Method for smelting low-cost checkered steel plate for galvanization

Abstract

The invention belongs to the field of smelting, and relates to a smelting method of a low-cost galvanized checkered steel plate, which can reduce the smelting cost. According to the technical scheme, the low-cost checkered steel plate for galvanization comprises the following components in percentage by mass: 0.10-0.16% of C, 0-0.08% of Si, 0.15-0.25% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.01-0.07% of Al and the balance of Fe and trace impurities. The smelting method of the low-cost checkered steel plate for galvanization comprises the following steps: converter smelting: properly adding scrap steel and molten iron according to a converter volume ratio; the C content is less than 0.16% and the P content is less than 0.020% at the blowing end point of the converter; and in the tapping process, silicon-manganese and aluminum particles (pellets) are added for deoxidation, and then manganese alloying, LF refining and continuous casting are carried out on the manganese-carbon alloy according to the lower limit of the manganese content in the components, wherein the sum of the 100% yield of the manganese alloy, the residual manganese content at the end point of the converter and the increased manganese of the silicon-manganese is the sum of the 100% yield of the manganese alloy, the residual manganese content and the increased manganese content of the silicon-manganese.

Description

Technical Field

[0001] The invention belongs to the field of smelting and relates to a smelting method of a low-cost galvanized patterned steel plate. Background Art

[0002] Galvanized patterned steel plate is a patterned steel plate with a special surface treatment. It is characterized by regular or irregular pattern patterns on the surface. It is galvanized after pickling to enhance its corrosion resistance. This plate combines the anti-slip properties of the patterned plate and the corrosion resistance of the galvanized plate. It is beautiful, durable and easy to process. It is widely used in the construction industry, transportation, machinery manufacturing and other fields.

[0003] Currently, the production cost of galvanized patterned steel plates is relatively high. Summary of the invention

[0004] In order to overcome the defects in the above-mentioned related technologies, the present invention proposes a low-cost smelting method of a patterned steel plate for galvanizing, which can reduce the smelting cost.

[0005] The smelting method of the low-cost galvanized patterned steel plate comprises: the mass percentage of the components of the low-cost galvanized patterned steel plate is: C 0.10-0.16, Si 0-0.08, Mn 0.15-0.25, P ≤0.020, S ≤0.010, Al0.01-0.07, and the balance is Fe and trace impurities.

[0006] The smelting method of the low-cost galvanized patterned steel plate comprises: Converter smelting: add scrap steel and molten iron appropriately according to the furnace volume ratio; the C content at the converter blowing end point is less than 0.16%, and the P content is less than 0.020%; in the steel-making process, silicon manganese and aluminum particles (shots) are first added for deoxidation, and then manganese-carbon alloy is alloyed according to the manganese content lower limit of the composition of 100% yield of manganese alloy plus the residual manganese content at the converter end point plus silicon manganese.

[0007] LF refining: deep desulfurization is first performed before LF refining to ensure that sulfur is ≤0.010%, and the temperature is adjusted at the same time; then fine-tuning of C, Al, and Mn components is performed; then silicon-calcium wire is fed at 1.5 m / t; after the silicon-calcium wire is fed, weak argon stirring is performed for ≥5 minutes. Continuous casting.

[0008] The converter smelting method further comprises: sampling and analyzing the converter endpoint components (mass percentage) after steel tapping: C: 0.097, Si 0.012, Mn 0.144, P 0.0035, S 0.0147, Al 0.008.

[0009] The LF refining method also includes: LF endpoint composition (mass percentage): C: 0.111, Si 0.055, Mn 0.179, P 0.004, S 0.003, Al 0.026.

[0010] The method for smelting the low-cost galvanized patterned steel plate further includes: performing weak stirring for 6 minutes and then continuous casting after completing LF refining.

[0011] The beneficial effects of the present invention are: Through its designed components and simple process flow, it is suitable for the galvanizing process after pickling of patterned steel plates, which can solve the problem of residual iron oxide scale on the surface after pickling and improve the pickling efficiency. This smelting method not only has a simple process flow, but also its designed components are suitable for using low-cost alloys, ultimately reducing smelting costs. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0013] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0014] The smelting method of the low-cost galvanized patterned steel plate comprises: the mass percentage of the components of the low-cost galvanized patterned steel plate is: C 0.10-0.16, Si 0-0.08, Mn 0.15-0.25, P ≤0.020, S ≤0.010, Al0.01-0.07, and the balance is Fe and trace impurities.

[0015] The smelting method of the low-cost galvanized patterned steel plate comprises: Converter smelting: add scrap steel and molten iron appropriately according to the furnace volume ratio; the C content at the converter blowing end point is less than 0.16%, and the P content is less than 0.020%; in the steel-making process, silicon manganese and aluminum particles (shots) are first added for deoxidation, and then manganese-carbon alloy is alloyed according to the manganese content lower limit of the composition of 100% yield of manganese alloy plus the residual manganese content at the converter end point plus silicon manganese.

[0016] LF refining: deep desulfurization is first performed before LF refining to ensure that sulfur is ≤0.010%, and the temperature is adjusted at the same time; then fine-tuning of C, Al, and Mn components is performed; then silicon-calcium wire is fed at 1.5 m / t; after the silicon-calcium wire is fed, weak argon stirring is performed for ≥5 minutes. Continuous casting.

[0017] The converter smelting method further comprises: sampling and analyzing the converter endpoint components (mass percentage) after steel tapping: C: 0.097, Si 0.012, Mn 0.144, P 0.0035, S 0.0147, Al 0.008.

[0018] The LF refining method also includes: LF endpoint composition (mass percentage): C: 0.111, Si 0.055, Mn 0.179, P 0.004, S 0.003, Al 0.026.

[0019] The method for smelting the low-cost galvanized patterned steel plate further includes: performing weak stirring for 6 minutes and then continuous casting after completing LF refining.

[0020] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0021] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A smelting method for a low-cost galvanized patterned steel plate, wherein the mass percentage of the components of the low-cost galvanized patterned steel plate is: C 0.10-0.16, Si 0-0.08, Mn 0.15-0.25, P ≤0.020, S ≤0.010, Al 0.01-0.07, and the remainder is Fe and trace impurities; It is characterized in that The smelting method of the low-cost galvanized patterned steel plate comprises: Converter smelting: add scrap steel and molten iron appropriately according to the furnace volume ratio; the C content at the converter blowing end point is less than 0.16%, and the P content is less than 0.020%; during the steel tapping process, add silicon manganese and aluminum particles (shots) for deoxidation, and then alloy the manganese carbon alloy according to the manganese alloy 100% yield plus the residual manganese content at the converter end point plus the silicon manganese added manganese as the lower limit of the manganese content in the composition; LF refining: deep desulfurization is first performed before LF refining to ensure that sulfur is ≤0.010%, and the temperature is adjusted at the same time; then fine-tuning of C, Al, and Mn components is performed; then silicon-calcium wire is fed at 1.5 m / t; after the silicon-calcium wire is fed, weak argon stirring is performed for ≥5 minutes; Continuous casting.

2. The smelting method of low-cost galvanized patterned steel plate according to claim 1, characterized in that: The converter smelting method further comprises: sampling and analyzing the converter endpoint components (mass percentage) after steel tapping: C: 0.097, Si 0.012, Mn 0.144, P 0.0035, S 0.0147, Al 0.

008.

3. The smelting method of low-cost galvanized patterned steel sheet according to claim 2, characterized in that: The LF refining method also includes: LF endpoint composition (mass percentage): C: 0.111, Si 0.055, Mn 0.179, P 0.004, S 0.003, Al 0.

026.

4. The smelting method of low-cost galvanized patterned steel plate according to claim 3, characterized in that: The smelting method of the low-cost galvanized patterned steel plate also includes: After the LF refining was completed, weak stirring was performed for 6 minutes and then continuous casting was performed.