Given exhaustive answers to questions 21 5 Option 2 control work on material for the training manual Garbuzova NE
1. Set the temperature quenching, cooling medium and tempera¬turu holiday chisels steel U8. Describe the structure and hardness instru¬menta after heat treatment.
2. As a result of the half-line heat treatment should receive increased strength over the entire section (hardness 230 ... 280 HB). For the manufacture of steel chosen 40HNR. Specify the composition of the group and determine the steel for its intended purpose. Assign the mode of heat treatment, provide justification explaining the effect of doping on prevra¬scheniya occurring during heat treatment of the steel. Describe the structure and properties of the steel after heat treatment.
3. Some parts in aircraft and rocket primenyayut¬sya VT3-1 titanium alloys; VT14. Specify their composition, assign a mode of heat treatment and justify his choice. Describe alloy microstructure and the reasons for their use in the art.
4. Metal-superalloys. Composition, properties and application in mechanical engineering.
5. Thermoset plastics, their characteristics and the region prime¬neniya.