According to the existing form of carbon, cast iron can be classified as white iron, gray iron, malleable iron and ductile iron four kinds. Cast iron

Characteristics of carbon and sulfur, high content of phosphorus impurities, inhomogeneity, low plasticity, belonging to the weldability of poor materials. Cast iron welding

The main problems, First, welded joints areas prone to white and hardened tissue, the second is prone to crack.

Types Of Welding Electrode(or welding repair) is broadly divided into the cold welding, semi-hot welding and heat welding of three, consumables selection is divided into homogeneous weld and welding of heterogeneous

Sew two categories. At present, can provide dozens of Cast Iron Electrode, according to the characteristics of cast iron electrode, butt the requirement of additional documents (such as

Whether cutting) material properties of cast iron and weld up the importance of selection.

Asked the gray cast iron butt weld, Z208, Z248 electrode can be used, subject to the weld surface processing, can choose the Z308

, Z408, Z418, Z508 electrode, which Z308 most vulnerable to processing; ductile iron and high-strength cast iron, you can choose the Z258.

Z408, Z418 electrode, it should be noted that, cast iron electrode is the third of material, the seventh of the process, in addition to a reasonable selection of welding consumables, but also

Appropriate process measures must be taken according to job requirements, such as warm-up segment welding, large (small) current instantaneous spot welding, hammering,

And heat in order to achieve satisfactory results.