1. Annealing: The steel can be annealed at a temperature of 820-850°C, followed by slow cooling in the furnace. This process helps to soften the material and improve its machinability.
2. Normalizing: Normalizing is performed by heating the steel to a temperature of 850-880°C and then air cooling. This process refines the grain structure and improves the mechanical properties of the steel.
3. Quenching and tempering: Quenching is done by heating the steel to a temperature of 850-880°C and then rapidly cooling it in oil or water. This process results in a hardened steel with high strength and hardness. Tempering is then performed by reheating the hardened steel to a temperature of 200-250°C, followed by air cooling. This helps to reduce the brittleness and improve the toughness of the steel.
The mechanical properties of 36Mn5 steel grade after heat treatment include a high tensile strength, good wear resistance, and excellent machinability. It is commonly used in manufacturing components such as gears, shafts, and other mechanical parts.
In terms of technical properties, the steel grade 36Mn5 has a density of 7.85 g/cm3, a specific heat capacity of 477 J/kg·K, and a thermal conductivity of 52.9 W/m·K.
The chemical composition of 36Mn5 steel grade typically includes high levels of carbon (0.32-0.39%), manganese (1.4-1.8%), and trace amounts of other alloying elements such as silicon, phosphorus, and sulfur. These elements contribute to the steel’s strength, hardness, and machinability after heat treatment.
In summary, the heat treatment of 36Mn5 steel grade is crucial for achieving the desired mechanical properties and technical properties required for various applications in the manufacturing industry. By carefully controlling the annealing, normalizing, quenching, and tempering processes, it is possible to optimize the performance of this steel grade for specific engineering requirements.
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