涂层刀具低温铣削SiCp/Al复合材料表面质量研究

在加工过程中,相反的两相特性增加了 SiCp/Al复合材料加工难度,难以获得良好的表面质量.为了提高其切削性能,本文开展20vol％SiCp/Al复合材料铣削加工试验研究,比较常温和低温条件下TiAlN涂层和TiAlSiN涂层两种铣刀的切削性能.结果表明,在低温条件下,两种刀具的切削力增加,铣削后表面铝基体的开裂及剥落...

Study on surface quality of SiCp/Al composites milled by coated tools at low temperature

Silicon carbide particle reinforced aluminum matrix composites play an important role in aviation, aerospace, electronics, automobile, and other fields due to its excellent mechanical properties. In order to improve its cutting performance, the liquid nitrogen spray experimental device was used to carry out milling experiments. The cutting force, surface integrity, and chip morphology were studied to explore the machining quality of TiAlN coating and TiAlSiN coating milling cutter under normal and low temperature conditions. The results show that when milling at low temperature, the cutting force of the two tools increases, and the surface defects such as aluminum matrix cracking and spalling are significantly improved, and the machined surface damage and roughness are reduced. Low temperature milling can obtain better surface quality. In addition, the cutting force of TiAlSiN coated milling cutters is lower than that of TiAlN coated milling cutters under normal temperature and low temperature. The surface integrity and chip morphology of TiAlSiN coated milling cutters are better than those of TiAlN coated milling cutters under low temperature conditions.