Garbuzova NE Solution KR1 Variant 01 Material Science

Product description

The decision of the control work No. 1 on materials science from the methodology of Garbuzova N.E.

Variant 01

Tasks:

• What is segregation? Types of segregation, the causes of their occurrence and methods of elimination.

• Give the definition of impact strength (KCV). Describe the methodology for measuring this

characteristics of mechanical properties of metal.

• 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 a phase rule) for an alloy containing 3.6% 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 45 ... 50

HRC. Indicate how this regime is called, describe the nature of the transformations and what structure

is obtained in this case.

• How does the structure and properties of steel 40 and V12 change as a result of quenching from

temperatures of 750 and 850 ° C. Explain with the use of the iron-cementite state diagram.

Choose the optimum heating mode for hardening each steel.