【Cast Iron Weights Precautions】
1) Due to the high fluidity of cast iron, with minimal shrinkage and linear shrinkage, thin-walled and complex-shaped castings can be planned.
2) The mechanical properties of cast iron are highly sensitive to wall thickness, thus it is not advisable to increase the load-bearing capacity of castings by adding wall thickness. Instead, the objective of both eliminating thick sections and enhancing load-bearing capacity can be achieved by altering 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 white mouth formation, which makes the area hard and brittle and difficult to machine.
5) Cast iron has very little plasticity, so it cannot be corrected like cast steel when deformed. Therefore, when planning gray cast iron structures, it is advisable to follow the principle of simultaneous solidification and choose symmetrical structures. Design the structure with free shrinkage and wall thickness to prevent 1) casting deformation cracks.
