Materials Science Control 2 Option 28 by Garbuzov

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Uploaded: 10.04.2013
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Complete answers to 5 questions of 28 variant 2 of the control work on materials science according to the methodology of N. Garbuzova are given.
1. Products made of steel 45 are required to be improved. Assign a mode of heat treatment, describe the essence of the transformations occurring, the structure and properties of steel.
2. Steel XV5 is chosen for the cutting tools. Specify the composition, assign and justify the heat treatment mode, explaining the effect of doping on the transformations occurring during the heat treatment of this steel. Describe the microstructure and properties of the steel after thermal treatment.
3. Assign stainless steel to work in an environment of medium aggressiveness (salt solutions). Give the composition of the steel, the necessary thermal treatment and the resulting structure. Explain the physical nature of the corrosion resistance of the material and the role of each alloy element.
4. For the manufacture of parts by deep drawing, brass L80 is used. Specify the composition and describe the structure of the alloy. Assign the intermediate heat treatment regimen used between the individual drawing operations and justify it.
5. High and low pressure polyethylene. Describe its properties and application in mechanical engineering.

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