Materials kontrolnaya2 / variant13 on Garbuzova

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Uploaded: 15.09.2012
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Given exhaustive answers to questions 13 5 Option 2 control work on material for the training manual Garbuzova NE
1. Set the temperature quenching, cooling medium and tempera¬turu vacation thread gauges of steel U10A. Describe the essence of the transformation, the microstructure and hardness after heat treatment of the tool.
2. As a result of thermal treatment of traction need to get increased strength over the entire section (hardness 250 ... 230 HB). For the manufacture of selected steel 30HM. Specify the composition of the group and determine the steel for its intended purpose. Give and justify the regime of thermal obrabot¬ki explaining the effect of doping on the transformations occurring during heat treatment of the steel. Describe the structure and properties of the steel after heat treatment.
3. For details, working in contact with strong acids, selected steel 12X17. Specify the structure and determine the class began. Obyas¬nite reason for the introduction of chromium in the steel and justify the choice of the sta¬li for these conditions.
4. For the manufacture of some parts used in aircraft alloy ml3. Decipher composition, select a method of manufacturing parts of this alloy and describe mechanical properties.
5. Describe foams varieties and properties. Specify the scope of the foams in mechanical engineering.


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