Option 41
1. Describe the types of imperfections in the crystalline structure of real metals.
2. How does the performance of the parts change after blasting
Processing and why?
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 2.7% 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 150 NW.
Specify, as this mode is called, describe the essence of transformation and what structure gets
I´m in this case.
5. Describe the structure and properties of steel 45 and V12 after quenching from a temperature of 760 and 840 °
C (explain using the iron-cementite state diagram). Choose the best one
A mode of heating under hardening of each steel.
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