文献类型：期刊文献

英文题名：Machining performance and wear mechanism of PVD TiAlN/AlCrN coated carbide tool in precision machining of selective laser melted Ti6Al4V alloys under dry and MQL conditions

作者：Ni, Chenbing[1];Wang, Xuezhao[1];Zhu, Lida[2];Liu, Dejian[1];Wang, Youqiang[1];Zheng, Zhongpeng[3];Zhang, Ping[4]

机构：[1]Qingdao Univ Technol, Sch Mech & Automot Engn, Qingdao 266525, Peoples R China;[2]Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China;[3]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China;[4]Guangdong Ocean Univ, Sch Mech & Power Engn, Zhanjiang 524088, Peoples R China

年份：2022

卷号：79

起止页码：975

外文期刊名：JOURNAL OF MANUFACTURING PROCESSES

收录：SCI-EXPANDED(收录号：WOS:000836192100001)、、EI(收录号：20222412213310)、Scopus(收录号：2-s2.0-85131463875)、WOS

基金：This research work was supported by the National Natural Science Foundation of China (Grant No. 51975112 and Grant No. 51575289). The authors are very grateful to Prof. Lu Wen Feng and Prof. Wang Hao from the National University of Singapore (NUS) for their guidance and assistance in the experiment.

语种：英文

外文关键词：Precision machining performance; Tool wear mechanism; Selective laser melted Ti6Al4V alloy; Dry and MQL conditions; Laser scanning schemes

外文摘要：Selective laser melting (SLM) shows significant advantages in near net-shaped manufacturing of metal components with complex geometries. However, subsequent post-machining is usually conducted for the improvement of surface quality and dimensional accuracy of SLMed parts. This paper focuses on the precision machining performance of SLMed Ti6Al4V alloys and wear mechanism of multi-layered TiAlN/AlCrN coated carbide tools. The influence of laser scanning schemes, machining surfaces as well as lubrication conditions (dry and MQL) on machinability of SLMed Ti6Al4V alloys in terms of cutting force, surface quality, tool wear morphology and wear mechanism was evaluated and analyzed. The results indicate that, the largest difference in cutting force and surface roughness between the top and front surfaces under dry cutting occurred in 0 degrees-linear SLMed Ti6Al4V alloy due to its prominent anisotropic features. Compared to the surface quality in dry cutting, the improvement of surface roughness of SLMed Ti6Al4V alloys under MQL is up to 82.2%, which was significantly superior to the 59.2% improvement of annealed titanium alloy. Because of the improvement of tribological properties between the flank and machined surface, adhesive wear becomes the primary wear mechanism of TiAlN/AlCrN coated carbide tools under MQL during precision machining of SLMed Ti6Al4V alloys, while abrasive wear is the main wear mechanism under dry cutting. In addition, the ductility and integrity of ribbon chips derived from SLMed Ti6Al4V alloys are superior to those of chips originating from annealed titanium alloy, where significant tearing and cracking occurred in the chips of annealed titanium alloy.