A production method of steel for glass curtain wall pre-embedded fasteners
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A technology of glass curtain wall and production method, which is applied in the direction of workpiece heating device, workpiece surface treatment equipment, manufacturing tools, etc., which can solve the problems of poor toughness, high production cost, and poor atmospheric corrosion resistance, so as to improve wear resistance and strength , Improve the effect of weather resistance
Active Publication Date: 2021-08-10
JIANGSU LIHUAI IRON AND STEEL CO LTD +1
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The disadvantages of the glass curtain wall pre-embedded fasteners made of this steel are poor atmospheric corrosion resistance, poor toughness, and high production costs.
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[0047] Prepared by the following production process:
[0048] (1) Hot metal pretreatment: adopt the KR desulfurization method, stir the hot metal in the ladle, stir continuously for 8-10 minutes, form a vortex, gradually put 450Kg~500Kg CaO+CaF2 mixed desulfurizer into the center of the vortex, and keep stirring the hot metal to desulfurize fully react with the sulfur in the molten iron, and then remove the slag by the slag remover to remove the desulfurization products, reduce the S content of the molten iron, and the slag removal rate reaches more than 90%, ensuring that the S of the molten iron after desulfurization is <0.005%;
[0049] (2) Converter smelting: Converter adopts peroxidation blowing, control tapping C ≤ 0.05%, first add deoxidizer aluminum cake according to tapping C, then use metal manganese, nickel plate, low carbon ferrochrome to adjust alloy content, and finally add Lime and low-titanium refining slag; ensure that the refining furnace C≤0.06%, Mn: 0.25%-0...
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Abstract
The invention discloses a steel for pre-embedded fasteners for glass curtain walls and a production method thereof. The chemical composition mass percentages are C: 0.06%-0.09%, Si: ≤0.10%, Mn: 0.30%-0.40%, Cr: 0.40%‑0.45%, Ni: 0.40%‑0.44%, Mo: 0.35%‑0.40%, Cu: 0.20%‑0.25%, Al: 0.020%‑0.050%, Ti: 0.010%‑0.030%, P≤0.018% , S≤0.010%, [O]≤0.0015%, As+Sn+Sb+Pb+Bi≤0.035%, the balance is Fe. The present invention designs relatively low C, Si, Mn contents, and adds appropriate amount of Cr, Ni, Mo, Cu, Ti, Al and other elements to the steel, so as to ensure the strength, improve the toughness and corrosion resistance of the steel, and at the same time Improve solderability. Compared with the conventional Q355B steel plate, the production method of the present invention reduces the steel plate shearing process and material waste, so the present invention has the advantages of high efficiency, economy, safety and the like, and can well overcome the traditional Q355B steel plate for manufacturing embedded fasteners. Shortcomings, to achieve high-efficiency, energy-saving production, improve market competitiveness.
Description
technical field [0001] The invention relates to steel for building fasteners in the iron and steel industry, in particular to steel for pre-embedded fasteners for glass curtain walls and a production method thereof. Background technique [0002] Glass curtain wall is a new type of modern wall form, which was widely used in the design of public buildings after World War II. The glass curtain wall applies a large area of glass to the exterior wall of the building to show the modern style of the building, give full play to the characteristics of the glass itself, and make the building look unique, thus giving people a new feeling. Compared with the traditional building enclosure structure, the glass curtain wall has the advantages of light weight, good light transmission, good sound insulation effect, heat insulation, moisture resistance, and high wind pressure resistance. At the same time, it also has single construction materials, convenient construction, and short construc...
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