Method for preparing 160MPa grade low-yield-point building aseismicity steel

A technology with low yield point and manufacturing method, which is applied in the field of steel production, can solve the problems of high production process cost, achieve the effects of reducing strength, facilitating the coarsening of inclusions, and increasing temperature

Active Publication Date: 2014-10-08
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a manufacturing method of 160MPa level low yield point building anti-seismic steel to solve the technical problem of high cost in the existing steel production process

Method used

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  • Method for preparing 160MPa grade low-yield-point building aseismicity steel
  • Method for preparing 160MPa grade low-yield-point building aseismicity steel

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Embodiment 1

[0029] The manufacturing method of the 160MPa level low-yield-point building anti-seismic steel related to the present invention, the chemical composition of the steel involved is calculated by mass percentage as follows:

[0030] C: 0.001% to 0.005%, Si: ≤0.02%, Mn: 0.10% to 0.8%, Al: 0.01% to 0.06%, P: ≤0.01%, S: ≤0.004%, N: ≤0.004%, Ti: 0.01% to 0.08%, B: 0.0005% to 0.001%, and the rest is Fe and unavoidable impurities.

[0031] preferred, see below figure 1 , the technical process (manufacturing method) of the 160MPa grade low yield point building anti-seismic steel comprises:

[0032] S101, molten steel is refined and then continuously cast to obtain a slab.

[0033] S102, heating the slab.

[0034] Preferably, the heating of the slab specifically includes: heating the slab to 1100°C to 1150°C.

[0035] S103, performing rough rolling.

[0036] S104, heating by electromagnetic induction.

[0037] Preferably, the heating by electromagnetic induction is specifically: h...

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Abstract

The invention discloses a method for preparing 160MPa grade low-yield-point building aseismicity steel. The steel comprises the following chemical components in percentage by mass: 0.001-0.005% of C, less than or equal to 0.02% of Si, 0.10-0.8% of Mn, 0.01-0.06% of Al, less than or equal to 0.01% of P, less than or equal to 0.004% of S, less than or equal to 0.004% of N, 0.01-0.08% of Ti, 0.0005-0.001% of B, and the balance of Fe and inevitable impurities. Through a series of processes of fine smelting, continuous casting, heating, rough rolling, electromagnetic sensation heating, fine rolling, laminar cooling, coiling and the like, the yield strength of the 160MPa grade low-yield-point building aseismicity steel achieves the 140-180MPa grade, the ductility is greater than 50%, good plastic deformation and impact toughness are achieved, and meanwhile an alloy is relatively low in cost and good in welding performance and low-cycle fatigue property, and the process is easy to achieve.

Description

technical field [0001] The present application relates to the technical field of steel production, in particular to a method for manufacturing earthquake-resistant building steel with a low yield point of 160 MPa. Background technique [0002] Low yield point building seismic steel is mainly used for building dampers, which can effectively protect the main load-bearing structures and reduce the damage to buildings caused by vibration. These anti-seismic devices are subjected to earthquake loads before the main structural parts, and yield first, and absorb earthquake energy by repeated loads to protect the safety of the main structure of the building. Compared with other energy-consuming materials, it has the advantages of simple structure, economical and durable, convenient replacement after earthquake, and strong reliability. It can be used not only for the earthquake resistance of new buildings, but also for the improvement of the earthquake resistance of old buildings. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D8/02
Inventor 姚志强郭佳刘杰李飞崔阳朱国森
Owner SHOUGANG CORPORATION
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