公开(公告)号：US20130292005A1

公开(公告)日：2013-11-07

申请号：US13880278

申请日：2011-04-14

申请人： Zipeng Zhao ,  Yaming Ji ,  Yongjie Yang ,  Guobao Li ,  Dengfeng Li ,  Yunpeng Xu

发明人： Zipeng Zhao ,  Yaming Ji ,  Yongjie Yang ,  Guobao Li ,  Dengfeng Li ,  Yunpeng Xu

IPC分类号： C21D1/70

CPC分类号： C21D1/70 ,  C21D1/26 ,  C21D1/68 ,  C21D3/04 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/16

摘要： An annealing separator for manufacturing grain-oriented silicon steel with mirror-like surface having good magnetic performance consists of the composition of which is 77˜98 by wt % of Al2O3 powder, 1˜8 by wt % of alkaline earth powder, 1˜15 by wt % of alkali metal chloride and/or alkaline earth metal chloride. The annealing separator of the invention can avoid forming a glass-film undercoating on the surface of the steel sheet during high-temperature annealing, and at the same time, the oxide embedded at near-surface of the sheet is removed by means of corrosive reaction of the chloride, so that a produce with smooth surface and stable magnetic performance is obtained.

摘要翻译： 用于制造具有良好磁性能的镜面状的晶粒取向硅钢的退火分离剂组成为Al2O3粉末的77〜98重量％，碱土金属粉末1〜8重量％，碱土金属粉末1〜 的碱金属氯化物和/或碱土金属氯化物。 本发明的退火分离装置可以避免在高温退火时在钢板的表面上形成玻璃膜底涂层，同时通过腐蚀反应除去嵌入片材近表面的氧化物 的氯化物，从而获得具有光滑表面和稳定磁性能的产品。

公开(公告)号：US20110180187A1

公开(公告)日：2011-07-28

申请号：US13058073

申请日：2009-04-24

申请人： Yaming JI ,  Huande Sun ,  Guohua Yang ,  Yongjie Yang ,  Yunpeng Xu ,  Changguo Huang ,  Guobao Li

发明人： Yaming JI ,  Huande Sun ,  Guohua Yang ,  Yongjie Yang ,  Yunpeng Xu ,  Changguo Huang ,  Guobao Li

IPC分类号： C21D8/00 ,  B22D11/00

CPC分类号： C22C38/04 ,  C21D1/26 ,  C21D6/008 ,  C21D8/02 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1283 ,  C21D10/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/16

摘要： A method of manufacturing oriented Si steel containing Cu with high electric-magnetic property comprises: hot rolling slab; after first cold rolling, heating it to 800° C. or higher temperature and performing intermediate decarburization annealing in a protective atmosphere with PH2O/PH2 of 0.50˜0.88 for 3-8 minutes, to decrease carbon content of the steel plate to less than 30 ppm; then peening and acid-pickling to remove oxide of Fe on surface and to control oxygen content to lower than 500 ppm; secondary cold rolling to final thickness and coating separation agent in water-slurry form; drying to decrease water content to lower than 1.5%; high-temperature annealing in a protective atmosphere containing hydrogen with oxidation degree (PH2O/PH2) of 0.0001-0.2; finally applying a tension coating and leveling tension annealing.

摘要翻译： 含有具有高电磁性能的Cu的取向Si钢的方法包括：热轧板; 在第一次冷轧后，加热到800℃或更高的温度，并在保护气氛中进行中间脱碳退火，PH2O / PH2为0.50〜0.88，3-8分钟，将钢板的碳含量降低到30 ppm; 然后进行喷丸和酸洗以除去表面上的Fe的氧化物，并控制氧含量低于500ppm; 二次冷轧至最终厚度，涂层分离剂为水浆形式; 干燥以减少含水量低于1.5％; 在含氢氧化程度（PH2O / PH2）为0.0001-0.2的保护气氛中进行高温退火; 最后施加张力涂层和流平张力退火。

公开(公告)号：US08231739B2

公开(公告)日：2012-07-31

申请号：US13058073

申请日：2009-04-24

申请人： Yaming Ji ,  Huande Sun ,  Guohua Yang ,  Yongjie Yang ,  Yunpeng Xu ,  Changguo Huang ,  Guobao Li

发明人： Yaming Ji ,  Huande Sun ,  Guohua Yang ,  Yongjie Yang ,  Yunpeng Xu ,  Changguo Huang ,  Guobao Li

IPC分类号： H01F1/147

CPC分类号： C22C38/04 ,  C21D1/26 ,  C21D6/008 ,  C21D8/02 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1283 ,  C21D10/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/16

摘要： A method of manufacturing oriented Si steel containing Cu with high electric-magnetic property comprises: hot rolling slab; after first cold rolling, heating it to 800° C. or higher temperature and performing intermediate decarburization annealing in a protective atmosphere with PH2O/PH2 of 0.50˜0.88 for 3-8 minutes, to decrease carbon content of the steel plate to less than 30 ppm; then peening and acid-pickling to remove oxide of Fe on surface and to control oxygen content to lower than 500 ppm; secondary cold rolling to final thickness and coating separation agent in water-slurry form; drying to decrease water content to lower than 1.5%; high-temperature annealing in a protective atmosphere containing hydrogen with oxidation degree (PH2O/PH2) of 0.0001-0.2; finally applying a tension coating and leveling tension annealing.

摘要翻译： 含有具有高电磁性能的Cu的取向Si钢的方法包括：热轧板; 在第一次冷轧后，加热到800℃或更高的温度，并在保护气氛中进行中间脱碳退火，PH2O / PH2为0.50〜0.88，3-8分钟，将钢板的碳含量降低到30 ppm; 然后进行喷丸和酸洗以除去表面上的Fe的氧化物，并控制氧含量低于500ppm; 二次冷轧至最终厚度，涂层分离剂为水浆形式; 干燥以减少含水量低于1.5％; 在含氢氧化程度（PH2O / PH2）为0.0001-0.2的保护气氛中进行高温退火; 最后施加张力涂层和流平张力退火。

公开(公告)号：US20110139313A1

公开(公告)日：2011-06-16

申请号：US12934897

申请日：2009-03-25

申请人： Guohua Yang ,  Huande Sun ,  Yaming Ji ,  Guobao Li ,  Hongxu Hei

发明人： Guohua Yang ,  Huande Sun ,  Yaming Ji ,  Guobao Li ,  Hongxu Hei

IPC分类号： C21D8/00 ,  C21D6/00

CPC分类号： C22C38/02 ,  C21D1/26 ,  C21D3/04 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0278 ,  C21D8/0284 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16

摘要： A manufacturing method of oriented Si steel with high electric-magnetic property comprises the following steps: smelting steel in converter or electric furnace; refining molten steel in two stages; continuous casting to obtain slab; hot rolling; first cold rolling; decarburizing annealing; secondary cold rolling; applying an annealing separator based on MgO and annealing at high temperature; applying an insulating coating and leveling tension annealing. The slab comprises (in wt %): C 0.020-0.050%, Si 2.6-3.6%, S 0.015-0.025%, Als 0.008-0.028%, N 0.005-0.020%, Mn 0.15-0.5%, Cu 0.3-1.2%, balance Fe and inevitable impurities, in which 10≦Mn/S≦20 and Cu/Mn≧2. The method could produce oriented Si steel with high magnetic induction intensity and low iron loss at low cost.

摘要翻译： 具有高电磁性能的取向Si钢的制造方法包括以下步骤：在转炉或电炉中冶炼钢; 两级精炼钢水; 连续铸造获得板坯; 热轧; 第一次冷轧; 脱碳退火; 二次冷轧; 应用基于MgO的退火分离器和高温退火; 施加绝缘涂层和流平张力退火。 板坯包含（重量％）：C 0.020-0.050％，Si 2.6-3.6％，S 0.015-0.025％，Als 0.008-0.028％，N 0.005-0.020％，Mn 0.15-0.5％，Cu 0.3-1.2％ 平衡Fe和不可避免的杂质，其中10＆nlE; Mn / S＆NlE; 20和Cu /Mn≥2。 该方法可以以低成本制造具有高磁感应强度和低铁损的取向Si钢。

公开(公告)号：US08333846B2

公开(公告)日：2012-12-18

申请号：US12934897

申请日：2009-03-25

申请人： Guohua Yang ,  Huande Sun ,  Yaming Ji ,  Guobao Li ,  Hongxu Hei

发明人： Guohua Yang ,  Huande Sun ,  Yaming Ji ,  Guobao Li ,  Hongxu Hei

IPC分类号： H01F1/147

CPC分类号： C22C38/02 ,  C21D1/26 ,  C21D3/04 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0278 ,  C21D8/0284 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16

摘要： A manufacturing method of oriented Si steel with high electric-magnetic property comprises the following steps: smelting steel in converter or electric furnace; refining molten steel in two stages; continuous casting to obtain slab; hot rolling; first cold rolling; decarburizing annealing; secondary cold rolling; applying an annealing separator based on MgO and annealing at high temperature; applying an insulating coating and leveling tension annealing. The slab comprises (in wt %): C 0.020-0.050%, Si 2.6-3.6%, S 0.015-0.025%, Als 0.008-0.028%, N 0.005-0.020%, Mn 0.15-0.5%, Cu 0.3-1.2%, balance Fe and inevitable impurities, in which 10≦Mn/S≦20 and Cu/Mn≧2. The method could produce oriented Si steel with high magnetic induction intensity and low iron loss at low cost.

摘要翻译： 具有高电磁性能的取向Si钢的制造方法包括以下步骤：在转炉或电炉中冶炼钢; 两级精炼钢水; 连续铸造获得板坯; 热轧; 第一次冷轧; 脱碳退火; 二次冷轧; 应用基于MgO的退火分离器和高温退火; 施加绝缘涂层和流平张力退火。 板坯包含（重量％）：C 0.020-0.050％，Si 2.6-3.6％，S 0.015-0.025％，Als 0.008-0.028％，N 0.005-0.020％，Mn 0.15-0.5％，Cu 0.3-1.2％ 平衡Fe和不可避免的杂质，其中10＆nlE; Mn / S＆NlE; 20和Cu /Mn≥2。 该方法可以以低成本制造具有高磁感应强度和低铁损的取向Si钢。

公开(公告)号：US09038429B2

公开(公告)日：2015-05-26

申请号：US13142955

申请日：2009-12-31

申请人： Guobao Li ,  Pijun Zhang ,  Yongjie Yang ,  Kanyi Shen ,  Zhuochao Hu ,  Peiwen Wu ,  Weizhong Jin ,  Quanli Jiang

发明人： Guobao Li ,  Pijun Zhang ,  Yongjie Yang ,  Kanyi Shen ,  Zhuochao Hu ,  Peiwen Wu ,  Weizhong Jin ,  Quanli Jiang

IPC分类号： C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/147 ,  B21B1/36 ,  B21B3/00 ,  B21B9/00 ,  C21D1/28

CPC分类号： C21D8/12 ,  B21B1/36 ,  B21B3/00 ,  B21B9/00 ,  C21D1/28 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/14775

摘要： The invention provides a method for producing grain-oriented silicon steel with single cold rolling, comprising: 1) smelting, refining and continuous casting to obtain a casting blank; 2) hot rolling; 3) normalization, i.e. normalizing annealing and cooling; 4) cold-rolling, i.e. single cold rolling at a cold rolling reduction rate of 75-92%; 5) decarburizing annealing at 780-880° C. for 80-350 s in a protective atmosphere having a due point of 40-80° C., wherein the total oxygen [O] in the surface of the decarburized sheet: 171/t≦[O]≦313/t (t represents the actual thickness of the steel sheet in mm), the amount of absorbed nitrogen: 2-10 ppm; 6) high temperature annealing, wherein the dew point of the protective atmosphere: 0-50° C., the temperature holding time at the first stage: 6-30 h, the amount of absorbed nitrogen during high-temperature annealing: 10-40 ppm; 7) hot-leveling annealing. The invention may control the primary recrystallization microstructure of steel sheet effectively by controlling the normalization process of hot rolled sheet to form sufficient favorable (Al, Si)N inclusions from nitrogen absorbed by slab during decarburizing annealing and low-temperature holding of high-temperature annealing, facilitating the generation of stable, perfect secondary recrystallization microstructure of the final products. In addition, the invention avoids the impact of nitridation using ammonia on the underlying layer in prior art, and thus the formation of a good glass film underlying layer is favored.

摘要翻译： 本发明提供一种单次冷轧生产晶粒取向硅钢的方法，包括：1）熔炼，精炼和连续铸造得到铸坯; 2）热轧; 3）归一化，即归一化退火和冷却; 4）冷轧，即以75-92％的冷轧压下率进行单次冷轧; 5）在适当点为40-80℃的保护气氛中，在780-880℃下进行80-350秒的脱碳退火，其中脱碳片表面的总氧[O]为171 / t·nlE ; [O]＆nlE; 313 / t（t表示钢板的实际厚度，单位为mm），吸附氮量：2-10ppm; 6）高温退火，其中保护气氛的露点为0-50℃，第一阶段的保温时间为6-30h，高温退火时吸收的氮量为10-40 ppm; 7）热水平退火。 本发明可以通过控制热轧板的归一化过程来控制钢板的一次再结晶微观结构，从而在脱碳退火和低温保持低温退火过程中形成足够的（Al，Si）N夹杂物， ，促进了最终产品的稳定，完美的二次再结晶微观结构的产生。 此外，本发明避免了使用氨氮在现有技术中对下层的影响，因此有利于形成良好的玻璃膜下层。

公开(公告)号：US20120000262A1

公开(公告)日：2012-01-05

申请号：US13142955

申请日：2009-12-31

申请人： Guobao Li ,  Pijun Zhang ,  Yongjie Yang ,  Kanyi Shen ,  Zhuochao Hu ,  Peiwen Wu ,  Weizhong Jin ,  Quanli Jiang

发明人： Guobao Li ,  Pijun Zhang ,  Yongjie Yang ,  Kanyi Shen ,  Zhuochao Hu ,  Peiwen Wu ,  Weizhong Jin ,  Quanli Jiang

IPC分类号： B21B27/06

CPC分类号： C21D8/12 ,  B21B1/36 ,  B21B3/00 ,  B21B9/00 ,  C21D1/28 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/14775

摘要： The invention provides a method for producing grain-oriented silicon steel with single cold rolling, comprising: 1) smelting, refining and continuous casting to obtain a casting blank; 2) hot rolling; 3) normalization, i.e. normalizing annealing and cooling; 4) cold-rolling, i.e. single cold rolling at a cold rolling reduction rate of 75-92%; 5) decarburizing annealing at 780-880° C. for 80-350 s in a protective atmosphere having a due point of 40-80° C., wherein the total oxygen [0] in the surface of the decarburized sheet: 171/t≦[O]≦313/t (t represents the actual thickness of the steel sheet in mm), the amount of absorbed nitrogen: 2-10 ppm; 6) high temperature annealing, wherein the dew point of the protective atmosphere: 0-50° C., the temperature holding time at the first stage: 6-30 h, the amount of absorbed nitrogen during high-temperature annealing: 10-40 ppm; 7) hot-leveling annealing. The invention may control the primary recrystallization microstructure of steel sheet effectively by controlling the normalization process of hot rolled sheet to form sufficient favorable (Al, Si)N inclusions from nitrogen absorbed by slab during decarburizing annealing and low-temperature holding of high-temperature annealing, facilitating the generation of stable, perfect secondary recrystallization microstructure of the final products. In addition, the invention avoids the impact of nitridation using ammonia on the underlying layer in prior art, and thus the formation of a good glass film underlying layer is favored.

摘要翻译： 本发明提供一种单次冷轧生产晶粒取向硅钢的方法，包括：1）熔炼，精炼和连续铸造得到铸坯; 2）热轧; 3）归一化，即归一化退火和冷却; 4）冷轧，即以75-92％的冷轧压下率进行单次冷轧; 5）在正常点为40-80℃的保护气氛中，在780-880℃下进行80-350秒的脱碳退火，其中脱碳薄片表面的总氧[0]为171 / t＆ ; [O]＆nlE; 313 / t（t表示钢板的实际厚度，单位为mm），吸附氮量：2-10ppm; 6）高温退火，其中保护气氛的露点为0-50℃，第一阶段的保温时间为6-30h，高温退火时吸收的氮量为10-40 ppm; 7）热水平退火。 本发明可以通过控制热轧板的归一化过程来控制钢板的一次再结晶微观结构，从而在脱碳退火和低温保持低温退火过程中形成足够的（Al，Si）N夹杂物， ，促进了最终产品的稳定，完美的二次再结晶微观结构的产生。 此外，本发明避免了使用氨氮在现有技术中对下层的影响，因此有利于形成良好的玻璃膜下层。

公开(公告)号：US09460054B2

公开(公告)日：2016-10-04

申请号：US13643371

申请日：2011-04-12

申请人： Meihong Wu ,  Weizhong Jin ,  Huande Sun ,  Guohua Yang ,  Kanyi Shen ,  Jie Huang ,  Guobao Li

发明人： Meihong Wu ,  Weizhong Jin ,  Huande Sun ,  Guohua Yang ,  Kanyi Shen ,  Jie Huang ,  Guobao Li

IPC分类号： G06F17/13 ,  G01N27/72 ,  G01R33/00

CPC分类号： G06F17/13 ,  G01N27/72 ,  G01R33/0064

摘要： A method for detecting electromagnetic property of oriented silicon steel, the method comprises: measuring Euler angles of each of crystal grains in a specimen by use of metallographic etch-pit method; calculating orientation deviation angle θi (degree) of the crystal grain; combining area Si (mm2) of the crystal grain and correction coefficient X of element Si (X=0.1˜10 T/degree); correcting on the basis of the magnetic property B0 (saturation magnetic induction, T) of single-crystal material by using these parameters (θi, Si, X), formula for correcting is B 8 = - 0.015 × X × ∑ n = 1 i ⁢ S i ⁢  θ i  ∑ n = 1 i ⁢ S i + ( B 0 - 0.04 ) ( 1 ) obtaining electromagnetic property B8 of the oriented silicon steel by the above calculations. The present invention can implement detection of electromagnetic property of a specimen under the circumstances that there is no magnetizm measuring device or that magnetizm measuring devices cannot be used due to reasons such as weight and size of the specimen being too small or surface quality of the specimen being poor.

公开(公告)号：US20130299049A1

公开(公告)日：2013-11-14

申请号：US13988738

申请日：2011-04-28

申请人： Meihong Wu ,  Weizhong Jin ,  Huande Sun ,  Guohua Yang ,  Kanyi Shen ,  Jie Huang ,  Deyang Hu ,  Guobao Li

发明人： Meihong Wu ,  Weizhong Jin ,  Huande Sun ,  Guohua Yang ,  Kanyi Shen ,  Jie Huang ,  Deyang Hu ,  Guobao Li

IPC分类号： C21D8/00

CPC分类号： C21D8/005 ,  C22C38/02

摘要： A method for manufacturing a grain-oriented silicon steel having excellent magnetic performance, comprising steps as follows 1)conventionally melting and casting into a steel blank; 2) heating the steel blank and hot rolling the same into a strip of steel; 3)normalizing process; carrying out the normalizing process having two stages, wherein the strip is firstly heated to 1100˜1200° C., then cooled to 900˜1000° C. within 50˜200 s; and next, the strip is rapidly cooled in water having a temperature of 10-100; in this period, a tension force is applied to the strip of steel, the strip of steel in the temperature range of 900 ° C.˜500° C. has a stress of 1˜200N/mm2; 4)cold rolling, i.e. carrying out a primary cold rolling, or a double cold rolling with intermediate annealing; 5)carrying out primary recrystallizing annealing, then coating an annealing separator, whose main composition is MgO, to carry out final product annealing comprising secondary recrystallizing annealing and purifying annealing. The invention optimizes the content and distribution of martensite in the steel plate after normalization by adjusting the tension force applied to the steel plate while normalization transformation, so as to make the content of martensite in the range ensuring a better magnetic performance of the final product and to optimize the magnetic performance of final products.

摘要翻译： 一种具有优异磁性能的晶粒取向硅钢的制造方法，包括以下步骤：1）通常熔融铸造成钢坯; 2）加热钢坯，并将其热轧成钢带; 3）归一化过程; 进行两阶段的归一化处理，首先将条带加热至1100〜1200℃，然后在50〜200s内冷却至900〜1000℃; 然后将条带在温度为10-100℃的水中快速冷却; 在这段时间内，对钢带施加张力，在900〜500℃的温度范围内，钢带的应力为1〜200N / mm2; 4）冷轧，即进行一次冷轧，或进行中间退火的双层冷轧; 5）进行一次再结晶退火，然后涂覆其主要组成为MgO的退火分离剂，进行包括二次再结晶退火和纯化退火的最终产品退火。 本发明通过调整在正常化转变时施加到钢板上的张力来使标准化后的钢板中马氏体的含量和分布优化，从而使得马氏体含量在确保最终产品的更好磁性能的范围内; 以优化最终产品的磁性能。

公开(公告)号：US20130284711A1

公开(公告)日：2013-10-31

申请号：US13876932

申请日：2011-04-28

申请人： Wangya Huang ,  Guobao Li ,  Xinqiang Zhang ,  Xing Mao ,  Wanqing Guo ,  Jianru Zhu ,  Banglin Xiang

发明人： Wangya Huang ,  Guobao Li ,  Xinqiang Zhang ,  Xing Mao ,  Wanqing Guo ,  Jianru Zhu ,  Banglin Xiang

IPC分类号： B23K26/36

CPC分类号： B23K26/362 ,  B23K26/361 ,  C21D1/38 ,  C21D8/12 ,  C21D8/1294 ,  C21D2201/05

摘要： A fast-speed laser scoring method is provided, in which a set of related laser scoring device is used to simultaneously score lines on the upper surface and the lower surface of an oriented silicon steel strip, which is being fed and traveling forwards on a production line, with high-focalized continuous wave laser beam; the lines scored on the upper surface and the lines scored on the lower surface have the same space between every two adjacent scored lines but are staggered each other in order to reduce iron loss evenly. The space between every two adjacent scored lines on the same surface is 6-12 mm, laser power is 1000-3000 W and scanning speed is 100-400 m/min. The machining rate of the scoring method and device attains 1.5-2 times the one of conventional scoring methods which can not simultaneously score the upper and lower surfaces of a steel strip at a time. The lines scored on a steel strip by the method can reduce iron loss of the strip by 10-16%.

摘要翻译： 本发明提供了一种快速的激光打标方法，其中使用一组相关的激光刻痕装置同时对生产中的正向进给和向前行进的定向硅钢带的上表面和下表面上的线进行划线 具有高焦距连续波激光束; 在上表面划线，并且在下表面划线的线在每两个相邻刻痕线之间具有相同的间隔，但彼此交错以便均匀地减少铁损。 同一表面两相邻划线之间的间隔为6-12mm，激光功率为1000-3000W，扫描速度为100-400m / min。 评分方法和装置的加工速度达到常规评分方法的1.5-2倍，不能同时对钢带的上表面和下表面进行评分。 通过该方法在钢带上划线的线可以将钢带的铁损减少10-16％。