Garbuzova KR1 Option 39

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Option 39
1. Describe the parameters of the crystallization process. Their influence on grain size
Crystallizing metal.
2. What is the essence of the work hardening? Its effect on the operational properties of the metal.
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 a phase rule) for an alloy containing 3.3% C. What is the structure of this
Alloy at room temperature and how such an alloy is called?
4. What is hardening? Using the iron-cementite status diagram, indicate
Temperature of heating for quenching of steel 50 and V12. Describe the transformations occurring in steels
With the selected processing mode, the resulting structure and properties.
5. Products after properly performed quenching and subsequent tempering have
Hardness is lower than specified by the technical conditions. . What caused this defect and
How can I fix it?


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