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400 Rub.
1. Assign a quenching temperature, a cooling medium, a tempering temperature
Files of steel U13. Describe the nature of the transformations that occur, the microstructure and
Hardness of the tool after heat treatment.
2. Steel XI2M was chosen for the manufacture of edging punches. Specify the composition, designate and
Justify the mode of heat treatment, explaining the effect of doping on all transformations,
Occurring during the heat treatment of steel. Describe the microstructure and properties of steel after
Heat treatment.
3. In the boiler industry, steel 12X2MFSR is used. Specify the composition and define the group
Steel by designation. Assign a heat treatment mode and give its justification.
Explain the effect of alloying elements on transformations during the heat treatment of steel.
Describe the effect of temperature on the mechanical properties of steel.
4. For the manufacture of parts by deep drawing, brass L70 is used. Please specify
Composition and describe the structure of the alloy. Assign a mode of intermediate heat treatment,
Applied between the individual drawing operations, justify the selected mode and
General characteristics of the mechanical properties of the alloy.
5. Classification of protective polymer coatings according to their intended use. Primary requirements,
Applied to them, and the field of their application in engineering.
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