Production method for high-frequency thin-ribbon silicon steel
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A production method and thin strip technology, applied in the field of steel rolling, can solve the problems of long production cycle, deterioration of cold workability, increased difficulty in production control, etc., and achieve the effect of improving work efficiency, avoiding the increase of cold brittleness, and having favorable effects of isotropy of finished products.
Inactive Publication Date: 2018-12-25
ANGANG STEEL CO LTD
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Correspondingly, the difficulty of production control is increased, the production cycle is long, the cold workability is deteriorated, the rolling recovery rate is low, and the cost is greatly increased
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Embodiment 1
[0027] The mass percentage content of the main alloy (silicon + manganese + aluminum) is 3.81%, of which 2.95% Si, 0.53% Al, 0.33% Mn;
[0028] After refining and decarburization, use silicon deoxidation, carry out silicon alloying, and then carry out aluminum alloying; composition control: S: 0.0085%, N: 0.0050%, (Ni+V+Ti): 0.022%; continuous casting superheat 25 ℃, casting speed 0.5m / min, columnar crystal ratio 56%; furnace temperature for hot rolling: 450℃, heating temperature 1100℃, heating time 220 minutes.
Embodiment 2
[0030] The mass percentage content of the main alloy (silicon + manganese + aluminum) is 4.01%, of which 2.75% Si, 0.83% Al, 0.43% Mn;
[0031] After refining and decarburization, use silicon deoxidation, carry out silicon alloying, and then carry out aluminum alloying; composition control: S: 0.0105%, N: 0.0035%, (Ni+V+Ti): 0.025%; continuous casting superheat 20 ℃, casting speed 0.9m / min, columnar crystal ratio 67%; furnace temperature for hot rolling: 390℃, heating temperature 1150℃, heating time 190 minutes.
Embodiment 3
[0033] The mass percentage content of the main alloy (silicon + manganese + aluminum) is 4.70%, of which 3.32% Si, 1.13% Al, 0.25% Mn;
[0034] After refining and decarburization, use silicon deoxidation, carry out silicon alloying, and then carry out aluminum alloying; composition control: S: 0.0010%, N: 0.0045%, (Ni+V+Ti): 0.018%; continuous casting superheat 30 ℃, casting speed 0.6m / min, columnar crystal ratio 75%; furnace temperature for hot rolling: 490℃, heating temperature 1120℃, heating time 210 minutes.
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Abstract
The invention provides a production method for high-frequency thin-ribbon silicon steel. The production method is applicable to cold rolled non-oriented silicon steel of which the content of a main body alloy of silicon, manganese and aluminum is greater than 2.5%, and comprises the following steps: 1) carrying out refining decarbonization, silicon deoxidation, silicon alloying and aluminum alloying; 2) controlling contents of harmful elements, namely controlling that the content of sulfur is less than or equal to 0.020%, the content of nitrogen is less than or equal to 0.0100%, and the overall content of niobium, vanadium and titanium is less than or equal to 0.025%; 3) controlling a superheat degree for 15-50 DEG C and a pull speed within 0.3-1.2m/min in a continuous casting process, andcontrolling that the ratio of columnar crystal of a cast blank is greater than or equal to 50%; 4) controlling a feeding temperature greater than or equal to 300 DEG C for cast blank hot rolling, andheating with a neutral or reductive atmosphere, wherein the heating temperature is less than or equal to 1200 DEG C, and the heating control is controlled within 180-240 minutes. A finished product thinning effect and an effect of reducing eddy-current loss of high-frequency magnetization are achieved. Production control difficulties of overall procedures are reduced, and technical difficulties of higher alloy contents and thinner products are also avoided.
Description
technical field [0001] The invention relates to the technical field of steel rolling, in particular to a production method of high-frequency thin-strip silicon steel. Background technique [0002] Electrical steel products are widely used metal functional soft magnetic materials, mainly used in the field of iron core manufacturing of various motors and electrical appliances. With the development of new energy technology and the wide application of frequency conversion technology, high-frequency variable frequency high-efficiency motors have gradually become mainstream products, which put forward higher requirements for the electromagnetic properties of electrical steel. On the one hand, it is required to reach the conventional electromagnetic performance level in the low-frequency working range, and the products in the medium-high frequency working range have high-frequency and low-loss characteristics, which brings relatively contradictory performance index requirements for...
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