电工钢硅钢片-汽车钢自营品质有保障

电工钢硅钢片：用 25cm 爱泼斯坦方圈测量时，参照检测方法 GB/T 3655（IEC 60404-2，IDT）,一副试样由不少于24 片的样片组成。试样的长度方向应沿平行于产品轧制方向切取，试样长度方向与产品轧制方向的偏离角度应在±1 以内，试样应尽可能覆盖产品的全板宽范围。试样应的取样方法、河北秦皇岛附近尺寸及允许偏差应符合 GB/T 3655 的规定。测试前，试样应在制造方提供的条件下进行应力退火处理。测试产品时效试样的 比总损耗时，时效试样应在 225℃±5℃温度中持续保温 24h，然后空冷到环境温度。8.5.2 单片法（SST）测量用单片测试仪测量时，试样的取样方法、河北秦皇岛附近尺寸及允许偏差应符合 GB/T 13789（IEC 60404-3，IDT)）的规定。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，试样沿纵向的中心线位置与产品宽度方向中心位置偏移量应≤50mm，试样纵向与样板轧制方向的偏离角度应在±1 以内。单片法测量的试样不需要应力退火处理，也不允许进行时效测试。

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: