Abstract WC-Co-based cemented carbides with cubic carbides (Ti,W)C/TaC were prepared and the early oxidation behavior of their surface layers was investigated. Different carbides exhibit independent oxidation processes and selective oxidation behavior. The solid solution containing Ti slows the oxidation process due to its high stability. In addition, an oxidation stage model was established to describe the formation of surface oxide scale of cemented carbides. The increasing (Ti,W)C/TaC content is beneficial to hinder the oxygen diffusion at 500−700 °C during the early oxidation. Selective oxidation of carbides is the main reason to change the oxidation resistance of surface layer.

中文翻译：

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(Ti,W)C/TaC添加对WC-Co硬质合金表层早期氧化行为的影响

摘要 制备了立方碳化物(Ti,W)C/TaC的WC-Co基硬质合金，并研究了其表层的早期氧化行为。不同的碳化物表现出独立的氧化过程和选择性氧化行为。含 Ti 的固溶体由于其高稳定性而减缓了氧化过程。此外，还建立了氧化阶段模型来描述硬质合金表面氧化皮的形成。(Ti,W)C/TaC 含量的增加有利于在早期氧化过程中阻碍氧在 500-700°C 的扩散。碳化物的选择性氧化是改变表层抗氧化能力的主要原因。