Question
Download Solution PDFDuring normalizing process of steel, the specimen is heated _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Various heat treatment process and their methods are described in the table below:
|
Heat treatment process |
Method |
|
Normalising |
The specimen is heated beyond upper critical temperature and then cooled in still air. |
|
Annealing |
The specimen is heated beyond upper critical temperature and held it there for some time and then cooled slowly in furnace. |
|
Tempering |
The specimen is reheated to temperature below lower critical temperature followed by any desired rate of cooling. |
|
Spherodizing |
The specimen is heated slightly above the lower critical temperature and held at this temperature for some time and then cooled slowly in furnace. |
|
Hardening |
The specimen is heated above the upper critical temperature and held at this temperature for some time and then quenched (cooled suddenly) in a suitable cooling medium. |
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