武汉DW440-35电工钢屈服拉伸

电工钢硅钢片：宝钢激光刻痕磁畴细化型产品磁性能检测采用了单片测试仪进行测试，通常情况下取向电工钢只测试平行于轧制方向的磁性能水平，特殊情况可以约定分别检测平行于轧制方向和垂直于轧制方向的磁性能。具体测试方法符合 GB/T 13789-2008（IEC 60404-3:2002，IDT）相关规定，测试试样公称尺寸为 500mm×500mm，测试试样长度的误差在±0.1％以内，测试试样的质量误差在±0.1％以内。为保证磁性测试结果对带钢磁性能的代表性，裁剪大单片试样时，试样中心位置与带钢宽度方向中心位置偏移量控制在≤50mm，试样边部距离样板边部控制在≥100mm，试样纵向与样板轧制方向的偏离角度≤1.0°，如附图 A.2 所示。试样要求剪切整齐、当地平坦，直角性好，表面清洁，无影响性能试验的缺陷，试样边部不允许剪切后打磨，剪切毛刺高度不应高于 20μm。大单片试样不经过应力退火处理直接测试。

电工钢硅钢片In addition to the types listed above, there are also some special purpose electrical steel plates, such as 0.15 and 0.20mm thick 3％ Si cold-rolled non oriented silicon steel strips and 0.025, 0.05, and 0.1mm thick 3％ Si cold-rolled oriented silicon steel strips, used for medium and high-frequency motors, transformers, and pulse transformers； 0.7mm thick 3％ Si high-strength cold-rolled non oriented silicon steel plate for relays and power switches； High strength cold-rolled electrical steel plate for new high-speed motor rotors； Low carbon electrical steel hot-rolled thick and cold-rolled plates for magnetic shielding and high-energy accelerator electromagnets such as medical magnetic resonance tomography scanners； 4.5％ to 6.5％ Si high silicon steel plates for high-frequency motors, transformers, and magnetic shielding.Generally, motors, transformers, and other electrical components are required to have high efficiency, low power consumption, small size, and light weight. Electrical steel plates are usually guaranteed to have magnetic properties based on core loss and magnetic induction strength [1] [2]. The requirements for the performance of electrical steel plates are as follows:Low core loss (PT)Iron core loss refers to the ineffective electrical energy consumed by an iron core when magnetized in an alternating magnetic field of ≥ 50Hz, abbreviated as iron loss, also known as alternating loss, and its unit is W/kg. The ineffective electrical energy consumed due to various obstacles caused by magnetic flux changes not only loses electrical energy through the heating of the iron core, but also causes temperature rise of the motor and transformer. The iron loss (PT) of electrical steel includes three parts: hysteresis loss, eddy current loss (Pe), and anomalous loss (Pa). Electrical steel plates have low iron loss, which can save a lot of electricity, prolong the operating time of motors and transformers, and simplify cooling devices. Due to the iron loss of electrical steel plates, which accounts for 2.5％ to 4.5％ of the annual electricity generation in various countries, countries always try their best to reduce iron loss in the production of electrical steel plates, and use iron loss as the most important indicator to assess the magnetic properties of products. The iron loss value of products is used as the basis for classifying product grades. Cold rolled oriented electrical steel: Cold rolled oriented electrical steel is a high-end product in the field of electrical steel. Compared with cold rolled non oriented electrical steel, its magnetism has strong directionality； It has superior high magnetic permeability and low loss characteristics in the direction of easy magnetization rolling. The iron loss of oriented steel strip in the rolling direction is only 1/3 of that in the transverse direction, and the ratio of magnetic permeability is 6:1. Application: The main purpose of cold-rolled oriented silicon steel strip is for transformer manufacturing.Full process cold rolled non oriented silicon steel coating: The surface of the full process cold rolled silicon steel is coated with a semi transparent insulation coating, which has different codes in different standards. Taking Baosteel‘s Q/BQB 480 2014 as an example:

电工钢硅钢片近20年来，我国硅钢产业取得了长足的进步，这其中以首钢、当地武钢和宝钢为代表。得益于我国钢铁行业全流程的技术进步，这些企业在控制无取向硅钢整体质量稳定性和取向硅钢方面已经具有较高技术实力。2014年我国硅钢生产达到823万吨，高端产品有20~30万吨的进口量，2015年，我国共生产电工钢约836万吨，进口量进一步下降到14万吨。但是，与日本相比我国在高端电工钢领域仍有不小的差距，这集中体现在高磁感无取向硅钢、当地超低铁损Hi-B取向硅钢和高硅钢等产品上。例如，新日铁公司(现新日铁住金)能够实现0.15~0.35mm系列厚度规格极低铁损Hi-B取向电工钢的稳定供货，引领取向硅钢工艺发展。在特殊用途硅钢方面，日本钢管公司(现JFE)通过气相沉积法(CVD)渗硅的方式实现了高硅钢薄带的供货。随着我国装备制造业的产业升级，高端硅钢产品的需求会越来越迫切。我国与日韩等钢铁强国在这一领域的竞争将会更加激烈，这就要求我国相关科研人员通过革命性创新进行下一代硅钢生产技术的研发，引领世界电工钢技术的发展。低铁损、当地高磁感电机用无取向硅钢、当地薄规格超低铁损高磁感取向硅钢和中高频节能电器用高硅钢是电工钢产业的发展方向。