Garbuzova КР1 Option 36

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Option 36

• Draw a phase diagram for the case of the formation of a stable chemical

Connection. Specify the structural components in all areas of this diagram and describe

The structure of typical alloys of various compositions occurring in this system.

• What is the limit of endurance? How can I increase the endurance limit

Springs? Describe the essence of the proposed method.

• Draw a diagram of the iron-iron carbide state, indicate the structural

Components in all areas of the diagram, describe the transformations and construct a curve

Cooling (using the phase rule) for an alloy containing 0.1% C. What is the structure of this

Alloy at room temperature and how such an alloy is called?

• Draw a diagram of the isothermal transformation of austenite for steel V8, apply

On it a curve of a mode of the thermal processing providing hardness obtaining 60 ... 63 HRC.

Indicate how this regime is called, describe the nature of the transformations and what structure

Is obtained in this case.

• What is the negative effect of cementite mesh on the properties

Tool steel U10 and U12? What heat treatment can destroy it? FROM

Using the iron-cementite state diagram, justify the selected thermal mode

Processing.