Option 13
1. What is subcooling and how does it affect the grain size of the crystallizing
Metal?
2. What processes occur when the deformed metal is heated above the temperature
Recrystallization? In this case, the structure and properties change?
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 0.6% C. What is the structure of this
Alloy at room temperature and how such an alloy is called?
4. What is normalization? Using the iron-cementite state diagram, indicate
The temperature of normalization of steel 45 and steel U12. Describe the transformations occurring in steels
With the selected processing mode, the resulting structure and properties.
5. The cutting tool must be machined for maximum hardness. For his
Manufacture is selected steel U13A. Assign a heat treatment mode, describe the structure and
Properties of steel.