【摘要】 硬质合金的碳含量是影响组织和性能的重要因素，研究其烧结过程中的脱氧行为是实现硬质合金碳含量和磁性能可控的关键。通过球磨制备了各种原料粉末以及硬质合金混合料，采用X射线光电子能谱（XPS）分析氧化物种类，通过热分析质谱联用仪（DSC-TG-MS）表征烧结过程碳氧反应的热量和重量变化以及气体释放信息，详细研究了WC-Co基硬质合金烧结过程的脱氧行为。结果表明，在球磨增氧作用下，混合料中形成了CoO、WO₃、Cr₂O₃、Ta₂O₅等氧化产物。在高温碳氧还原过程中，CoO和WO₃在450～800℃依次被还原。晶粒抑制剂Cr₃C₂和TaC会在烧结过程中被钨氧化物氧化，氧化产物在800～1050℃被还原，对烧结过程产生重大影响。研究结果可为烧结工艺的优化提供依据。更多还原

【Abstract】 The carbon content of hard alloys is an important factor affecting their structure and properties, and studying their deoxidation behavior during sintering is the key to achieving controllable carbon content and magnetic properties of hard alloys. This article prepared various raw material powders and hard alloy mixtures by ball milling, analyzed the types of oxides using X-ray photoelectron spectroscopy（XPS）, and characterized the heat and weight changes of carbon oxygen reaction and gas release information during the sintering process using thermal analysis mass spectrometry（DSC-TG-MS）. The deoxygenation behavior of WC-Co based hard alloy sintering process was studied in detail. The results showed that under the effect of ball milling and oxygen addition, oxidation products such as CoO, WO₃, Cr₂O₃,Ta₂O₅ were formed in the mixture. During the high-temperature carbon oxygen reduction process, Co O and WO₃ are sequentially reduced at 450-800 ℃. The grain inhibitors Cr₃C₂ and Ta C are oxidized by tungsten oxides during the sintering process, and the oxidation products are reduced at 800-1 050 ℃, which has a significant impact on the sintering process. These findings can provide guidance for the optimization of sintering processes.更多还原