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金相拋光機使用需知

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使用金相拋光機之前要了解到的技術。
金相拋光機操縱的重點是要想辦法盡可能快的得到大的拋光速率,以便盡快撤除磨光時孕育發生的毀傷層。同時也要使拋光毀傷層不會影響終極視察到的構造,即不會造成假構造。這兩個要求是相互矛盾的。前者要求利用較粗的磨料,以包管有較大的拋光速率往復除磨光的毀傷層,但拋光毀傷層也較深;后者要求利用細的質料,使拋光毀傷層較淺,但拋光速率低。為了處理好這個矛盾,好的解決方法便是把拋光分為兩個階段舉行。起首是粗拋,目標是去除磨光毀傷層,這一階段應具有大的拋光速率,粗拋形成的表層毀傷是次要的思量,不外也應當盡大概小;其次是精拋(或稱終拋),其目標是去除粗拋孕育發生的表層毀傷,使拋光毀傷減到小。拋光時,試樣磨面與拋光盤應絕對平行并勻稱地輕壓在拋光盤上,細致防備試樣飛出和因壓力太大而孕育發生新磨痕。

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  更新時間:2019-12-4 8:37:19  
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