VR Foundries is one of the leading ductile iron casting manufacturers in Coimbatore. We achieved this by sticking to certain procedures for the manufacturing of Ductile Iron. This blog will cover some of the procedures that we follow in the manufacture of ductile iron castings.
When subjected to heat, the ductility of ductile iron can be increased higher. The heating techniques of ductile iron can result in an increase in toughness, strength, ductility, water resistance, corrosion resistance, consistency of properties and reduced internal pressure.
The abrasive resistance and surface hardening can be increased by hardening treatment. This is a key characteristic of any ductile casting that is to quench-hardened as it decides the depth to which a fully or partially ductile iron casting can be made and the harshness of quench needed for the hardening of castings of various section sizes.
The difference in designs:
With the shrinking of ductile iron, the ductile iron foundry has to supply more metal into the shrinking zone. We generally design a part whose proportions increase gradually in a consistent way toward a location where the metal is fed through a riser sleeve. Here alignment of cross members would result in even cooling leading to distortion, hot spots and weakness. We follow the recommended practise which is to stagger cross member intersection.
Ribbing should be eliminated on either side of casting as this would lead to hot spots. They should be about 80 percent as thick as the section they attached, and this means the rib would solidify prior to that of the casting section. The shape of the rib should be followed by consistent cooling.