Production method of hot-rolled steel plate made of niobium (Nb)-containing steel

Abstract

The invention discloses a production method of a hot-rolled steel plate made of niobium (Nb)-containing steel, which can effectively lower difficulty of production organization. The hot-rolled steel plate made of the Nb-containing steel comprises the following chemical components by mass percentage: 0.07%-0.12% of C, not more than 0.35% of Si, 1.10%-1.50% of Mn, more than 0 but not more than 0.10% of Nb, not more than 0.025% of P, not more than 0.015% of S and the balance of Fe and unavoidable impurity elements. The production method of the hot-rolled steel plate made of the Nb-containing steel comprises the steps of producing, rough-rolling, finish-rolling, final-rolling, cooling and coiling continuous casting slabs. In the production method, the Nb-containing steel with the same chemical component is favorable for production organization and scheduling; and meanwhile the obtained finished product can meet the use requirements for structural parts in automotive frames, automotive wheels, building structures, engineering machinery and the like. Therefore, the production method is particularly suitable for popularization and application to production of the Nb-containing hot-rolled steel plate.

Description

[0001] This application is a divisional application with an application date of July 8, 2009, an application number of 200910304129.0, and an invention title of hot-rolled niobium-containing steel plate and its production method. technical field [0002] The invention relates to a steel plate and a production method thereof, in particular to a production method of a niobium-containing hot-rolled steel plate. Background technique [0003] At present, the hot-rolled steel plate for structure is the most widely used and used steel material in the plate and strip products. It is mainly used in automobile structure, engineering machinery, building structure and other general structural parts. According to the steel type, it is usually divided into carbon Structural steel and low alloy structural steel. Micro-alloying elements such as vanadium, titanium, and niobium are often added to low-alloy structural steels, and hot-rolled steel sheets with good strength and toughness can be ...

AI Technical Summary

Problems solved by technology

In addition, there are many special steel grades due to different uses, resulting in large differences or crossover in the chemical composition of steel grades and grades with the same mechanical properties. This not only increases the difficulty for the production organization of the smelting and rolling process, but also Inconvenience to welding between steel plates

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