Garbuzova KR1 Option 04

Product description

Option 4

• Describe the physical nature and mechanism of the crystallization process.
• What is the purpose of recrystallization annealing? How to assign a mode of this kind

Processing? 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 0.4% C. What is the structure of this

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

• Using a diagram of the isothermal transformation of austenite, explain why

It is impossible to obtain a purely martensitic structure in steel when it is cooled at a rate less than

Critical?

• After the heat treatment of carbon steel, a cementite +

Martensite of tempering. Apply to the state diagram the iron-cementite ordinate of the specified steel

(Approximately) and justify the heating temperature of this steel for quenching. Also indicate the temperature

Describe the transformations that occurred during heat treatment.