Materials kontrolnaya2 / variant10 on Garbuzova

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Uploaded: 14.09.2012
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Given exhaustive answers to questions 10 5 Option 2 control work on material for the training manual Garbuzova NE
1. Set the temperature quenching, cooling medium and the temperature of tempering steel tie rods MSt5 which should have a hardness of 207 ... 230NV. Describe the microstructure and properties.
2. Cams should have low deformation and high abrasion resistance of the surface layer with a hardness of 750 ... 1000 HV. For the manufacture of selected steel 38HMFA. Specify the composition of the alloy and opredeli¬te group to the destination. Give and justify the regime termiches¬koy and chemical-thermal treatment, explaining the effect of doping on the transformations occurring at all stages of processing the steel. Opi¬shite microstructure and properties are copied after the heat and chemical heat treatment.
3. disks and turbine rotors used steel 15H12VNMF. Specify the composition of the group and determine the steel for its intended purpose. Give and justify the regime of heat treatment and describe the structure. Oharak¬terizuyte mechanical properties of steel.
4. Summarize the basic theory of heat treatment of aluminum alloys applied to industrial alloys duralumin. Specify the composition of the strengthening phases formed during aging duralumin.
5. Describe the relaxation processes of polymers in terms of their physical structure.

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