摘要
聚晶金刚石(PCD)刀具的韧性较差,极少用于带有冲击性的断续切削加工,限制了其应用范围。为改良刀具性能,通过热处理工艺优化刀具基体,加固PCD和基体的结合,制成新型的PCD刀具。通过断续切削铝合金实验,分析新型刀具的使用寿命以及表面磨损状况。结果表明:刀具基体优化后,金刚石层与硬质合金基体之间的结合力提高,刀具抗冲击能力提高。新型刀具在切削128min后没有出现崩刃现象,其磨损量仍在可控范围,适用于断续切削生产。
Polycrystalline diamond（PCD）tools have poor thermal toughness,thus less used in interrupted machining with impact.To improve the performance of PCD tools,the substrate was heattreated to strengthen its bond with PCD and new PCD tools were made to test their life and surface wear after interrupted cutting aluminum alloy.The results indicate that modified substrates have better bond with diamond layer than the normal ones,thus improving the impact toughness of the tools.Tests show that there is no edge breakage on new PCD tools after cutting 128 min,while the wear condition is still acceptable.In conclusion,PCD tools with heat-treated substrate are suitable for interrupted cutting.
作者
苏彦宾
邵慧丽
武瑞阁
SU Yanbin;SHAO Huili;WU Ruige(Xin Yuan Superhard Material Products Co.,Ltd.,Zhecheng 476200,Henan,China)
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2018年第3期21-23,35,共4页
Diamond & Abrasives Engineering
关键词
预处理
钴扩散
切削力
刀具寿命
pre treatment
Co diffusion
cutting force
tool life
