How should gray iron castings be protected during use?

How should gray iron castings be protected during use?

Currently, the cast iron parts produced by the foundry account for a significant proportion of all cast iron products. Cast iron components exhibit excellent vibration resistance, wear resistance, castability, and machinability, making them widely used in various applications. Nantong Hanshi Machinery has been deeply engaged in the casting industry for many years and has also manufactured numerous cast iron parts. So, how should gray iron castings be properly protected during their use?

How should gray iron castings be protected during use?

To prevent deformation of gray cast iron components, the workpieces should be removed from the gray cast iron, gray cast iron plates, and gray cast iron parts, as prolonged pressure on the cast iron plates can cause the workpieces to deform over time.

What is gray iron casting and forging?

1. Gray iron casting: The cast-iron platform is not intended for cleaning the work surface. Instead, apply rust-preventive oil, cover it with rust-proof paper, and then secure the gray iron casting with the platform’s outer packaging to prevent the gray iron casting process from failing—and to avoid damaging the finished product.

2. Gray iron castings are carried out according to the national standard schedule. Depending on the detailed condition, the verification cycle may range from 6 to 12 months.

3. Primarily produces large gray cast iron components, large ball mill leveling parts, large gate valve castings, large pump body castings, chemical tower pressure vessels, and solid conveying machinery. Processing and manufacturing services are welcome.

What are the considerations for structural design in gray iron castings?

The foundry produces a wide range of large castings as well as medium- and small-sized ones. When designing gray iron casting structures, careful distinctions should be made. Nantong Hanshi Machinery specializes in large castings and boasts experienced casting designers. We offer services spanning from blueprint processing to precision machining. When designing gray cast iron structures, the following considerations are typically essential:

1. Thanks to gray cast iron's excellent fluidity, volumetric shrinkage, and linear contraction, foundries can design thin-walled (but not too small to prevent white spots) and complex shapes.

2. Since gray cast iron has tensile strength that is 3 to 4 times higher, to fully leverage the strength characteristics of gray cast iron parts, casting workshops should frequently employ asymmetric surfaces, ensuring that compressive stress in the cross-section of the casting remains low, while load-induced stress on the casting itself is maximized.

3. When designing the structure of gray cast iron, the wall thickness should not be too thin, and edges and corners should be appropriately thickened to prevent the formation of brittle white cast iron structures.

4. The mechanical properties of gray cast iron are highly sensitive to wall thickness. Therefore, foundries should not rely on increasing wall thickness as a method to enhance the load-bearing capacity of castings. The critical thickness for various types of gray cast iron can be selected from Table 1.1-6. Additionally, casting workshops can also achieve the goal of eliminating existing thick sections and improving load-bearing performance by employing rational cross-sectional shapes.

That’s all for the questions we’ve compiled for you about how to protect gray iron castings during use—we hope this helps!