Content: 41003101505690.rar (225.17 KB)
Uploaded: 03.10.2014

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1. Select the grade of cast iron for the manufacture of responsible machine parts. Please specify
Composition, processing, structure and basic mechanical properties.
2. Cams must have minimal deformation and high wear resistance at
Hardness of the surface layer of 750-1000 HV. For their manufacture, steel 35ХМЮА is chosen.
Decipher the composition of the steel and determine the group of steel for the purpose. Assign and justify
Regime of thermal and chemical-thermal treatment, explaining the effect of doping on
Transformations occurring at all stages of the processing of a given steel. Describe the microstructure and
Properties of the jaws after heat treatment.
3. For the manufacture of parts operating in corrosive environments, steel
A) decipher the composition and determine the group of steel for its intended use;
B) explain the purpose of the alloying elements introduced into this steel;
C) designate and justify the heat treatment mode and describe the structure and properties
Steel after processing.
4. For the manufacture of a number of parts in aircraft construction, an alloy MA2 is used. Decrypt
Composition, give the characteristics of mechanical properties and specify the method of manufacturing parts from
This alloy.
5. Describe the antifriction coatings of metals with polymers. Give a characterization
Their properties and conditions of use.
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