​Comparison of castings and stainless steel forgings!

Compare the differences between castings and stainless steel forgings:

1. Castings have good wear resistance and shock absorption function. Because the graphite in cast iron is conducive to lubrication and oil storage, the rough parts have good wear resistance. Similarly, due to the presence of graphite, gray cast iron has better shock absorption than steel. .

2. The casting process performance is good. Since gray cast iron has high carbon content and is close to the eutectic composition, it has a relatively low melting point, good fluidity and small shrinkage, so it is suitable for casting complex structures or thin-walled castings. In addition, due to graphite It is easy to form chip breakage during cutting, so the machinability of gray cast iron is better than that of steel.

3. The structural structure and mechanical properties of stainless steel can be improved after forging. After the casting structure is deformed by hot processing by the forging method, due to the deformation and recrystallization of stainless steel, the original coarse dendrites and columnar grains change into an equiaxed recrystallization structure with finer grains and uniform size, causing the original segregation and recrystallization in the steel ingot. The compaction and welding of porosity, pores, slag inclusions, etc. make the structure more compact and improve the plasticity and mechanical properties of the metal.

4. The mechanical properties of castings are lower than those of forgings of the same material. However, the forging process can ensure the continuity of the metal fiber structure, keep the fiber structure of the forging consistent with the shape of the forging, and ensure that the parts have good mechanical properties and long service life. Precision die forging, cold extrusion, warm extrusion and other processes are used. The forgings produced are unmatched by castings.

Whether it is castings or stainless steel forgings, they are an indispensable part of mechanical production. In mechanical production, the corresponding castings or forgings are selected according to the different product properties. Only by giving full play to the role of castings or forgings can we have perfect mechanical products. .

Accessories blank

We are no strangers to castings, and the application of castings has a long history. In ancient times, people used castings to make coins, weapons, tools and some daily utensils. In modern times, however, castings are mainly used as blanks for machine parts or directly as machine parts. Castings begin to account for an increasing proportion of mechanical products, and their usage is increasing year by year. The shapes and varieties of castings are also constantly changing. Castings have gradually become an indispensable part of our daily lives. Castings can be used in various situations such as door handles, door locks, and small water pipes.

Castings have excellent mechanical and physical properties. They can have various comprehensive properties of strength, hardness, and toughness. They can also have one or more special properties, such as wear resistance, high and low temperature resistance, corrosion resistance, etc. .

The weight and size range of castings are very wide, the lightest one only weighs a few grams, the heaviest one can reach 400 tons, the thinnest wall thickness is only 0.5 mm, the thickest can exceed 1 meter, and the length can range from a few millimeters to more than ten meters. It can meet the usage requirements of different industrial sectors.