电工钢硅钢片：磁性能7.1.1 在 6.3 条件下提供的冷轧取向电工钢的特性应符合表 3、青海西宁表 4、青海西宁表 5、青海西宁表 6、青海西宁表 7、青海西宁表 8 和表 9的规定，时效试样也应满足这些特性。对带有涂层的产品，绝缘涂层的质量应被计算在内。7.1.2 表 3、青海西宁表 4 和表 6 中的普通型、青海西宁高磁极化强度型、青海西宁耐热刻痕磁畴细化型产品的磁性能应该按 GB/T3655 测试，在测试前，试样应在制造方提供的条件下进行应力退火（通常应力退火温度的范围为 800℃±20℃，退火时间为 2h，退火后随炉冷却）；但表 5 中的非耐热磁畴细化法（如激光刻痕）生产的产品磁性能应按照 GB/T 13789 测试，试样在测试前不需要进行应力退火。经供需双方协商，表 3、青海西宁表 4 和表 6 中产品的磁性能也可按照 GB/T 13789 测试。7.1.3 表 7、青海西宁表 8 和表 9 中各系列产品的磁性能检测方法，按产品类型对照本文件第 7.1.2 条款的规定执行。7.1.4 在磁场强度 H ＝ 800 A/m 条件下测试所得的磁极化强度 J800应符合表 3、青海西宁表 4、青海西宁表 5、青海西宁表 6、青海西宁表 7、青海西宁表 8 和表 9 的规定，其中，同一产品按 GB/T 13789 方法所测得的磁极化强度值 J800比 GB/T 3655 方法所测得的磁极化强度值偏低。7.1.5 同一产品在磁极化强度 1.7T、青海西宁同城频率 50Hz 或 60Hz 条件下，按 GB/T 13789 方法所测得的 50Hz 和60Hz 条件下比总损耗值，参照 IEC 6040-8-7 Edition 5.0 2020-09 中规定的转换系数 Fc＝0.925 进行转换，转换后的 P1.7/50和 P1.7/60应符合表 3、青海西宁同城表 4、青海西宁同城表 5、青海西宁同城表 6、青海西宁同城表 7、青海西宁同城表 8 和表 9 的规定

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: