20Cr alloy steel is a low-carbon chromium-molybdenum alloy structural steel, its main components are carbon, chromium, molybdenum and a small amount of manganese, silicon and other elements.
The following is an overview of the knowledge content of 20Cr alloy steel:
1. Chemical composition: The chemical composition of 20Cr alloy steel includes carbon (C), chromium (Cr), molybdenum (Mo) and a small amount of manganese (Mn), silicon (Si) and other elements. Among them, the content of chromium and molybdenum makes the steel have high corrosion resistance, heat resistance and wear resistance.
2. Features: 20Cr alloy steel has good weldability, plasticity and toughness, and also has high strength, hardness and wear resistance. It is commonly used in the manufacture of mechanical parts, bearings, auto parts, forgings, etc.
3. Processing technology: 20Cr alloy steel can be processed by various processing technologies, such as forging, rolling, extrusion and cutting. Among them, for cutting processing, factors such as cutting parameters and coolant need to be considered to ensure processing quality and efficiency.
4. Heat treatment: 20Cr alloy steel can change its structure and properties through heat treatment. After normalizing, higher hardness and wear resistance can be obtained; while quenching can improve the strength and toughness of steel.
5. Standard specification: The standard specification of 20Cr alloy steel includes GB/T 3077-2015 "Technical Conditions of Alloy Structural Steel", GB/T 8162-2018 "Seamless steel tube", etc. These specifications stipulate the requirements and test methods for the chemical composition, mechanical properties, processing technology, quality requirements and other aspects of steel.
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