Binderless cemented carbide contains very little (<0.5 wt.%) or no metal binder and has an incomparable excellent wear resistance, corrosion resistance, excellent polishing, and oxidation resistance compare to traditional cemented carbide (Imasato et al., 1995). For now, many studies were focusing on the influence of Mo/Mo₂C on the microstructure and mechanical properties of traditional cemented carbide (Guo et al., 2008; Wang et al., 2010; Yu et al., 2015). However, to our knowledge, no report was found studying on Mo/Mo₂C added binderless cemented carbide. In this work, a series of binderless cemented carbides with diverse Mo₂C addition amounts (0–6 wt.%) were prepared by sintering and then hot isostatic pressing (HIP) at 2000°C under an isostatic pressure of 70 MPa. The microstructure and abrasive wear resistance of the obtained samples were systemically investigated. The grain size does not change with the increase of Mo₂C addition amount, while the abrasive wear resistance of the cemented carbide increases obviously. The data of the abrasive wear test show the wear volume loss of the cemented carbide reduces from 7.32 to 0.02 cm³/10⁵r when the Mo₂C addition amount change from 0 to 6.0 wt.%. The superior abrasion resistance of samples with higher Mo₂C content and the smoother appearance of the worn surfaces with no definite pullout of grains compared with other samples were result from the forming of (W,Mo)C because of the intermixing between WC and Mo₂C caused by high temperature sintering.

与传统的硬质合金相比，无粘结剂的硬质合金仅含有很少（<0.5 wt。％）或不含金属粘结剂，并且具有无与伦比的优异的耐磨性，耐腐蚀性，出色的抛光性和抗氧化性（Imasato等， 1995年）。目前，许多研究都集中在Mo / Mo ₂ C对传统硬质合金显微组织和力学性能的影响上（Guo等，2008年; Wang等，2010年; Yu等，2015年）。然而，据我们所知，没有发现关于添加Mo / Mo ₂ C的无粘结剂硬质合金的研究报告。在这项工作中，通过烧结，然后在70 MPa的等静压下于2000°C进行热等静压（HIP），制备了一系列具有不同Mo ₂ C添加量（0-6 wt。％）的无粘结剂硬质合金。系统地研究了所得样品的微观结构和耐磨性。晶粒尺寸不随Mo ₂ C添加量的增加而变化，而硬质合金的耐磨性明显提高。磨粒磨损试验的数据显示了超硬合金的磨损体积损失减少了从7.32至0.02厘米³ /10 ⁵ R当Mo的₂ C的添加量从0变为6.0重量％。（W，Mo）C的形成是由于WC和Mo混合造成的，与其他样品相比，Mo ₂ C含量较高的样品具有优异的耐磨性，并且磨损表面的光滑外观没有明显的晶粒脱落₂ C是高温烧结引起的。