Materials kontrolnaya2 / variant27 on Garbuzova

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Uploaded: 10.04.2013
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Given exhaustive answers to questions 27 5 Option 2 control work on material for the training manual Garbuzova NE
1. Set the temperature quenching, cooling medium, the tempering temperature of files from steel Y13. Describe the essence of the transformation, the microstructure and hardness after heat treatment of the tool.
2. For the production of trimming dies selected steel X12M. Specify the structure, assign and justify the regime of heat treatment of steel, explaining the effect of doping on all the transformations occurring during heat treatment. Describe the microstructure and properties of the steel after heat treatment.
3. The power system uses steel 12H2MFSR. Specify the composition of the group and determine the steel for its intended purpose. Assign the mode of heat treatment and provide justification. Explain the effect of alloying elements on the transformation during heat treatment of steel. Describe the effect of temperature on mechanical properties of steel.
4. For the production of parts by deep-drawing of brass L70. Specify the composition and describe the structure of the alloy. Assign mode intermediate heat treatment applied to particular operations hoods, justify the selected mode and provide a general characterization of the mechanical properties of the alloy.
5. Classification of polymer protective coatings for other purposes. The main requirements to them, and their field of application in industry.

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