【Cast Iron Weights Precautions】
1) Due to the good fluidity of cast iron, with minimal shrinkage and line shrinkage, thin-walled and complex-shaped castings can be planned.
2) The mechanical properties of cast iron are highly sensitive to wall thickness, hence it is not advisable to increase the load-bearing capacity of castings by simply adding wall thickness. Instead, the objective of both eliminating thick sections and improving load-bearing capacity can be achieved by manipulating the shape of the cross-section.
3) Due to the higher compressive strength of gray iron compared to tensile strength by a factor of 3-4, to fully utilize the unique characteristics of gray cast iron, it is advisable to commonly use asymmetric cross-sections, making the section subjected to compressive stress smaller than the section subjected to tensile stress.
4) When planning cast iron structural castings, the wall thickness should not be too thin, and the corners should be appropriately thickened to prevent white mouth arrangements that make the area hard and brittle, difficult to machine.
5) Cast iron has almost no plasticity, so it cannot be corrected like cast steel after deformation. Therefore, when planning gray cast iron structures, it is advisable to follow the principle of simultaneous solidification and choose symmetrical structures. Design the structural shapes and wall thicknesses to be freely shortened to prevent deformation cracks in the castings.
