The cast iron commonly used in engineering includes gray cast iron, ductile cast iron, vermicular cast iron and malleable cast iron.
The following are their performance and characteristics.
1. Gray cast iron
The structure of gray cast iron is composed of graphite and matrix. The factors affecting the structure and performance of gray cast iron are mainly chemical composition and cooling rate.
2. Ductile cast iron
Good casting performance, high tensile strength and high fatigue strength. In actual engineering, ductile cast iron is often used to replace steel to manufacture certain important parts, such as crankshafts, connecting rods and camshafts.
3. Vermicular cast iron
Vermicular cast iron is also called as Compacted graphite iron. It has certain toughness and high wear resistance, casting performance and thermal conductivity. It is mainly used to produce cylinder heads, cylinder liners, ingot molds and hydraulic valves.
4. Malleable cast iron
It has high strength, plasticity and impact toughness, and is often used to manufacture parts with complex shapes and subjected to impact and vibration loads, such as pipe joints and low-pressure valves.
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