A kind of q460 grade seismic steel and method for producing q460 grade seismic steel by furnace coil rolling mill

Abstract

The invention relates to Q460 level shock resisting steel and a method for producing Q460 level shock resisting steel by using a steekle mill and belongs to the technical field of metal material processing and moulding. The Q460 level shock resisting steel comprises the following components: C, Si, Mn, S, P, Nb, V, Ti, N, Als and the balance of Fe and other impurities. The method comprises the following steps: firstly, after heating a slab and spraying water to dephosphorize, continuously realizing rough rolling and finish rolling on a same double-rack compact steekle mill; feeding the steel plate after finish rolling to a reeling machine to be reeled by rows; and then naturally air-cooling to room temperature to obtain the Q460 level shock resisting steel with high strength and low yield ratio. By adding microalloy elements such as Nb, V and the like, the strength and toughness of the Q460 level shock resisting steel are effectively improved. According to the method for producing the Q460 level shock resisting steel, the potential of a kunming steel double-rack compact steekle mill is fully explored, the variety of strip plates is expanded and the product structure is optimized.

Description

technical field [0001] The invention relates to a Q460-grade anti-seismic steel and a method for producing the Q460-grade anti-seismic steel with a steel coil mill, belonging to the technical field of metal material processing and forming. Background technique [0002] As a construction steel, the anti-seismic steel plate has the characteristics of high tensile strength, low yield ratio, excellent Z-direction performance, and good welding performance. With the development of high-rise buildings and the occurrence of geological disasters in recent years, the world and my country have paid attention to the development of seismic structural steel. The main anti-seismic steels used in the United States are ASTM A992 structural steel and ASTM A572 structural steel (additional yield ratio requirements). In recent years, Japan has developed a series of low yield ratio seismic structural steels, such as HT490 steel, HT590 steel and HT780 steel, etc., all of which have a narrow yiel...

AI Technical Summary

Problems solved by technology

At present, the Q460 anti-seismic steel plate developed in my country mainly adopts the production process of medium and heavy plate, and all adopt hot continuous rolling technology. There is no report on the production of anti-seismic steel plate by using a single double-stand compact stove coil rolling mill. For this reason, Wuhan Iron and Steel Group Corporation ( Kunming Iron and Steel Co., Ltd.) double-stand compact steckel rolling mill, which continuously completes rough rolling, intermediate rolling and finishing rolling, thus develops high-strength, low-yield ratio Q460 seismic steel plate, which is unprecedented.

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