硬质合金高温性能对碳纤维复合材料切削加工的影响研究

摘要

制备了主元素一致的两种WC-Co基细晶粒硬质合金材料,材料A添加有微量TaC(NbC),材料B未添加微量元素.采用高温维氏硬度计对两种硬质合金材料进行高温硬度测试,并用这两种材料制成的菱齿立铣刀对碳纤维复合材料进行铣削加工.结果表明:硬质合金菱齿立铣刀铣削碳纤维复合材料时,磨粒磨损是刀具磨损的主要原因;硬质合金材料A的高温硬度高于材料B;在相同的使用条件下,材料A的耐磨性能比材料B好,制成的刀具使用寿命更长,更适合碳纤维复合材料的切削加工.%To study the effect of high temperature performance of carbide on CFRP cutting,two kinds of WC-Co based fine grain carbide materials with same main elements were prepared.The material A was added with trace TaC(NbC),and materials B did not add trace elements.High temperature hardnesses of two kinds of carbide materials were testing by high temperature Vickers hardness tester,and the CFRP was milling processed by the fine-cross-nick routers that were made of these two materials.The results showed that abrasive wear was the main reason of tool wear when the CFRP was milling processed by the fine-cross-nick router.The high temperature hardness of material A was higher than material B.Under the same using conditions,the wear resistance of material A was better than that of material B,the tool made of material A had a longer tool life,and more suitable for CFRP machining.