硬质合金刀具在高速切削时,必须使用水基加工液.然而发现使用时水基加工液会使硬质合金中的钴、碳化钨浸出.本文通过浸泡试验,借助于扫描电镜和能谱分析,研究了不同温度时三乙醇胺溶液、碳酸钠溶液和苯并三氮唑溶液对硬质合金刀具中钴和碳化钨浸出的影响.实验结果表明:三乙醇胺溶液对硬质合金刀具中的钴有浸出的作用,常温下钴的浸出率为17.32％,随着温度的升高浸出作用明显,150℃时钴的浸出率为47.72％；碳酸钠溶液对硬质合金刀具中碳化钨有浸出作用,常温下钨的浸出率为13.28％,随着温度的升高,碳化钨的氧化溶解加剧,钨元素的浸出更加明显,150℃时钨的浸出率为45.59％；苯并三氮唑溶液对硬质合金中的钴无浸出作用,对硬质合金中的钨浸出作用不明显,150℃时钨的浸出率为1.28％.
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