Materials kontrolnaya2 / variant26 on Garbuzova

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Given exhaustive answers to 4 questions 26 version 2 control work on material for the training manual Garbuzova NE

1. Set the mode of heat treatment of lightly loaded parts of a hundred-li 45. Provide justification and describe the structure and mechanical properties of the parts. Explain why satisfactory properties on the products of the steel can be prepared in smaller sections?

2. For the manufacture of parts of dies, metal machining cold, steel HG3SV selected. Specify the structure, assign and justify the regime of heat treatment of steel, explaining the effect of doping on the transformation during heat treatment. Describe the microstructure and properties after heat treatment of dies.

3. For the rheostat resistance elements selected alloy manganin MNMts3-12. Decipher composition, describe the structure and electrical characteristics of this alloy.

4. piston internal combustion engine operating at temperatures of 200-250 ° C Alloy used AL1. Decipher the composition and the method for manufacturing parts of this alloy. Describe the mode of hardening heat treatment and briefly explain the nature of hardening.