Abstract
Ultrafine WC-Co cemented carbide cutting inserts were prepared by <em>direct low pressure sintering and low pressure sintering after the </em><em>powder pre</em><em>treatment, tool life test</em><em>s</em><em> of continuous cutting superalloy GH2132 were carried out, respectively</em><em>.</em> ZEISS continuous zoom stereo microscope and microphotograph system were used to observe flank surface wear morphology of the cutting inserts, <em>and analysis the topography and elements of central wear region of flank </em><em>sur</em><em>face </em><em>by</em><em> </em><em>X</em><em>-ray </em>energy dispersive spectrometry<em> and scanning electron microscope. </em>The results show that <em>the main wear mechanism of ultrafine </em>cemented carbide<em> cutting </em><em>insert</em><em>s is </em><em>adhesive wear, </em>and the wear resistance of <em>ultrafine </em>cemented carbide<em> cutting </em><em>insert</em><em>s that low pressure sintering after </em><em>powder</em><em> </em><em>pre</em><em>treatment</em> is <em>superior to direct sintering, </em><em>powder </em>pretreatment helps increase the resistance of abrasive wear, adhesive wear and oxidative wear as well as diffusive wear of cutting inserts.
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