Low-yield-strength anti-seismic steel plate for building and production method of steel plate

A low-yield strength, construction-use technology, applied in the field of iron and steel metallurgy, can solve problems such as increasing construction costs and affecting the appearance of buildings, and achieve the effects of optimizing the rolling process, reducing the effect of grain boundary strengthening, and good low-cycle fatigue characteristics

Inactive Publication Date: 2015-12-23
HEBEI IRON AND STEEL
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this traditional anti-seismic technology has certain defects. Based on the premise of this anti-seismic technology, in order to improve the anti-seismic level of the building, the size of the structural support members must be made as large as possible, but this will not only increase the construction cost but also affect beauty of the building

Method used

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  • Low-yield-strength anti-seismic steel plate for building and production method of steel plate
  • Low-yield-strength anti-seismic steel plate for building and production method of steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: The low-yield-strength anti-seismic steel plate used in this building adopts the following chemical composition and production process.

[0019] Chemical composition (wt): C0.026%, Si0.041%, Mn0.58%, P0.01%, S0.005%, N0.0050%, Ti0.034%, the balance is Fe and unavoidable impurities .

[0020] Production process: (1) Steel slabs are prepared by conventional smelting and continuous casting processes; the thickness of the steel slabs is 220mm.

[0021] (2) Rolling process: the heating temperature of the billet is 1200°C; the starting rolling temperature of the first stage (rough rolling) is 1110°C, the final rolling temperature is 1040°C, and the thickness to be warmed is 90mm; the starting rolling temperature of the second stage (finish rolling) is 930°C , The final rolling temperature is 880°C; hot straightening after rolling, and air cooling to obtain a steel plate with a thickness of 40mm.

[0022] (3) Heat treatment process: the heating temperature of t...

Embodiment 2

[0024] Embodiment 2: The low-yield-strength anti-seismic steel plate used in this building adopts the following chemical composition and production process.

[0025] Chemical composition (wt): C0.033%, Si0.046%, Mn0.42%, P0.018%, S0.008%, N0.0048%, Ti0.029%, the balance is Fe and unavoidable impurities .

[0026] Production process: (1) The billet is prepared by conventional smelting and continuous casting process; the thickness of the billet is 230mm.

[0027] (2) Rolling process: the heating temperature of the billet is 1220°C; the starting rolling temperature of the first stage (rough rolling) is 1120°C, the final rolling temperature is 1050°C, and the thickness to be warmed is 120mm; the starting rolling temperature of the second stage (finish rolling) is 950°C , the final rolling temperature is 900°C; hot straightening after rolling, and air cooling to obtain a steel plate with a thickness of 55mm.

[0028] (3) Heat treatment process: the heating temperature is 900° C.,...

Embodiment 3

[0030] Embodiment 3: The low-yield-strength anti-seismic steel plate used in this building adopts the following chemical composition and production process.

[0031] Chemical composition (wt): C0.010%, Si0.024%, Mn0.60%, P0.012%, S0.010%, N0.0035%, Ti0.01%, the balance is Fe and unavoidable impurities .

[0032] Production process: (1) The billet is prepared by conventional smelting and continuous casting process; the thickness of the billet is 230mm.

[0033] (2) Rolling process: the heating temperature of the billet is 1250°C; the starting rolling temperature of the first stage (rough rolling) is 1100°C, the final rolling temperature is 1050°C, and the thickness to be warmed is 100mm; the starting rolling temperature of the second stage (finish rolling) is 960°C , The final rolling temperature is 910°C; hot straightening after rolling, and air cooling to obtain a steel plate with a thickness of 45mm.

[0034] (3) Heat treatment process: the heating temperature is 920° C., ...

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Abstract

The invention discloses a low-yield-strength anti-seismic steel plate for a building and a production method of the steel plate. The production method comprises a rolling procedure and a heat treatment procedure. The anti-seismic steel plate comprises, by mass, 0.010%-0.060% of C, 0.01%-0.05% of Si, 0.30%-0.60% of Mn, 0%-0.020% of P, 0%-0.010% of S, 0.01%-0.05% of Ti, 0%-0.006% of N, and the balance Fe and inevitable impurities. The steel plate does not contain precious metal elements, smelting cost is low, no equipment needs to be added in the production course, the process is simple, and the steel plate has high adaptability and promotional value and meanwhile has a high cost-performance ratio and good market prospects. The yield strength of the anti-seismic steel plate obtained through the method ranges from 205 MPa to 245 MPa, the tensile strength of the anti-seismic steel plate ranges from 300 MPa to 400 MPa, the elongation percentage of the anti-seismic steel plate is larger than 50%, the anti-seismic steel plate has a good low-cycle fatigue property, and various indexes of the anti-seismic steel plate meet anti-seismic property requirements completely. According to the method, the steel plate is made to have excellent welding performance through reasonable composition design, the rolling process and the heat treatment means, and the requirement of the high-performance building steel for the welding performance is met.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, in particular to an anti-seismic steel plate with low yield strength for construction and a production method thereof. Background technique [0002] Seismic design is mainly to reduce earthquake damage by rationally distributing the inertial force and energy of the earthquake. There are two types of anti-seismic technology: structural anti-seismic technology and energy dissipation anti-seismic technology. Structural anti-seismic technology mainly absorbs earthquake energy through the deformation of building columns and beams to achieve the purpose of anti-seismic, that is, relying on the performance of the structural parts themselves to resist the damage of earthquakes. However, this traditional anti-seismic technology has certain defects. Based on the premise of this anti-seismic technology, in order to improve the anti-seismic level of the building, the size of the structural support m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D8/02
Inventor 陈振业王晓书李建新吝章国刘丹刘宏强刘丽香张海军
Owner HEBEI IRON AND STEEL
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