A cold-rolled hot-dip galvanized steel sheet with excellent bending properties and a manufacturing method thereof
A manufacturing method and hot-dip aluminum technology are applied to cold-rolled hot-dip aluminum-zinc steel sheets, hot-dip aluminum-zinc steel sheets, cold-rolled hot-dip aluminum-zinc steel sheets and their manufacturing fields, and can solve the bending of cold-rolled hot-dip aluminum-zinc steel sheets. The problems of poor performance and high manufacturing cost can achieve the effect of low switching difficulty, low implementation investment, and stable production.
Active Publication Date: 2022-07-15
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
[0008] The purpose of the present invention is to provide a cold-rolled hot-dip galvanized steel sheet with excellent bending performance and its manufacturing method, which mainly solves the problems in the prior art with a thickness of 1.0-1.2mm and a single-side zinc layer weight of 45-55g / m 2 The technical problems of poor bending performance and high manufacturing cost of cold-rolled hot-dip galvalume steel sheet meet the needs of the home appliance industry for complex forming and processing of cold-rolled hot-dip galvanized steel sheet
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Embodiment Construction
[0048] The present invention will be further described below in conjunction with Embodiments 1 to 6. .
[0049] Table 1 is the chemical composition (by weight percent) of the cold-rolled hard steel sheet of the embodiment of the present invention, and the balance is Fe and inevitable impurities.
[0050] The chemical composition of table 1 embodiment steel of the present invention, unit: weight percentage
[0051]
[0052]
[0053] Through converter smelting, continuous casting slabs meeting the required chemical composition are obtained, with a thickness of 210 to 240 mm, a width of 800 to 1300 mm, and a length of 5000 to 10000 mm.
[0054] The continuous casting slab is heated to 1150-1200 ℃ by a heating furnace and then hot rolled. The hot rolling is a two-stage rolling process. The rough rolling is 5-pass continuous rolling, and the finishing rolling is 7-pass continuous rolling. The temperature at the end of rolling is 900°C to 920°C; the laminar cooling adopts po...
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Abstract
The invention relates to a cold-rolled hot-dip galvanized steel sheet with excellent bending performance and a manufacturing method thereof, and mainly solves the problem that the thickness of the prior art is 1.0-1.2 mm and the weight of the single-sided zinc layer is 45-55 g / m 2 The technical problems of poor bending performance and high manufacturing cost of cold-rolled hot-dip galvanized steel sheet. The invention provides a cold-rolled hot-dip galvanized steel sheet with excellent bending performance and a manufacturing method thereof. The chemical composition weight percentages of the substrate are: C: 0.0010-0.0020%, Si: 0-0.034%, Mn: 0.05- 0.15%, P≤0.02%, S≤0.015%, Alt: 0.015~0.05%, Ti: 0.02%~0.025%, the balance is Fe and inevitable impurity elements; After 45°, reverse bending is performed for 180°, d=0a is qualified, and no zinc layer of the hot-dip galvanized steel sheet falls off.
Description
technical field [0001] The invention relates to a cold-rolled hot-dip galvanized steel sheet, in particular to a cold-rolled hot-dip galvanized steel sheet with excellent bending performance and a manufacturing method thereof, in particular to a single-sided zinc layer with a thickness of 1.0-1.2 mm. Weight is 45-55g / m 2 The hot-dip aluminum-zinc steel sheet belongs to the technical field of iron-based alloys. Background technique [0002] Home appliance steel generally uses cold-rolled hot-dip galvanized steel sheet or cold-rolled hot-dip galvanized steel sheet. The actual use results show that the corrosion resistance of cold-rolled hot-dip galvanized steel sheet is 2-6% of that of cold-rolled hot-dip galvanized steel sheet under the same conditions. In order to meet the requirements of high corrosion resistance, cold-rolled hot-dip galvanized products are gradually replaced by cold-rolled hot-dip galvanized products. [0003] Generally, household appliance steel has com...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D8/02C21D1/26C23C2/06C23C2/40
CPCC22C38/004C22C38/02C22C38/04C22C38/002C22C38/06C22C38/14C21D8/0226C21D8/0236C21D8/0273C21D1/26C23C2/06C23C2/40C21D2211/005C21D2211/004
Inventor 丁志龙魏宝民闫秉昊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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