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Preparation method of low-process-temperature deep-drawing cold-rolled steel sheet
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A cold-rolled steel plate and deep-drawing technology, which is applied in the field of preparation of low-process temperature deep-drawn cold-rolled steel plate, can solve the problems that cannot meet the needs of the automobile and home appliance industries, and the mechanical properties of the steel plate do not meet market requirements.
Inactive Publication Date: 2021-01-15
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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Problems solved by technology
[0003] However, in the current production process of cold-rolled steel sheets, the mechanical properties of the prepared steel sheets still do not meet the market requirements, and cannot meet the needs of the automobile and home appliance industries.
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Embodiment 1
[0039] First, in step S101, the molten steel is smelted in the manner of desulfurization, converter smelting, LF furnace Ca treatment, and RH decarburization, and then the composition of the molten steel is controlled within the following range by weight percentage: C:≤0.0017%, Si: ≤0.002%, Mn: 0.05%, P: 0.009%, S: 0.008%, Ti: 0.064%, Als: 0.037%, and the balance is composed of Fe and unavoidable impurities. Then, the molten steel within the above range is connected to Cast into continuous casting slabs.
[0040]Next, in step S102, the billet is sent into a heating furnace for heating to prepare for rough rolling. The heating temperature of the heating furnace is 1170° C., and the time in the furnace is controlled at 220 minutes.
[0041] Subsequently, in step 103, rough rolling is performed on the heated steel slab, and the thickness of the obtained rough rolled slab is controlled at 39 mm after the rough rolling process. Rough rolling can be carried out in five passes, and ...
Embodiment 2
[0045] First, in step S101, the molten steel is smelted in the manner of desulfurization, converter smelting, LF furnace Ca treatment, and RH decarburization, and then the composition of the molten steel is controlled within the following range by weight percentage: C:≤0.0019%, Si: ≤0.003%, Mn: 0.08%, P: 0.008%, S: 0.010%, Ti: 0.063%, Als: 0.035%, and the balance is composed of Fe and unavoidable impurities. Then, the molten steel within the above range is connected to Cast into continuous casting slabs.
[0046] Next, in step S102, the steel billet is sent into a heating furnace for heating to prepare for rough rolling. The heating temperature of the heating furnace is 1170° C., and the time in the furnace is controlled at 260 minutes.
[0047] Subsequently, in step 103, rough rolling is performed on the heated steel slab, and the thickness of the obtained rough rolled slab is controlled at 44mm after the rough rolling process. Rough rolling can be carried out in five passes...
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Abstract
According to the preparation method, the preparation method of the low-process-temperature deep-drawing cold-rolled steel sheet comprises the following steps: 1, molten steel is continuously cast intoa continuous casting billet; 2, the continuous casting billet is fed into a heating furnace for heating; 3, roughly rolling is carried out on the heated continuous casting billet to obtain a roughlyrolled plate blank; 4, the rough rolling plate blank is subjected to finish rolling and rolled into a steel strip coil; and 5, the steel strip coil is uncoiled and cold-rolled to obtain a cold-rolledplate, the cold-rolled plate is annealed to obtain the low-process-temperature deep-drawing cold-rolled steel sheet, annealing treatment sequentially comprises a soaking section, a slow cooling section, a rapid cooling section and an overaging section, the temperature of the soaking section is 710-740 DEG C, the temperature of the slow cooling section is 670-700 DEG C, the temperature of the rapidcooling section is 430-450 DEG C, and the temperature of the overaging section is 400-430 DEG C.
Description
technical field [0001] The present invention generally relates to the production field of cold-rolled steel sheets, and more specifically, relates to a method for preparing low-process-temperature deep-drawn cold-rolled steel sheets. Background technique [0002] Cold-rolled steel sheets refer to steel sheets formed by rolling below the recrystallization temperature of steel. Compared with hot-rolled steel sheets, their surfaces are smoother and are widely used in the fields of automobiles and home appliances. At present, with the continuous development of the automobile and home appliance industries, the market's requirements for steel plates continue to increase. On the premise of ensuring quality, the stamping performance is gradually improved. [0003] However, in the current production process of cold-rolled steel sheets, there are still problems that the mechanical properties of the prepared steel sheets do not meet market requirements, and cannot meet the needs of the...
Claims
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