STUDY ON BEHAVIOR OF TRAPPED HYDROGEN IN 18Ni MARAGING STEEL BY THERMAL HYDROGEN EVOLUTION TECHNIQUE

摘要

The interaction of hydrogen with interface between the precipitates and the martensitie matrixin 18Ni maraging steel has been studied by means of thermal evolution hydrogen technique us-ing gas chromatograph as hydrogen detector.An evolution rate peak has been observed at 451K.The height of the peak relates to the amount and distribution of the precipitates.Theactivation energy for hydrogen escaping from the trap sites is 23.2 kJ/mol.