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Q420-grade anti-seismic steel and method for producing Q420-grade anti-seismic steel by virtue of steckel mill

A technology of steckel rolling mill and anti-seismic steel, which is applied in metal rolling, metal rolling, workpiece surface treatment equipment, etc., can solve the problems of high strength and low yield ratio, and achieve improved strength and toughness, and low yield ratio , high value-added effect

Inactive Publication Date: 2015-04-29
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Q420 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 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-strength ratio Q420 seismic steel plate, which is unprecedented.

Method used

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  • Q420-grade anti-seismic steel and method for producing Q420-grade anti-seismic steel by virtue of steckel mill
  • Q420-grade anti-seismic steel and method for producing Q420-grade anti-seismic steel by virtue of steckel mill
  • Q420-grade anti-seismic steel and method for producing Q420-grade anti-seismic steel by virtue of steckel mill

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The Q420 anti-seismic steel, the percentage components of the Q420 anti-seismic steel are: C0.07wt%, Si0.35wt%, Mn1.47wt%, S0.025wt%, P0.032wt%, Nb0.028wt%, V0.04wt% %, Ti0.03wt%, N0.01wt%, Als0.03wt%, and the rest are Fe and other impurities, which are unavoidable impurities.

[0025] The method for producing Q420 grade shock-resistant steel with this steckel mill: firstly, after heating the slab and spraying water to remove phosphorus, the rough rolling and finish rolling are continuously completed on the same double-stand compact steckel mill, and the resulting The steel plate feeding and coiling machine is coiled, and then naturally air-cooled to room temperature to obtain a high-strength, low-yield ratio Q420 seismic steel plate, in which the percentage components of the slab are: C0.07wt%, Si0.35wt%, Mn1 .47wt%, S0.025wt%, P0.032wt%, Nb0.028wt%, V0.04wt%, Ti0.03wt%, N0.01wt%, Als0.03wt%, the rest are Fe and other impurities, impurities are unavoidable of impuriti...

Embodiment 2

[0037]The Q420 anti-seismic steel, the percentage composition of the Q420 anti-seismic steel is: C0.10wt%, Si0.40wt%, Mn1.05wt%, S0.028wt%, P0.030wt%, Nb0.032wt%, V0.06wt% %, Ti0.07wt%, N0.007wt%, Als0.035wt%, the rest is Fe and unavoidable impurities.

[0038] The method for producing Q420 grade shock-resistant steel with this steckel mill: firstly, after heating the slab and spraying water to remove phosphorus, the rough rolling and finish rolling are continuously completed on the same double-stand compact steckel mill, and the resulting The steel plate feeding and coiling machine is coiled, and then naturally air-cooled to room temperature to obtain a high-strength, low-yield ratio Q420 earthquake-resistant steel plate. The percentage components of the slab are: C0.10wt%, Si0.40wt%, Mn1.05wt%, S0.028wt%, P0.030wt%, Nb0.032wt%, V0.06wt%, Ti0.07wt%, N0.007wt%, Als0.035wt%, the rest is Fe and unavoidable impurities .

[0039] Specific steps are as follows:

[0040] Step 1. ...

Embodiment 3

[0050] The Q420 anti-seismic steel, the percentage components of the Q420 anti-seismic steel are: C0.15wt%, Si0.38wt%, Mn1.70wt%, S0.033wt%, P0.015wt%, Nb0.035wt%, V0.05wt% %, Ti0.05wt%, N0.008wt%, Als0.020wt%, the rest is Fe and unavoidable impurities.

[0051] The method for producing Q420 grade shock-resistant steel with this steckel mill: firstly, after heating the slab and spraying water to remove phosphorus, the rough rolling and finish rolling are continuously completed on the same double-stand compact steckel mill, and the resulting The steel plate feeding and coiling machine is coiled, and then naturally air-cooled to room temperature to obtain a high-strength, low yield ratio Q420 seismic steel plate, in which the percentage components of the slab are C0.15wt%, Si0.38wt%, Mn1 .70wt%, S0.033wt%, P0.015wt%, Nb0.035wt%, V0.05wt%, Ti0.05wt%, N0.008wt%, Als0.020wt%, the rest is Fe and unavoidable impurities.

[0052] Specific steps are as follows:

[0053] Step 1. First...

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Abstract

The invention relates to Q420-grade anti-seismic steel and a method for producing the Q420-grade anti-seismic steel by virtue of a steckel mill, and belongs to the technical field of metal material processing and forming. The Q420-grade anti-seismic steel consists of the following components: C, Si, Mn, S, P, Nb, V, Ti, N, Als and the balance of Fe and inevitable impurities. A Q420-grade anti-seismic steel sheet which is high in strength and low in yield ratio can be prepared by heating a slab, spraying water and removing phosphorous, continuously completing rough rolling and finish rolling on a same dual-stand compact steckel mill, cooling a steel sheet obtained from finish rolling by virtue of a coiling machine and naturally air-cooling to room temperature. By adding such micro-alloying elements as Nb and V to the Q420-grade anti-seismic steel, the strength and the tenacity of the Q420-grade anti-seismic steel sheet are effectively improved; in the process of producing the Q420-grade anti-seismic steel sheet, the method disclosed by the invention fully explores the potential of the dual-stand compact steckel mill of kunming Iron and Steel; the variety of plate and strip products is expanded and product structure is optimized.

Description

technical field [0001] The invention relates to a Q420 anti-seismic steel and a method for producing the Q420 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 yield strength f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14B21B1/22B21B45/08
CPCC22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14B21B1/22B21B45/08
Inventor 阴树标赵宇曹建春张卫强张志波李金柱杨春雷张红斌陈伟朱道飞黄帮福王建军张小明李庆超周晓龙
Owner KUNMING UNIV OF SCI & TECH
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