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| Q. |
Mild steel can be converted into high carbons steel by which of the following heat treatment process? |
| A. | annealing |
| B. | normalizing |
| C. | case hardening |
| D. | nitriding |
| Answer» C. case hardening | |
| Explanation: case hardening, also referred as carburizing increases carbon content of steel, thus, imparting hardness to steel. | |
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