The essential difference between cast steel bearing seats and cast iron bearing seats is the different chemical composition. If the carbon content is higher than 2%, it is considered iron, and if it is lower, it is steel. It is precisely because of the different composition that the organizational properties are also different. In general, the plasticity and toughness of steel are relatively good, that is, its elongation, cross-sectional shrinkage rate, and impact rate are relatively good. The mechanical properties of iron are mainly hard and relatively brittle. So how do we distinguish between cast iron and cast steel:
1. Brightness: cast steel bearing seats will be shiny, while cast iron will be dark or gray. Gray iron in cast iron is different from ductile iron, and ductile iron is brighter than gray iron;
2. Particles: The density of cast steel is relatively concentrated during casting, so obvious particles cannot be seen on the surface with the naked eye. Gray iron and ductile iron are visible, and the particles of gray iron are larger;
3. Sound: The collision of cast iron bearing seats will make a dull sound, while the collision of cast steel bearing seats will make a crisp sound;
4. Toughness: The toughness of cast steel is better, close to that of steel plate. The toughness of cast iron is worse, and thin-walled parts can reach a bending state of 20-30 degrees, while gray cast iron has no toughness;
5. Gas cutting: The surface of cast steel is rough, and the riser and pouring port have large areas, so gas cutting is required for cleaning. Cast iron cannot be cut by gas cutting;
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