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引言通常所指磁针质量主要是指其灵敏度及其使用寿命,除了轴尖和玛瑙轴承对指针灵敏度的影响外、磁针材料的选择和磁性能指标是提高磁针质量的关键。一、Co52V12精密合金钢和ECr3普通磁钢的性能过去制造磁针材料一般选用ECr3普通磁钢,该材料属于淬火硬化型磁钢,其矫顽力约60奥斯特,磁能积较低,为6×10~5高·奥。因此,使用寿命较短,经一段时间使用后或稍有外界电磁影响,磁针性能就明显下
Introduction Generally refers to the quality of the needle refers to its sensitivity and its service life, in addition to shaft and agate bearings on the sensitivity of the pointer, the magnetic needle material selection and magnetic performance index is to improve the quality of the needle key. First, the Co52V12 precision alloy steel and ECr3 ordinary magnet past the production of magnetic needle material commonly used ECr3 ordinary magnet, the material is quench hardened magnet, the coercivity of about 60 Oe, the magnetic energy product is low, 6 × 10 ~ 5 high · Austria. Therefore, the service life is short, after a period of time or a little external electromagnetic effects, the needle performance significantly