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Temperature zones for heat treatment processes are shown: (i) Identify any two of the heat treatment processes at A, B or C - Leaving Cert Engineering - Question b - 2009

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Temperature zones for heat treatment processes are shown: (i) Identify any two of the heat treatment processes at A, B or C. (ii) Explain allotropy in carbon steel... show full transcript

Worked Solution & Example Answer:Temperature zones for heat treatment processes are shown: (i) Identify any two of the heat treatment processes at A, B or C - Leaving Cert Engineering - Question b - 2009

Step 1

Identify any two of the heat treatment processes at A, B or C.

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Answer

  1. Process A: Annealing or hardening
  2. Process B: Stress relieving or spheroidising / process annealing

Step 2

Explain allotropy in carbon steel.

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Answer

Allotropy in carbon steel refers to the ability of the material to exist in more than one crystalline form. In specific, steel has a Body-Centered Cubic (BCC) structure when cold, which transforms into a Face-Centered Cubic (FCC) structure when heated above the upper critical temperature, demonstrating its allotropic nature.

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