Garbuzova КР2 Option 43

Product description

• Springs made of steel 65 after properly tempered and tempered

Have a hardness significantly lower than required by the specifications. What caused this

Defect and how can I fix it? Indicate what kind of hardness and structure provide high

Elastic properties of springs.

• As a result of heat treatment, the gears should receive a hard

Wear-resistant surface layer with a viscous core. For their manufacture, steel

18HNMFA. Decipher the composition and determine the group of steel for the purpose. Assign Mode

Thermal and chemical-thermal treatment, give its justification, explaining the impact

Doping for transformations occurring during the heat treatment of a given steel. Describe

Microstructure and properties of steel after heat treatment.

• For parts operating in an oxidizing atmosphere, steel 08X18N12T is used.

Decipher the composition, explain the purpose of chromium in this steel. Justify the choice of steel for

Of these working conditions.

• For worm pairs, bronze BrOTSS4-4-17 was chosen. Decode the composition, explain

Purpose alloying elements and high antifriction properties of this bronze.

• Indicate the main features of plastics as a structural material and

Recommendations on the use of plastics in machine building.