Garbuzova KR2 Option 23

Product description

• Spring made of steel 75 after properly tempered and tempered

Has a hardness significantly higher than that stipulated by the technical conditions. Than

Is this defect caused and how can it be corrected? Specify the structure and firmness that

High elastic properties of the springs.

• Steel P9F5 was chosen for making machine taps and dies. Specify the composition;

Designate and justify the heat treatment regime, explaining the effect of alloying elements on

Transformations occurring at all stages of heat treatment. Describe the microstructure and

Properties of steel after heat treatment.

• For the manufacture of power blades of aviation gas turbines, an alloy

XH77TUP (EI437B). Specify the composition and determine the alloy group for the intended purpose. Assign Mode

Heat treatment and describe the effect of temperature on the characteristics of heat resistance of this

Alloy in comparison with heat-resistant steels.

• For the manufacture of a number of parts in shipbuilding, brass LO70-1 is used. Please specify

Composition and describe the structure of the alloy. Give a general characteristic of mechanical properties

Alloy and the reasons for introducing tin into this brass.

• Describe the polar thermoplastic plastics (polyamides, penton, polycarbonates

and etc.). Their composition, properties and scope.