Anti-seismic structural steel with yield strength being 550MPa grade, and production method thereof

Abstract

The invention relates to an anti-seismic structural steel with the yield strength being 550MPa grade, and a production method thereof. The anti-seismic structural steel contains the following components in percentage by weight: 0.12 to 0.22 percent of carbon, 0.20 to 0.60 percent of silicon, 1.00 to 1.60 percent of manganese, 0.05 to 0.15 percent of aluminum, 0.20 to 0.60 percent of chromium, and the balance ferrum and impurities. According to the anti-seismic structural steel with the yield strength being 550MPa grade, and the production method thereof provided by the invention, thermal mechanical control processing (TMCP) is carried out based on metallurgy processes such as recrystallization and phase change, and hardening treatments such as solution strengthening, precipitation strengthening, dislocation strengthening and grain refining are completed under the specified deformation and temperature conditions, so that the performance of a steel plate at a rolling state can be optimized.

Description

technical field [0001] The invention relates to a high-strength low-alloy controlled-rolling and controlled-cooling steel, which is mainly used for the production of anti-seismic structural steel plates, steel coils and section steel, and specifically relates to an anti-seismic structural steel with a yield strength of 550MPa and a production method thereof. Background technique [0002] Seismic design is mainly to reduce the damage to building structures caused by earthquakes by rationally distributing the force. The traditional anti-seismic method is to absorb the seismic energy through the deformation of structural members such as columns and beams and load-bearing members, which will cause damage or even collapse of structural members. Different from this traditional anti-seismic method, in recent years energy consumption anti-seismic has been developed as a new anti-seismic technology. Low-yield-point steel is the material for energy-dissipating damping components in e...

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Problems solved by technology

[0004] (2) The deformation of the mild steel damper accumulates during operation, which makes the steel harden severely and locally buckle, resulting in the seismic response of the structure seriously inconsistent with the design

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