electrode. Electrode made ??of pure nickel weld core and graphite-type coating, weld nickel-containing more than 90%, mainly for difficult welding Welding malleable cast iron and alloy cast iron.

(2) nickel-iron type Cast Iron Electrode: the electrode made ??by the core of nickel-iron welding and graphite type coating, containing nickel in the weld in about 50% of soil to be used for repair welding of ductile iron.

(3) of nickel and copper in class cast iron electrode. Nickel-containing welding nickel-copper alloy (monel) core and the electrode made ??of graphite-type drug skin, the weld 60% to 70%, copper 25% and 35% for repair welding of gray cast iron.

(4) cast iron cast iron electrode. Cast iron welding core electrode made ??of carbon steel welded core and graphite type coating, weld composition of cast iron composition is close to gray cast iron and nodular cast iron welding repair welding should preheat to 400 ~ 500 ℃ , slow cooling after welding insulation.

(5) carbon steel cast iron electrode.

There are two of its weld composition. One is close to the low-carbon steel, the other is the weld composition containing vanadium in about ll%. The former welding repair can not be cutting; the latter Welding, cutting, its crack resistance than the former. Can weld up the general iron castings and ductile iron casting