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A process for producing thin-gauge medium-carbon steel
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A process method and thin-gauge technology, applied in the field of producing thin-gauge medium carbon steel, can solve the problems of increased production cost and cumbersome smelting process.
Active Publication Date: 2018-07-31
武汉钢铁有限公司
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[0005] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a process method for producing thin-gauge medium-carbon steel, which is used to solve the cumbersome smelting process in the production of medium-carbon steel in the prior art, resulting in increased production costs. question
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Embodiment 1
[0061] In practical applications, when using the process method provided in Example 1 to prepare thin-gauge medium carbon steel, the specific implementation is as follows:
[0062] Firstly, the molten iron is desulfurized, and the desulfurized molten iron is sent to the converter for blowing, and the blown molten iron is blown with argon. The molten iron after argon blowing is refined to obtain molten steel after alloying treatment.
[0063] The mass percentages of the chemical components of molten steel after alloying treatment in this embodiment include: C: 0.30%, Si: 0.32%, Mn: 0.64%, Als: 0.015%, P: 0.011%, S: 0.004%, N: 0.005%, the rest is Fe and impurities.
[0064] Then, the molten steel is smelted to obtain a continuous casting slab, and the thickness of the continuous casting slab is 50 mm. Because the thickness of the continuous casting slab is only 50mm, the rough rolling process of hot continuous rolling in the traditional process can be omitted to produce hot-ro...
Embodiment 2
[0084] In practical applications, when using the process method provided in Example 1 to prepare thin-gauge medium carbon steel, the specific implementation is as follows:
[0085] Firstly, the molten iron is desulfurized, and the desulfurized molten iron is sent to the converter for blowing, and the blown molten iron is blown with argon. The molten iron after argon blowing is refined to obtain molten steel after alloying treatment.
[0086] The mass percentages of the chemical components of molten steel after alloying treatment in this embodiment include: C: 0.43%, Si: 0.28%, Mn: 0.84%, Als: 0.021%, P: 0.009%, S: 0.003%, N: 0.007%, the rest is Fe and impurities.
[0087] Then, the molten steel is smelted to obtain a continuous casting slab, and the thickness of the continuous casting slab is 56 mm. Because the thickness of the continuous casting slab is only 56mm, the rough rolling process of hot continuous rolling in the traditional process can be omitted to produce hot-roll...
Embodiment 3
[0108] In practical applications, when using the process method provided in Example 1 to prepare thin-gauge medium carbon steel, the specific implementation is as follows:
[0109] Firstly, the molten iron is desulfurized, and the desulfurized molten iron is sent to the converter for blowing, and the blown molten iron is blown with argon. The molten iron after argon blowing is refined to obtain molten steel after alloying treatment.
[0110] The mass percentages of the chemical components of molten steel after alloying treatment in this embodiment include: C: 0.49%, Si: 0.23%, Mn: 1.57%, Als: 0.021%, Cr: 0.21, V: 0.11, P: 0.011%, S: 0.003%, N: 0.005%, and the rest are Fe and impurities.
[0111] Then, the molten steel is smelted to obtain a continuous casting slab, and the thickness of the continuous casting slab is 59 mm. Because the thickness of the continuous casting slab is only 59mm, the rough rolling process of hot continuous rolling in the traditional process can be o...
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Abstract
The invention provides a technological method for producing thin gauge medium carbon steel. The technological method comprises the following steps: performing desulfuration on molten iron, feeding molten iron after desulfuration into a converter for converting, and performing argon blowing on the molten iron after converting; performing refining on the molten iron after argon blowing to obtain molten steel after being subjected to alloying treatment; performing smelting on the molten iron to obtain continuous casting slabs, wherein the thickness of the continuous casting slabs is 50-70 mm; heating the continuous casting slabs, controlling the charging temperature of the continuous casting slabs to be 950-1050 DEG C and the tapping temperature to be 1182-1231 DEG C; performing seven-pass finish rolling on the continuous casting slabs, controlling the reduction rate in the first and second passes to be 45-60%, controlling the finish rolling temperature to be 859-881 DEG C, and performing finish rolling to obtain hot rolled plates; performing primary warm rolling on the hot rolled plates, controlling the rolling temperature to be 351-550 DEG C during the three-pass rolling processes of the primary warm rolling, and controlling the reduction rate in each cold rolling pass to be 30-40%; performing secondary warm rolling on the hot rolled plates after being subjected to primary warm rolling, controlling the rolling temperature to be 152-237 DEG C during the three-pass rolling processes of the secondary warm rolling, and controlling the reduction rate in each cold rolling pass to be 8-15%; and performing annealing on the hot rolled plates after being subjected to secondary warm rolling to obtain finished steel plates.
Description
technical field [0001] The invention relates to the technical field of steelmaking, in particular to a process for producing thin-gauge medium-carbon steel. Background technique [0002] Medium carbon steel has the characteristics of high strength, high hardness and high wear resistance. It is mainly used to make various cutting knives and special tools. It is widely used in papermaking, forestry, rubber, plastics, textiles, electrical appliances, light industrial machinery and other fields. . [0003] At present, the production process of most medium carbon steel sheets is: molten iron → converter → LF refining → continuous casting → cooling → heating → rolling → laminar cooling → coiling → hot rolling → pickling → intermediate annealing → cold rolling → Intermediate annealing→cold rolling→spheroidizing annealing→cold rolled finished product. In the manufacturing method of the above-mentioned medium carbon steel, after the hot rolling, multiple annealing and multiple cold...
Claims
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