Method for manufacturing a 5NI steel plate with a low remanence and an excellent surface quality to be used in a ship

Method for manufacturing a 5NI steel plate with a low remanence and an excellent surface quality to be used in a ship

Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting→LF refining→RH high vacuum degassing→treatment with Ca→continuous casting→a slow cooling treatment to the slab→...

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Bibliographische Detailangaben
Hauptverfasser: Zhou, Yonghao, Liu, Jun, Gao, Jun, Di, Menglong, Meng, Yu, Miao, Pifeng, Gao, Liang, Wu, Jinming, Lu, Sha, Han, Buqiang, Bai, Yun, Xu, Xiaohong, Li, Guozhong, Liao, Shuquan, Liu, Zhaoxia
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting→LF refining→RH high vacuum degassing→treatment with Ca→continuous casting→a slow cooling treatment to the slab→cleaning the surface of the slab→heating→rolling→quenching twice→tempering. The constituents comprise a low content of carbon, a low content of silicon, and 5% Ni, with V and Nb being added thereto, which improves the hardenability, improves the toughness at a low temperature, and improves the starting temperature of non-recrystallization of austenite. The steel plate can be subjected to high-temperature rolling and high-temperature quenching so as to significantly improve the shape of the plate, thus being applicable to the production of thin products.