The word “ductile” means flexible without losing its characteristics. Hence, ductile iron is predominantly used to the machine and produce the required shapes and structures of iron without losing its strength and toughness. Its unique micro-granular structure makes it gain flexibility and strength.
Here are the brief properties of ductile iron produced via continuous casting.
- Homogenous Structure
The close and unique granular matrix of ductile Iron gives excellent machinability, and better wear resistance to withstand pneumatic or hydraulic pressures.
- Strength and Ductility
Spheroidal graphite (SG)/Nodular iron is comparable to most low alloy/free cutting steels in this regard.
- Reduced Defects
Comparatively, ductile iron produces lesser defects than other production methods/materials.
- Thermal conductivity
This iron is recommended for applications in which heat dissipation is the priority since graphite is an excellent heat conductor.
- Lower residual stress
At this point, the bar exits the die and cooling system, the core of Continuous cast SG Iron bars remains a liquid while the periphery a solid. Hence, the bar is heat treated from inside to outside. This process ensures the release of majority stresses in the SG Iron bars.
- Improved dimensional stability
Continuous cast SG Iron bars have high dimensional stability and strength due to the low residual stresses during the slow unrestricted cooling, and the subsequent annealing process. Hence, this kind of iron makes it ideal for applications where machining is required and is subject to high pressure.
- Excellent bearing properties
Its graphite structure allows excellent dampening of both noise and vibration in flake and modular.
- Improved Corrosion Resistance
It offers high resistance to corrosion, and it is found to be better than steel and as good in many cases as non-ferrous materials.
- Improved wear resistance
Wear resistance is improved due to its self-lubricating network of graphite.
- High Fatigue strength
The cohesion of the structure compared to sand cast and absence of defects make it suitable for applications in which extended fatigue strength is required.