Garbuzova KR1 Option 41

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Option 41

• Describe the types of imperfections in the crystalline structure of real metals.
• How does the performance of the parts change after blasting

Processing and why?

• 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?

• 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.

• 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.