Garbuzova КР2 Option 07

Product description

• Assign a quenching temperature, a cooling medium and a tempering temperature of the springs from

Steel 65G, which must have a hardness of 45 ... 50 HRC. Describe the microstructure and properties.

• As a result of thermal and chemical-thermal treatment, the gears must receive

A hard abrasion-resistant surface layer with a viscous core. To make them

18KhT steel is chosen. Specify the composition and determine the steel group for its intended use. Assign and

Justify the regime of thermal, chemical-thermal treatment, explaining the effect of doping on

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

Microstructure and properties of the surface and the core of the gear after heat treatment.

• For some parts of precision instruments, an elinvar alloy is chosen. Specify the composition and

Determine which group the alloy belongs to by designation. Describe the impact

Alloying elements on the main characteristic of the alloy and the reasons for choosing this alloy.

• For bronze details, bronze БРОЦ4-4-2,5 was chosen. Decipher the composition and describe

Structure of the alloy. Explain the purpose of the alloying elements. Give the characteristics

Mechanical properties of the alloy.

• Phenol-formaldehyde laminates (polyethylene and vinyl plastic). Their properties and

Field of application in mechanical engineering.