500快餐4小时真的假的

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退磁機磁場的穿透力是指什么?

2020-04-03 21:37:18 asycn 69

退磁機磁場的大小與退磁工件的長度與厚度值的穿透力有關,工件長度/厚度值愈大,在尺寸一定的情況下,退磁機磁場就越小。兩根長度相同而直徑不同的鋼棒放在同一線圈中,用相同的磁場強度磁化時,長度和厚度值越大的比長度和厚度尺寸越小的鋼棒表面磁場強度大,則退磁場小。磁化相同直徑和長度的鋼管和鋼棒,鋼管比鋼棒產生的退磁場小,因為鋼管的有效橫截面積小,有效直徑也小,古鋼管比鋼棒的退磁場小。所以,退磁場和碳鋼的厚度的關系在同樣長度情況下,碳鋼厚度越厚,退磁場越大。如果做磁粉探傷,則試片效果會隨厚度增加而效果變差。

臺式退磁器


500快餐4小时真的假的

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