【Cast Iron Weights Precautions】
1) Due to the good fluidity of cast iron, with minimal shrinkage and linear shrinkage, it is possible to design thin-walled, complex-shaped castings.
2) Cast iron's sensitivity to wall thickness and its distinct mechanical properties make it unsuitable to increase the load-bearing capacity of castings by merely adding wall thickness. Instead, the objective of both eliminating thick sections and enhancing load-bearing capacity can be achieved through the shape of the cross-section.
3) Due to the higher compressive strength of gray cast 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 the formation of white mouth, making the area hard and brittle, difficult to machine.
5) Cast iron has very little plasticity, so once it deforms, it cannot be corrected as easily as cast steel components. Therefore, when planning gray cast iron structures, it is advisable to follow the principle of simultaneous solidification and use symmetrical structures. Design the structural sections and wall thicknesses to be freely shrinkable to prevent 1) deformation cracks in castings.
