GATE MT 2011 Q39. Match the heat treatment processes in group 1 with resultant microstructure of steel in group 2.
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Correct answer is option D. Martempering is also known as stepped quenching or interrupted quenching. In this process, steel is heated above the upper critical point (above the transformation range) and then quenched in a salt, oil, or lead bath kept at a temperature of 150-300 °C. The workpiece iRead more
Correct answer is option D.