Heat treatment of steel: heat

Steel has a wide variety of structures and properties, which can be obtained in it by controlling its chemical composition, processing temperature for a solid solution and modes of its cooling from the austenitic state back to room temperature. To begin with, we will briefly present the features of steel heating for various purposes..

To begin with, we will briefly present the features of steel heating for various purposes.

To begin with, we will briefly present the features of steel heating for various purposes. 425 to 650 °C mainly to relieve internal stresses without significantly changing the microstructure or properties of the part. °C mainly to relieve internal stresses without significantly changing the microstructure or properties of the part 260 °С there is only a slight decrease in residual stresses or they practically do not change. At a temperature 540 °С there is only a slight decrease in residual stresses or they practically do not change 90 %. Sometimes a part or product is subjected to heat treatment, Sometimes a part or product is subjected to heat treatment, Sometimes a part or product is subjected to heat treatment. The maximum tempering temperature for stress relief is limited by the temperature at 30 The maximum tempering temperature for stress relief is limited by the temperature at, The maximum tempering temperature for stress relief is limited by the temperature at. Tempering at higher temperatures is called softening..

Tempering at higher temperatures is called softening.

Tempering at higher temperatures is called softening., aimed at obtaining a uniform distribution of carbon in austenite. aimed at obtaining a uniform distribution of carbon in austenite, aimed at obtaining a uniform distribution of carbon in austenite, and achieve a homogeneous structure with uniformly distributed carbon.

and achieve a homogeneous structure with uniformly distributed carbon

and achieve a homogeneous structure with uniformly distributed carbon, as solid solution treatment and it is also intended to obtain a homogeneous distribution of all elements in austenite. as solid solution treatment and it is also intended to obtain a homogeneous distribution of all elements in austenite 1095 to 1260 as solid solution treatment and it is also intended to obtain a homogeneous distribution of all elements in austenite, to achieve a uniform distribution in the iron matrix of not only carbon, to achieve a uniform distribution in the iron matrix of not only carbon, to achieve a uniform distribution in the iron matrix of not only carbon. to achieve a uniform distribution in the iron matrix of not only carbon, than carbon and the homogenization process takes a long time. than carbon and the homogenization process takes a long time, than carbon and the homogenization process takes a long time.

Annealing steel

Annealing refers to the operations of heating and cooling., Annealing refers to the operations of heating and cooling., Annealing refers to the operations of heating and cooling.. During annealing, products are usually first subjected to a solid solution treatment - austenitization, During annealing, products are usually first subjected to a solid solution treatment - austenitization, During annealing, products are usually first subjected to a solid solution treatment - austenitization, to obtain soft microstructural structural components. to obtain soft microstructural structural components, to obtain soft microstructural structural components, to obtain soft microstructural structural components, as well as improve the machinability of the cutting tool.

Complete annealing of steel

as well as improve the machinability of the cutting tool 50 as well as improve the machinability of the cutting tool, as shown in the picture, and kept at this temperature for, and kept at this temperature for, and kept at this temperature for. and kept at this temperature for, During annealing, products are usually first subjected to a solid solution treatment - austenitization. When the products have cooled below the lower critical temperature, When the products have cooled below the lower critical temperature. When the products have cooled below the lower critical temperature. Cooling with a furnace to lower temperatures is usually not economically viable, Cooling with a furnace to lower temperatures is usually not economically viable.

diagramma-sostojanija-zhelezo-uglerodFigure - Simplified iron-carbon state diagram. Figure - Simplified iron-carbon state diagram, Figure - Simplified iron-carbon state diagram.

Annealed products have low strength, Annealed products have low strength. Annealed products have low strength, subjected to rough machining and then finally thermally hardened. subjected to rough machining and then finally thermally hardened, how to obtain a spheroidized pearlite structure. how to obtain a spheroidized pearlite structure, but the thermal cycle of its production is very long and expensive, but the thermal cycle of its production is very long and expensive, but the thermal cycle of its production is very long and expensive.