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采用金刚石压头划痕法在抛光后的硬质合金表面制备了平行微织构,划痕载荷分别为5,10,15 N,织构间距为30,50,80,100μm。在UTM-2摩擦磨损试验机上进行了微织构硬质合金的摩擦磨损试验,对摩擦因数进行了在线测量,并利用超景深显微镜观察了表面微织构摩擦磨损形貌。试验结果表明:硬质合金的表面微织构有助于降低摩擦因数,当划痕载荷为10 N、织构间距为30μm时,摩擦因数最小,只有0.36。
Parallel micro-texture was prepared on the polished cemented carbide surface by using diamond indenter scratch method. The scratch loads were 5, 10 and 15 N respectively, and the spacings of the textured structures were 30, 50, 80 and 100 μm. The friction and wear test of micro-textured cemented carbide was carried out on the UTM-2 friction and wear testing machine. The friction coefficient was measured on-line. The microstructure and friction and wear of the micro-textured surface were observed by using a depth of field microscope. The experimental results show that the micro-texture of the cemented carbide helps to reduce the friction coefficient. When the scratch load is 10 N and the pitch of the texture is 30 μm, the friction coefficient is the smallest, only 0.36.