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新买的十八子菜刀需要开刃吗
更新时间: 2020-11-03 00:00:00  

新买的十八子菜刀需要开刃。因为菜刀出厂时厂家不可能就磨得那么锋利,那样运输搬运就很危险了。开刃时将刀具打湿,成30度角来磨,磨完一边最磨另外一边,时不时加点水以免太干磨刀石损伤刀口。

刀在烧煅的时候,表面的铁或钢会氧化或含碳量高,会变脆。俗语说的开刃就是在刀口的地方把这些磨去,让钢部份露出来,这样就会更锋利。

关键词: 菜刀 需要

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