High-performance weather-resisting anti-seismic steel for building and production method thereof

Abstract

The invention relates to low alloyed steel used for building and a production method thereof, aiming at solving the defects that the prior building steel has atmospheric corrosion resisting property and does not consider the shock resistance problem. The invention adopts the measures that the low alloyed steel contains components by weight of 0.05-0.16 percent of C, 0.10-0.50 percent of Si, 0.60-1.50 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, 0.15-0.60 percent of Cu, 0.25-0.80 percent of Cr, 0.10-0.50 percent of Ni, 0.01-0.10 percent of V, 0.005-0.030 percent of Ti at least one component of 0.010-0.040 percent of Nb, 0.010-0.050 percent of Als, 0.0010-0.0060 percent of Ca and 0.0010-0.020 percent of RE, and the rest of Fe and unavoidable impurities; and the production method comprises the following steps of molten iron desulphurizing and RH degassing, heating to 1150-1310 DEG C, rough rolling with the temperature being controlled at 1100-1200 DEG C and finishing rolling, wherein the beginning temperature of the finishing rolling is 880-980 DEG C, the rolling reduction ratio of each step is 15-30 percent, the final temperature of the finishing rolling is 800-900 DEG C, and the accumulated rolling reduction ratio of three steps of 35-50 DEG C.

Description

technical field

[0001] The invention relates to steel for construction and a production method thereof, in particular to low-alloy steel with high performance weather resistance and earthquake resistance suitable for construction and a production method thereof. Background technique

[0002] Before the present invention, there were many reports about weathering steel grades used in construction, such as European patent (EP 0841 409 A1), former Soviet patent (SU1822446A3), Japanese patent (Japanese patent application 9-277083), Bethlehem Iron and Steel Company and Pu A patent (US6187117) for the manufacturing method of an improved weather-resistant steel plate containing C, Mn, Nb, V, N, and Ti applied by General Iron and Steel Co., Ltd., which is mainly a steel grade resistant to atmospheric corrosion, and its main The atmospheric corrosion resistance of steel is improved by adding P, Cu, Cr and other elements, and some elements such as As and Co are added, which not only in...