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Materials Science control 1 option 9 by Garbuzov
Uploaded: 22.07.2019
Content: Вариант 9.rar 94,98 kB
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There are given exhaustive answers to 5 questions of option No. 9 of the control work No. 1 on materials science on the manual of Garbuzova N.Е.
1. Describe the features of the metallic type of bond and the basic properties of metals.
2. What are the standard characteristics of mechanical properties of the strength of metals and alloys? How are these characteristics defined?
3. Draw a state diagram of iron - iron carbide, indicate structural components in all areas of the diagram, describe the transformations and construct a cooling curve (using the phase rule) for an alloy containing 4.8% C. What is the structure of this alloy at room temperature and how is such an alloy called?
4. Using the iron-cementite state diagram, set the temperature for complete and incomplete annealing and normalization for steel 20. Characterize these heat treatment regimes and describe the structure and properties of steel.
5. Why is steel with the initial structure of granular perlite used for making tools? As a result of what heat treatment can this structure be obtained? Give a specific mode for any tool steel.
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