Given exhaustive answers to 5 questions 4 Option 2 control work on material for the training manual Garbuzova NE
1. Set the temperature quenching, cooling medium and temperatu¬ru holiday spindles for machine tools stainless steel MSt6 which should have a hardness of 35 ... 40HRC. Describe the microstructure and properties of the products.
2. As a result of the heat treatment should have high spring elasticity. For the manufacture of steel chosen 60S2HFA. Specify the structure, assign and justify the regime of thermal treatment, explaining the effect of doping on the transformations occurring in the termiches¬koy treatment of the steel. Describe the structure and properties of the springs after heat treatment.
3. The turbine construction using steel 40H12N8G8MFB (EI481). Specify the composition of the group and determine the steel for its intended purpose. Assign the mode of heat treatment and justify it. Describe structure after heat treatment. How does the operating temperature on the mechanical properties of the steel?
4. castings of complex shape using bronze BrOF7-0,2. Ras encrypt part, describe the structure, provide thermal obrabot¬ku, used to relieve internal stresses resulting from the casting, and describe the mechanical properties of the bronze.
5. Describe the impact of powder and fibrous fillers on the properties of rubber.
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