公开(公告)号：US20130224064A1

公开(公告)日：2013-08-29

申请号：US13823311

申请日：2011-04-14

Applicant: Feng Zhang ,  Xiao Chen ,  Wei Cao ,  Yezhong Sun ,  Changsong Ma ,  Jianru Zhu ,  Zhuolei Chen ,  Xiandong Liu

Inventor： Feng Zhang ,  Xiao Chen ,  Wei Cao ,  Yezhong Sun ,  Changsong Ma ,  Jianru Zhu ,  Zhuolei Chen ,  Xiandong Liu

IPC: B22D25/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04

CPC classification number: B22D25/00 ,  B22D11/182 ,  B22D11/225 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1205 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C21D8/1277 ,  C21D2201/05 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/16

Abstract: A non-oriented electrical steel sheet without corrugated defect and a manufacturing method thereof is provided, the weight percentage of the chemical composition of the non-oriented electrical steel sheet is that C is no more than 0.005%, Si is 1.2-2.2%, Mn is 0.2-0.4%, P is no more than 0.2%, S is no more than 0.005%, Al is 0.2-0.6%, N is no more than 0.005%, O is no more than 0.005%, and a balance substantially being Fe, a slab can be obtained by hot metal preprocessing, smelting with converter, RH refining, and continuous casting and pouring, wherein a secondary cooling water amount is controlled, the water flowrate of cooling water is controlled to 100-190 l/min, the average superheat of liquid steel in the continuous casting process is controlled to 10-45° C., the slab is heated and hot rolled; wherein the furnace tap temperature of the slab is 1050-1150 ° C., the temperature difference between random two points in the length direction when the slab is heated, is lower than 25° C., the hot rolling process includes a rough rolling process and a planishing process, the entry temperature in the planishing process is no lower than 970° C.; the finished non-oriented electrical steel sheet is obtained by acid pickling, cold rolling, annealing and coating. No corrugated defect can be accomplished by controlling the cooling speed of the slab in continuous casting and pouring process, the temperature difference in the length direction of the slab in the heating furnace, and by controlling the temperature drop before planishing the slab.

Abstract translation: 本发明提供一种无波纹状缺陷的无取向电工钢板及其制造方法，其中，所述无方向性电工钢板的化学成分的重量百分比为C为0.005％以下，Si为1.2〜2.2％ Mn为0.2〜0.4％，P为0.2％以下，S为0.005％以下，Al为0.2〜0.6％，N为0.005％以下，O为0.005以下，余量基本上为 是Fe，可以通过热金属预处理，转炉熔炼，RH精炼以及连续铸造和浇注获得板坯，其中控制二次冷却水量，将冷却水的水流量控制在100-190l / min ，连铸过程中液态钢的平均过热度控制在10-45℃，将板坯加热和热轧; 其特征在于，板坯的炉膛温度为1050〜1150℃，板坯加热时长度方向随机两点之间的温差低于25℃，热轧工序包括粗轧工序 和平整过程中，平整过程中的入口温度不低于970℃; 通过酸洗，冷轧，退火和涂布获得成品的无取向电工钢板。 通过在连续铸造和浇注过程中控制板坯的冷却速度，加热炉中板坯的长度方向的温差，以及通过控制板坯平整之前的温度下降来控制温度下降，可以不产生瓦楞缺陷。

公开(公告)号：US09496078B2

公开(公告)日：2016-11-15

申请号：US14372689

申请日：2012-03-29

Applicant: Huawei Zhang ,  Yaping Wu ,  Yu Gong ,  Yezhong Sun ,  Hongxu Hei

Inventor： Huawei Zhang ,  Yaping Wu ,  Yu Gong ,  Yezhong Sun ,  Hongxu Hei

IPC: C21D6/00 ,  H01F1/147 ,  C21D8/12 ,  C21D1/26 ,  C22C38/02 ,  H01F41/00 ,  C21D8/02 ,  C21D8/04 ,  C21D9/00 ,  C21D9/70

CPC classification number: H01F1/14766 ,  C21D1/26 ,  C21D6/00 ,  C21D6/008 ,  C21D8/021 ,  C21D8/041 ,  C21D8/1205 ,  C21D8/1216 ,  C21D8/1244 ,  C21D9/0081 ,  C21D9/70 ,  C21D2201/05 ,  C22C38/02 ,  H01F41/00

Abstract: A hot rolled silicon steel producing method comprises: silicon steel slab heating process, rough rolling process and finish rolling process. The heating process comprises a pre-heating stage, a heating stage and a soaking stage. The pre-heating stage satisfies the following formula (1). In the formula, VTp is a temperature increasing rate, in the pre-heating stage, whose unit is ° C./min; t is a total heating time of the slab in the heating furnace, and t=180-240 min; and Tc is an initial temperature when the slab is put into the furnace, whose unit is ° C. By using the foregoing formula, the heating process and the rough rolling process are changed, an occurrence rate of edge defects during the production of the hot rolled silicon steel can be reduced, and the hot rolled silicon steel with good surface quality can be produced. V Tp > 220 ⁢ ⁢ min t × 100 ⁢ ° ⁢ ⁢ C . T C + 200 ⁢ ° ⁢ ⁢ C . × 25 ⁢ ° ⁢ ⁢ C . / ⁢ min ( 1 )

公开(公告)号：US20150243418A1

公开(公告)日：2015-08-27

申请号：US14372689

申请日：2012-03-29

Applicant: Huawei Zhang ,  Yaping Wu ,  Yu Gong ,  Yezhong Sun ,  Hongxu Hei

Inventor： Huawei Zhang ,  Yaping Wu ,  Yu Gong ,  Yezhong Sun ,  Hongxu Hei

IPC: H01F1/147 ,  H01F41/00 ,  C22C38/02 ,  C21D8/12 ,  C21D6/00

CPC classification number: H01F1/14766 ,  C21D1/26 ,  C21D6/00 ,  C21D6/008 ,  C21D8/021 ,  C21D8/041 ,  C21D8/1205 ,  C21D8/1216 ,  C21D8/1244 ,  C21D9/0081 ,  C21D9/70 ,  C21D2201/05 ,  C22C38/02 ,  H01F41/00

Abstract: A hot rolled silicon steel producing method comprises: silicon steel slab heating process, rough rolling process and finish rolling process. The heating process comprises a pre-heating stage, a heating stage and a soaking stage. The pre-heating stage satisfies the following formula (1). In the formula, VTp is a temperature increasing rate, in the pre-heating stage, whose unit is ° C./min; t is a total heating time of the slab in the heating furnace, and t=180-240 min; and Tc is an initial temperature when the slab is put into the furnace, whose unit is ° C. By using the foregoing formula, the heating process and the rough rolling process are changed, an occurrence rate of edge defects during the production of the hot rolled silicon steel can be reduced, and the hot rolled silicon steel with good surface quality can be produced. V Tp > 220   min t × 100  °   C . T C + 200  °   C . × 25  °   C . /  min ( 1 )

Abstract translation: 热轧硅钢的制造方法包括：硅钢板坯加热工序，粗轧加工和精轧工序。 加热过程包括预热阶段，加热阶段和均热阶段。 预热阶段满足下式（1）。 在公式中，VTp是预热阶段的升温速率，单位为℃/ min; t是加热炉中板坯的总加热时间，t = 180-240分钟; Tc是板坯放入炉内时的初始温度，单位为℃。通过上述公式，加热处理和粗轧过程发生变化，生产热边缘边缘缺陷的发生率 可以减少轧制硅钢，并且可以生产具有良好表面质量的热轧硅钢。 V Tp> 220ㄧt××× T C + 200°C。 ×25°C。 /分钟（1）