Garbuzova KR1 Option 21

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Option 21

• What are the characteristic properties of metals and how are they determined?
• How is the temperature of the metal and alloy recrystallization threshold set?

Give some specific examples.

• 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 0.3% C. What is the structure of this

Alloy at room temperature and how such an alloy is called?

• After quenching of carbon steel, a martensite + cementite structure was obtained.

Put on the state diagram iron-cementite ordinate (roughly) of the processed steel,

Indicate the temperature of its heating for quenching. Describe the transformations that have occurred

With heating and cooling of steel.

• Products made of steel 45 are required to be improved. Assign a thermal mode

Processing, describe the nature of the transformations that occur, the structure and properties of steel after

Processing.