标题：Performance Evaluation of Ultra-Fine Grain Carbide in High-Speed Milling of Ti=6Al-4V
作者：Li, Anhai; Zhao, Jun; Gao, Xinliang; Wang, Fuzeng
作者机构：[Li, Anhai; Zhao, Jun; Wang, Fuzeng] Shandong Univ, Sch Mech Engn, Key Lab High Efficiency & Clean Mech Manufacture, Jinan 250061, Peoples R China.; 更多
通讯作者地址：[Zhao, J]Shandong Univ, Sch Mech Engn, Key Lab High Efficiency & Clean Mech Manufacture, 17923 Jingshi Rd, Jinan 250061, Peoples R China.
来源：INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
关键词：Cutting tools; High speed milling; Microstructure; Hardmetals; Titanium; alloy
摘要：An ultra-fine grain carbide cutting tool material was fabricated by using Sinter-HIP technique. Four-tooth solid carbide end mills with a 20 mm diameter and a 0.8 mm corner-radius were manufactured and then coated with physical vapor deposition multilayer TiAlN and AlCrN coatings. Cutting performance of coated ultra-fine grain carbide end mills was investigated via high-speed wet milling tests on 77-6Al-4V alloy with a TiAlN coated fine grain end mill commercially available for comparison. The transient and progressive cutting forces during wet machining were measured and the chip morphologies were analyzed. The results of the milling tests revealed that the TiAlN coated ultra-fine grain solid carbide end mill exhibited longer tool life, smaller progressive cutting forces, and better broken chips than the TiAlN coated fine grain end mill with the same cutting condition. In addition, the multilayer TiAlN coated end mill achieved higher tool wear resistance than the multilayer AlCrN coated end mill. The longer tool life of the new coated ultra-fine grain solid carbide end mill should be attributed to the smaller grain size of the tool substrate material with higher hardness, higher transverse rupture strength, and better thermo-mechanical fatigue properties, as well as higher wear resistance of TiAlN coating.