Large-thickness quenched and tempered FO460 ship steel plate and manufacturing method thereof

Abstract

The invention discloses a large-thickness quenched and tempered FO460 ship steel plate and a manufacturing method of the large-thickness quenched and tempered FO460 ship steel plate. The steel plate comprises the following chemical elements in percentage by mass: C: 0.06%-0.10%; Si: 0.05%-0.14%; Mn: 1.40%-1.80%; S: less than or equal to 0.002%; P: less than or equal to 0.008%; Als: 0.015%-0.045%; N: 0.003%-0.015%; Nb: 0.01%-0.04%; Cu: 0.16%-0.35%; Ni: 0.30%-0.60%; Cr: 0.15%-0.30%; Ti: 0.008%-0.014%; and the balance of Fe and inevitable impurities. The technical requirements of the ship steel plate in severe and harsh ocean environments can be met.

Description

technical field [0001] The invention belongs to the field of iron and steel material preparation, in particular to a large-thickness TMCP state FO460 steel plate for ships and a manufacturing method thereof. Background technique [0002] Driven by the rapid growth of the shipbuilding industry in recent years, the demand for ultra-low ship steel is increasing rapidly year by year. However, my country lacks polar ship design and manufacturing experience, and there is a big gap compared with polar shipbuilding powerhouses such as Finland, Japan, South Korea, the United States and Russia. In 2016, GSI undertook the construction of polar condensate tankers in the Russian Yamal project. In 2017, my country's largest offshore engineering company, CIMC Raffles, undertook the construction of the "Viking Dragon" Arctic drilling platform ordered by Norway. Although Chinese shipbuilding companies have undertaken a small number of orders for ships with low-level ice symbols, there are ...

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Problems solved by technology

However, my country lacks polar ship design and manufacturing experience, and there is a big gap compared with polar ship building powerhouses such as Finland, Japan, South Korea, the United States and Russia.

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