IEC 60404-13:2018 磁性材料第13部分:电工钢带和电工钢片电阻率密度和堆积系数的测量方法
标准编号：IEC 60404-13:2018
中文名称：磁性材料第13部分:电工钢带和电工钢片电阻率密度和堆积系数的测量方法
英文名称：Magnetic materials - Part 13: Methods of measurement of resistivity, density and stacking factor of electrical steel strip and sheet
发布日期：2018-07-10
标准范围
IEC？60404-13:20 18规定了用于确定晶粒取向和非晶粒取向电工钢带和薄板的电阻率、密度和堆叠因子的方法。这些量对于确定材料的物理特性是必要的。此外，密度对于允许确定磁极化、电阻率和堆叠因子的指定值是必要的。？由于这些特性是温度的函数，除非本文件中另有规定，否则将在（23±5）°C的环境温度下进行测量。与上一版相比，此版本包括以下重大技术变更:改变了密度和电阻率部分的顺序，并修改了文件标题以反映这一点；货车-der-Pauw法（方法R2）也适用于Epstein条试样；介绍了气体比重瓶法，引用了液体浸渍法和基于化学成分的计算法；堆叠因数部分的要求，如试件尺寸的公差、测量的重复性等发生变化；使用矩形薄片确定电阻率的设备的示例，该矩形薄片先前是正文的一部分，被移动以构成信息附件A；添加了使用气体比重瓶法测定密度的示例作为信息性附录B；添加了基于硅和铝含量计算的密度测定示例作为信息附录C。
IEC？60404-13:2018 specifies the methods used for determining the resistivity, density and stacking factor of grain-oriented and non-oriented electrical steel strip and sheet. These quantities are necessary to establish the physical characteristics of the material. Moreover, the density is necessary to allow specified values of the magnetic polarization, resistivity and stacking factor to be determined.？
Since these properties are functions of temperature, the measurements will be made at an ambient temperature of (23 ±5) °C except when specified in this document.
This edition includes the following significant technical changes with respect to the previous edition:
- the sequence of the density and resistivity sections is changed and the title of the document revised to reflect this;
- the van-der-Pauw method (Method R2) is also applicable to Epstein strip specimens;
- the gas pyknometer method is introduced, and the liquid immersion method and the calculation method based on the chemical composition are quoted;
- the requirements of the stacking factor section, such as the tolerance of the dimensions of the test specimen and the repeatability of measurement, are changed;
- an example of the apparatus for determination of the resistivity using a rectangular sheet, which was previously part of the main body of the text, is moved to constitute informative Annex A;
- an example of the determination of the density by using the gas pyknometer method is added as an informative Annex B;
- an example of the determination of density based on the calculation of silicon and aluminium contents is added as an informative Annex C.
标准预览图
