A method for producing non-oriented high silicon steel by cold rolling
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A technology of continuous cold rolling and high-silicon steel, which is applied in the field of metallurgy, can solve problems such as production process capacity constraints, and achieve the effect of improving capacity and continuous rolling capacity
Active Publication Date: 2022-05-20
ANGANG STEEL CO LTD
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[0003] At present, only a few large iron and steel complexes at home and abroad have high-grade silicon steel production technology and process equipment, and the capacity of traditional production processes is limited.
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Embodiment 1
[0040] The method of producing non-oriented high-silicon steel by cold continuous rolling method, the steel chemical composition C: 0.0025%, Si: 2.61%, Als: 0.48%, Mn: 0.28%, O: 0.0056%, P: 0.010%, S: 0.0012% , N: 0.0017%, Ti: 0.0020%, V: 0.0015%, Nb: 0.0013%, B: 0.0045%, Sn: 0.065%, the rest is Fe and unavoidable residual elements; process route: hot metal desulfurization-converter smelting- RH refining - continuous casting - hot rolling - normalization - pickling - cold rolling - continuous furnace annealing - coating - performance inspection - packaging, the specific steps include:
[0041] 1) After RH vacuum decarburization treatment, aluminum deoxidation and partial aluminum alloying, 1 / 3 of the estimated amount of aluminum alloy is added; then the whole silicon steel is alloyed, boron alloying is added, the remaining aluminum alloy is added, and tin alloying is added;
[0042] 2) After alloying, the molten steel in the large tank is circulated for 6 minutes; the standing...
Embodiment 2
[0048] The method of producing non-oriented high-silicon steel by cold continuous rolling method, the steel chemical composition C: 0.0022%, Si: 2.88%, Als: 0.55%, Mn: 0.31%, O: 0.0060%, P: 0.011%, S: 0.0017% , N: 0.0019%, Ti: 0.0018%, V: 0.0014%, Nb: 0.0015%, B: 0.0049%, Sn: 0.105%, the rest is Fe and unavoidable residual elements; process route: hot metal desulfurization-converter smelting- RH refining - continuous casting - hot rolling - normalization - pickling - cold rolling - continuous furnace annealing - coating - performance inspection - packaging, the specific steps include:
[0049] After RH vacuum decarburization treatment, aluminum deoxidation and partial aluminum alloying, 1 / 3 of the calculated aluminum alloy content is added; then the whole silicon steel is alloyed, boron alloyed is added, the remaining aluminum alloy is added, other components are fine-tuned, and tin alloyed join in;
[0050] After alloying, the molten steel in the large tank is circulated 4 t...
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Abstract
The invention relates to a method for producing non-oriented high-silicon steel by cold tandem rolling. After RH vacuum decarburization treatment, aluminum deoxidation and partial aluminum alloying, the net circulation of molten steel in a large tank after alloying is more than 3 times or more than 5 minutes; the smelting is qualified The molten steel should be left to stand for more than 20 minutes before continuous casting; the superheating degree should be controlled at 5-15°C; electromagnetic stirring should be used to control the proportion of equiaxed crystals to more than 45%; 3) the furnace temperature of the slab in the hot rolling process should be greater than 750°C; Normalize to make the grain size within the range of 90-110μm; set the temperature in the heating section of the continuous annealing furnace to 950-1150°C, set the temperature in the soaking section to 900-1050°C, and protect the grain size with nitrogen dry atmosphere to control the grain size to 120-170μm . The thermal history parameter control in the whole production process can give full play to the function of the designed micro-alloying elements and change the composition, size, shape and distribution of precipitates.
Description
technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing non-oriented high-silicon steel by cold continuous rolling. Background technique [0002] Non-oriented high-grade silicon steel series products are important functional soft magnetic materials. With the advancement of technology and the development of downstream industries, the demand is extensive, and it is gradually shifting from the field of large and medium-sized industrial motors and generators to high-efficiency motors, high-efficiency compressors, and new energy motors. development in other fields. [0003] At present, only a few large-scale iron and steel complexes at home and abroad have high-grade silicon steel production technology and process equipment, and the traditional production process capacity is limited. Now, with the progress of metallurgical technology and the improvement of process equipment capabilities, high-grade silicon steel has basica...
Claims
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