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 hot-oil, molten-salt, or molten-lead bath kept at a temperature of 150-300 °C. The workpiece is maintained at a temperature above the martensite start (Ms) point until uniform temperature is achieved throughout its cross-section.
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 hot-oil, molten-salt, or molten-lead bath kept at a temperature of 150-300 °C. The workpiece is maintained at a temperature above the martensite start (Ms) point until uniform temperature is achieved throughout its cross-section.
Source: Wikipedia "Martempering" · CC BY-SA 4.0
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