Method for producing non-oriented high silicon steel by cold continuous rolling method
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A technology for continuous cold rolling and high silicon steel, applied in the metallurgical field, can solve problems such as limited production capacity in the production process, and achieve the effect of improving capacity and continuous rolling capacity.
Active Publication Date: 2021-12-14
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
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[0039] Example 1
[0040] Cold and Rolling Method Non-tight Method, C: 0.0025%, Si: 2.61%, ALS: 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 inevitable residual elements; process routes: iron water desulfurization - converter smelting - RH Refining - Continuous Cast - Hot Rolled - Anti-Acid - Acid Wash - Cold - Continuous Furnace Annealing - Coating - Performance Test - Packaging, specific steps include:
[0041] 1) After RH vacuum decarburization, aluminum deoxidation and partial aluminum alloy, mean 1 / 3 of the aluminum alloy; subsequently silicon steel alloying, boron is added, and the residual aluminum alloy is added, tin alloy is added;
[0042] 2) After the alloying, the large cansh water is net cycles for 6 minutes; standing for 22 minutes before the casting; controls the overheating 12 ° C; use electromagnetic stirring, control and other axial crystal ratio; 50%;
[0043] 3) Hot rolling...
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[0047] Example 2
[0048] The method of cold rolling a high production of non-oriented silicon steel, 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 remainder being Fe and unavoidable residual elements; the process route: desulphurization - smelting - RH refining - continuous casting - hot rolling - normalization - pickling - cold rolling - continuous annealing furnace - coating - performance test - packaging, specific steps comprising:
[0049] RH vacuum treatment after decarburization, deoxidation and the aluminum alloy part of, measure the amount of aluminum added to 1 / 3; followed by a whole silicon alloy, alloyed boron is added, the remaining aluminum was added complement, to fine-tune other components, a tin alloy join in;
[0050] After alloying, molten steel net large cans 4 cycles; standing time before pouring opening 25 minutes; super...
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Abstract
The invention relates to a method for producing non-oriented high silicon steel by a cold continuous rolling method. The method comprises the following steps: after RH vacuum decarburization treatment, aluminum deoxidizing and partial aluminum alloying are carried out, and after alloying, net circulation is carried out on molten steel in a large tank for more than 3 times or more than 5 minutes; the standing time from smelting of qualified molten steel to continuous casting starting is longer than 20 minutes; the superheat degree is controlled to be 5-15 DEG C; electromagnetic stirring is adopted, and the proportion of equiaxed crystals is controlled to be 45% or above; 3) the charging temperature of a plate blank in the hot rolling process is higher than 750 DEG C; normalizing is carried out to enable the grain size to be in a range of 90-110 microns; and the temperature of a heating section of a continuous annealing furnace is set to be 950-1150 DEG C, the temperature of a soaking section is set to be 900-1050 DEG C, full-nitrogen dry atmosphere protection is adopted, and the grain size is controlled to be 120-170 microns. The thermo-history parameter control in the whole production process gives full play to the functions of designed microalloy elements, and changes the composition, size, form 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...
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