Matters needing attention in choosing ductile iron manhole cover mold

Matters needing attention in choosing ductile iron manhole cover mold

Nodular cast iron is spheroidized to obtain spherical graphite, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining a strength higher than that of carbon steel. Ductile iron manhole covers have high strength, high compression, bending and impact resistance. Its load-bearing capacity is strong, surpassing various traditional products, and it can withstand greater pressure without damage, vehicle falling and other accidents.

Pay attention to the selection of ductile iron manhole cover mold manufacturing materials: manhole cover molds with large parts output and stable overall dimensions should use high-performance materials, and this mold material can also be subjected to low-vacuum surface strengthening treatment. The mold shape of the ductile iron manhole cover is complex, the precision is high, and the manufacturing cycle is long. The processing cost of the mold far exceeds the material cost of the mold. This kind of mold should also be a high-performance material.

The high-stress ductile iron manhole cover mold is made of high-performance materials, and its durability can be improved through cheap surface strengthening technology. Molds with small output of parts, molds with simple shape, low stress and easy manufacture, and molds with frequent deformation can be made of ordinary steel, cast iron or even non-metal.