The isothermal transformation diagram of an alloy is shown below. Please provide

Question

The isothermal transformation diagram of an alloy is shown below.

Please provide detailed solutions, steps and explanations. Thx

Is it a eutectoid alloy, hypo-eutectoid alloy or hyper-eutectoid alloy? What will be the microstructures formed if the following heat treatments are performed. Suddenly cooled to 580degree C and held at that temperature for a very very-long time. Suddenly cooled to 600degree C and held at that temperature for 1 second then suddenly cooled down to 300degree C and held there for 1000 seconds and then quenched suddenly to room temperature. What heat treatment will you impart if the desired structure is 50% fine pearlite and 50 Martensite How will you produce a spheroidite structure in this alloy?

Explanation / Answer

a). Hyper eutectoid alloy. b). i). we will have P structure. i.e. pearlitic ii). we will have A+P structure.

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