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1. 发明申请

US20130299049A1 MANUFACTURE METHOD OF ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE 审中-公开
标题翻译：具有良好磁性能的定向硅钢的制造方法
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。

2. 发明授权

US09727061B2 Method and apparatus for controlling a furnace pressure of a continuous annealing furnace 有权
公开(公告)号：US09727061B2
公开(公告)日：2017-08-08
申请号：US13881698
申请日：2011-04-14
申请人： Yongfeng Liu , Huazhong Gu , Guoqiang Qian , Bin Yin , Dejian Wen , Hongxu Hei , Jun Zhang , Deyang Hu
发明人： Yongfeng Liu , Huazhong Gu , Guoqiang Qian , Bin Yin , Dejian Wen , Hongxu Hei , Jun Zhang , Deyang Hu
IPC分类号： G05D16/20 , F27D19/00 , F27D21/00 , C21D1/74 , C21D9/56 , C21D11/00
CPC分类号： G05D16/20 , C21D1/74 , C21D9/561 , C21D11/00 , F27D19/00 , F27D21/00 , F27D2019/0031
摘要： A method for controlling furnace pressure of a continuous annealing furnace is disclosed. The method comprises detecting a coal gas flow volume and an air flow volume in each section by use of a coal gas flow volume detector and an air flow volume detector disposed in each section of a continuous annealing furnace, respectively, adding up the coal gas flow volume detected in each section to obtain a total input coal gas flow volume; adding up the air flow volume detected in each section to obtain a total input air flow volume, and calculating a pre-combustion gas pressure in the furnace based on the total input coal gas flow volume and the total input air flow volume; detecting compositions of the coal gas and a ratio of the coal gas to the air by use of a composition detector; detecting a pre-combustion gas temperature in the furnace by use of a thermocouple; predicting post-combustion gas compositions and a total gas volume based on chemical combustion reaction equations and based on the total input coal gas flow volume, the total input air flow volume, the coal gas compositions and the ratio of the coal gas to the air; igniting the coal gas and the air in the furnace; and detecting a post-combustion gas temperature in the furnace by use of a thermocouple; calculating a post-combustion gas pressure in the furnace based on the pre-combustion gas pressure in the furnace, pre-combustion gas temperature in the furnace and the post-combustion gas temperature in the furnace; and calculating an opening degree for an exhaust gas fan based on the pre-combustion gas pressure in the furnace and the post-combustion gas pressure in the furnace and by use of a gas increment pass algorithm, and using the opening degree to control the exhaust gas fan.

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