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Heat treatment of submarine steel

Posted:2021-06-01 11:26:00

In order to improve the comprehensive properties of submarine steel and give full play to its performance potential, submarine steel is usually quenched and tempered.

Before 1960s, pressure quenching machine and high-pressure water cooling were used to obtain low-carbon martensite, and then tempered to obtain tempered martensite with good comprehensive properties. But in this way, the steel plate is easy to deform and its properties are not uniform; Since the 1970s, the quenching process has been changed to the radiation press quenching machine without oxidation heating, which not only solves the uniformity of steel plate performance, but also improves the deformation of steel plate, and obtains the steel plate with good shape. The holding time of quenching heating is usually 23min / mm, the holding time of tempering is usually 58min / mm, and the quenching temperature is about 900℃.