Abstract
A thermomagnetic analysis of the maraging 350 steel quenched from 1000 °C and cold rolled with completely martensitic structure is presented. In fast heating and cooling rate (10 °C min −1) tests the start (A s) and final (A f) temperatures of the martensite (M) to austenite (γ) transformation were determined as 690 and 800 °C, respectively. The martensite start (M s) and final (M f) temperatures were 175 °C and 130 °C, respectively. In low heating rate tests, the austenite formation may happen above 510 °C, which is associated with precipitation reactions. Both γ→M and M→γ may progress isothermally. The kinetics of these reactions at selected temperatures were also investigated by thermomagnetic analysis.
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