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Применить Всего найдено 6. Отображено 6.
24-06-2015 дата публикации

Normalizing method for enhancing yield of common oriented silicon steel

Номер: CN104726651A
Автор: JIANG QIWU, FU YONGJUN, JIN WENXU, YOU QINGLEI, ZHANG JING, ZHANG HAILI, JIA ZHIWEI, PANG SHUFANG, SU HAOLU, WANG XIAODA, LI LI, LI XUEYAN
Принадлежит:

The invention discloses a normalizing method for enhancing yield of common oriented silicon steel, which comprises the following steps: 1) primary water quenching: uniformly spraying 20-80-DEG C water on the upper and lower surfaces of a 900-950-DEG C steel plate, wherein the water quenching time is controlled at 20-30 seconds; 2) tempering treatment: heating the steel plate to 400-600 DEG C, and keeping the temperature in an air atmosphere for 20-35 seconds; and 3) secondary water quenching: uniformly spraying 20-40-DEG C water on the upper and lower surfaces of the steel plate, wherein the water quenching time is controlled at 5-20 seconds. The method is convenient to operate and easy to implement, and can effectively decompose the hard brittle martensitic structure in the normalized plate, thereby obviously lowering the rolling breaking rate and enhancing the yield; and the final magnetic properties are not greatly changed.

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Номер записи: 1
24-06-2015 дата публикации

Method for manufacturing high magnetic induction grain-oriented silicon steel through short-process medium and thin slab

Номер: CN104726670A
Автор: JIANG QIWU, YOU QINGLEI, JIN WENXU, ZHANG HAILI, FU YONGJUN, ZHANG JING, PANG SHUFANG, JIA ZHIWEI, WANG XIAODA, SU HAOLU, LI LI, LI XUEYAN
Принадлежит:

The invention discloses a method for manufacturing high magnetic induction grain-oriented silicon steel through a short-process medium and thin slab. The method comprises hot metal pretreatment, smelting, LF furnace external refining, medium and thin slab continuous casting and rolling, normalizing acid pickling, cold rolling, decarburizing annealing and MgO coating, high-temperature annealing, hot stretching leveling and insulation layer coating and rewinding packaging. The steel comprises the following components according to the weight percent ratio: 0.01 to 0.1 of C, 2.5 to 3.5 of Si, 0.05 to 0.20 of Mn, 0.005 to 0.02 of P, 0.005 to 0.03 of S, 0.005 to 0.02 of Als, 0.006 to 0.10 of N, the balanced of Fe and inevitable impurities. The process overall finished product yield after hot rolling is improved by more than 5 percent, magnetic induction B8 is improved to be more than 1.88T, and the iron loss P1.7 is reduced to below 1.20W/kg.

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Номер записи: 2
24-06-2015 дата публикации

Method for effectively producing high magnetic induction grain-oriented silicon steel

Номер: CN104726668A
Автор: JIANG QIWU, ZHANG HAILI, JIN WENXU, YOU QINGLEI, FU YONGJUN, ZHANG JING, JIA ZHIWEI, PANG SHUFANG, WANG XIAODA, SU HAOLU, LI LI, LI XUEYAN
Принадлежит:

The invention discloses a method for effectively producing high magnetic induction grain-oriented silicon steel. The method comprises the processes of smelting, continuous casting, hot rolling, normalizing, acid pickling, cold rolling, decarburization annealing and MgO coating, high-temperature annealing, insulating coating and hot stretch temper rolling annealing. When superheat degree of molten steel is less than 30 DEG C, pouring is carried out, and plate blanks are heated to 1,100-1,150 DEG C in a heating furnace, a rough rolling mode is 3+1; during the finish rolling, the primary rolling temperature is 1,000-1,050 DEG C and the final rolling temperature is 850-900 DEG C; in the normalizing process, the cooling is controlled section by section; in the cold rolling process, the pass reduction percentage is controlled to be 30-40 percent; in the decarburization annealing process, a two-section type decarburization annealing is adopted; and in the high-temperature annealing process, a ...

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Номер записи: 3
24-06-2015 дата публикации

Preparation method of low-iron-loss medium-frequency oriented silicon steel ultrathin belt

Номер: CN104726669A
Автор: JIANG QIWU, JIN WENXU, ZHANG JING, FU YONGJUN, YOU QINGLEI, ZHANG HAILI, WANG XIAODA, JIA ZHIWEI, LI XUEYAN, PANG SHUFANG, SU HAOLU, LI LI
Принадлежит:

The invention discloses a preparation method of a low-iron-loss medium-frequency oriented silicon steel ultrathin belt, which comprises the following steps: cold rolling: by using finished oriented silicon steel with the thickness of 0.15-0.35mm as the raw material, carrying out cold rolling on the raw material subjected to acid washing until the thickness is 0.03-0.10mm, wherein the total reduction rate is not less than 60%; cover annealing: heating to 600-700 DEG C in a pure N2 atmosphere within 1-3 hours; keeping the temperature in a nitrogen-hydrogen gas mixture protective atmosphere with the H2 volume percent of 50% above to discharge water in the barrier coating, and keeping the temperature until the dew point drops to 0 DEG C below, and continuing heating; and in the subsequent heating period, heating at the rate of 10-200 DEG C/hour to 850-1120 DEG C in a pure hydrogen atmosphere, keeping the temperature in the pure H2 atmosphere for 2-30 hours, cooling the strip coil to 300 DEG ...

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Номер записи: 4
24-06-2015 дата публикации

Production method of medium thin slab continuous casting and continuous rolling low-temperature oriented silicon steel

Номер: CN104726667A
Автор: JIANG QIWU, JIN WENXU, LI LI, FU YONGJUN, YOU QINGLEI, ZHANG JING, ZHANG HAILI, PANG SHUFANG, WANG XIAODA, SU HAOLU, JIA ZHIWEI, LI XUEYAN
Принадлежит:

The invention provides a production method of medium thin slab continuous casting and continuous rolling low-temperature oriented silicon steel. The production method comprises the steps of smelting, performing medium thin slab continuous casting and continuous rolling, normalizing, performing acid leaching, performing primary cold rolling, decarbonizing and annealing, performing secondary cold rolling, coating MgO, performing high-temperature annealing, and coating an insulation layer and performing heat stretching and smoothing, wherein smelting: chemical components after smelting are as follows in percentage by weight: 0.025%-0.10% of C, 2.5%-3.4% of Si, 0.03%-0.10% of Mn, not more than 0.030% of P, 0.01%-0.05% of S, 0.01%-0.03% of Als, 0.006%-0.015% of N and the balance of Fe and inevitable impurities; medium thin slab continuous casting and continuous rolling is adopted for low-temperature rolling under the component conditions; decarbonizing and annealing: heating is performed at ...

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Номер записи: 5
22-06-2011 дата публикации

Production method of energy saving type GO oriented silicon steel

Номер: CN0102102142A
Автор: ZHANG JING, JIN WENXU, JIANG QIWU, FU YONGJUN, YOU QINGLEI, ZHANG HAILI, PANG SHUFANG, WANG XIAODA, SU HAOLU, JING ZHANG, WENXU JIN, QIWU JIANG, YONGJUN FU, QINGLEI YOU, HAILI ZHANG, SHUFANG PANG, XIAODA WANG, HAOLU SU
Принадлежит:

The invention discloses a production method of energy saving type GO oriented silicon steel. The process of the invention is as follows: smelting, performing continuous casting, heating a plate blank, performing hot rolling, performing cold rolling, performing intermediate annealing, perform secondary cold rolling, coating annealing isolation agent, performing high-temperature annealing, coating a insulating stress coating, and performing hot-drawing, levelling and annealing to obtain the finished product. The production method comprises the following steps: heating the plate blank to 1250-1300 DEG C, controlling the intermediate decarburization annealing temperature to 750-900 DEG C and the decarburization time to 2-8min; controlling the carbon content of the steel plate to less than 27ppm; perform secondary cold rolling to ensure that the thickness of the finished product is 0.22-0.35mm; coating MgO isolation agent; then performing high-temperature annealing to form an oxidation film ...

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Номер записи: 6