磁性材料.第3部分:用单片试验机测量电工钢带和薄板磁性的方法

[中文适用范围]： IEC 60404-8-5 定义了具有规定机械性能和磁极化的电工钢带和钢板的牌号。具体而言，它提供了通用要求、机械性能、磁极化、几何特性、公差和技术特性，以及检验程序。本文件适用于用于旋转电机定子和转子的电工钢带和钢板。牌号根据其制造工艺分为两类：热轧牌号；冷轧牌号。它们对应于 IEC 60404-1 中的 D21 类。 [外文原描述]： IEC 60404-8-5:2020(E) defines the grades of electrical steel strip and sheet with specified mechanical properties and magnetic polarization. In particular, it gives general requirements, mechanical properties, magnetic polarization, geometric characteristics, tolerances and technological characteristics, as well as inspection procedures. This document applies to electrical steel strip and sheet intended for the construction of poles and rims of rotating electrical machines. The grades are grouped into two classes according to their manufacturing process: - hot-rolled grades; - cold-rolled grades. They correspond to Class D21 of IEC 60404-1. This edition includes the following significant technical changes with respect to the previous edition: a) extension of the range of products to include the improved grades; b) division of "flatness" into "edge wave (wave factor)" and "residual curvature" in consistent with IEC 60404-9; c) change length of test specimen for determinations of geometrical characters from 2 m to 1 m.