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400 Rub.
1. Assign a quenching temperature, cooling medium and tempering temperature chisel from
Steel U8. Describe the structure and hardness of the tool after heat treatment.
2. As a result of heat treatment, the semiaxes should receive increased strength
Over the entire section (hardness 230 ... 280 HB). For the manufacture of their chosen steel 40HNR. Please specify
Composition and determine the steel group for its intended use. Assign a heat treatment mode,
Give its justification, explaining the effect of doping on the transformations occurring at
Heat treatment of this steel. Describe the structure and properties of steel after thermal
Processing.
3. For some parts in aircraft and missile construction, titanium alloys
VTZ-1; VT14. Specify their composition, assign a heat treatment mode and justify its choice.
Describe the microstructure of the alloys and the reasons for their use in this area.
4. Metal-ceramic high-temperature alloys. Composition, properties and application in
Machine building.
5. Thermoset plastics, their features and scope.
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