160mm-thick Q345E-Z35 steel plate for high-rise buildings and production method thereof
A Q345E-Z35, high-rise building technology, applied in the field of steel, can solve problems such as difficult production and special requirements for process equipment
Active Publication Date: 2013-06-12
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology
Q345E-Z35 steel for high-rise buildings with a thickness of 160mm cannot be produced because of its difficulty in production and special requirements for process equipment
Method used
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Embodiment 1
[0034] The chemical composition of table 3 embodiment 3 steel
[0035]
[0036] Invention process is as embodiment 1.
[0037] Steelmaking part composition: the chemical composition design of the steel plate of the present invention adopts low carbon equivalent, Mn-Nb-V-Ni series ferrite+pearlite steel, and the applied strengthening mechanism is structure strengthening, fine grain strengthening, precipitation strengthening and solidification Solvent strengthening. C mainly forms carbides with other elements to strengthen the structure and precipitation, and improve the strength of the steel plate; Mn mainly plays the role of solid solution strengthening and lowering the phase transition temperature, and improves the strength of the steel plate; Nb plays the role of fine grain strengthening, and when the steel ingot is heated , the solid solution Nb can prevent the growth of austenite grains; after two-stage rolling, the C and N compounds of V are precipitated to improve th...
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Abstract
The invention discloses a 160mm-thick Q345E-Z35 steel plate for high-rise buildings and a production method thereof. The steel plate guarantees performance and flaw detection. The steel plate comprises the following chemical components by weight percent (wt%): not more than 0.19wt% of C, not more than 0.50wt% of Si, 1.20-1.60wt% of Mn, not more than 0.015wt% of P, not more than 0.003wt% of S, notmore than 0.20wt% of microalloying elements (Nb, V, Ti and Ni), not more than 0.050wt% of Als and the balance Fe and residual elements. The invention has the following beneficial effects: the aim that the total level of various inclusions is not beyond 3.0 is achieved by rationally adopting the chemical component design of multiple complex microalloying elements and the ladle furnace (LF) plus vacuum degassing (VD) process to ensure the cleanliness of steel, and the grain size of steel is ensured to reach 9.0 level through controlled rolling and controlled cooling as well as normalizing treatment.
Description
technical field [0001] The invention relates to steel products, in particular to a 160mm thick Q345E-Z35 steel plate for high-rise buildings and a production method thereof. Background technique [0002] With the rapid development of my country's national economy, the development of steel for high-rise buildings is also developing in the direction of extra thick, extra wide and high performance. Steel for high-rise buildings has higher requirements on the strength and toughness of steel plates, yield ratio, and lamellar tear resistance. Currently, there are not many domestic steel plants that can produce steel plates for high-rise buildings with a thickness of 160 mm. Q345E-Z35 steel for high-rise buildings with a thickness of 160mm cannot be produced because of its difficulty in production and special requirements for process equipment. Contents of the invention [0003] The purpose of the present invention is to provide a 160mm thick Q345E-Z35 steel plate for high-rise ...
Claims
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IPC IPC(8): C22C38/04C22C33/04C21D8/02
CPCY02P10/20
Inventor 雷文慧朱书成许少普张立新崔冠军刘庆波郭艳芳庞百鸣陈平张兵朱成杰许春
Owner NANYANG HANYE SPECIAL STEEL CO LTD