Garbuzova КР2 Option 25

Product description

• As a result of heat treatment, some machine parts must have a solid

Wear-resistant surface layer with a viscous core. For the manufacture of their chosen steel

15HF. Specify the composition and determine the steel group for its intended use. Assign a thermal and

Chemical-thermal treatment, give its justification, explaining the effect of doping on

Transformations occurring at all stages of heat treatment of this steel. Describe

Structure and properties of steel after heat treatment.

• As a result of heat treatment, the crankshafts of ship and automobile

Engines should receive increased strength over the entire section (hardness 250 ... 280 HB).

To make them, steel 40ХФА was chosen. Specify the composition and determine the steel group by appointment.

Tion. Assign and justify the mode of heat treatment, explaining the effect of doping on

Transformation during the heat treatment of this steel. Describe the structure and properties of steel after

Heat treatment.

• For parts operating in weak aggressive environments, steel 30X13 is used.

Specify the composition and determine the steel group by structure. Explain the purpose of chromium in this

Steel, assign and justify the mode of heat treatment.

• The BrBNT-1.9 alloy was chosen for manufacturing current-conducting elastic elements.

Give the chemical composition, heat treatment and the resulting mechanical properties

Material. Describe the processes that occur during heat treatment, and explain the nature

Hardening in connection with the copper-beryllium state diagram.

• Describe the sittals and methods for their production. The effect of the composition and magnitude of the crystals on

Properties of glass. Area of ​​application.