Option 16
1. How do dislocations affect the mechanical properties of metals?
2. Explain the nature and nature of the change in the properties of the metal under plastic
Deformation.
3. Draw a diagram of the iron-iron carbide state, indicate the structural
Components in all areas of the diagram, describe the transformations and construct a curve
Cooling (using the phase rule) for an alloy containing 1.3% C. What is the structure of this
Alloy at room temperature and how such an alloy is called?
4. Draw a diagram of the isothermal transformation of austenite for steel V8, apply
On it is a curve of the isothermal treatment regime, which provides a hardness of 45 HRC.
Indicate how this regime is called, describe the nature of the transformations and what structure
Is obtained in this case.
5. Using the iron-cementite state diagram, determine the temperature
Normalization, annealing and hardening for steel 30. Describe these thermal regimes
And describe the structure and properties of the steel after each treatment.