Comparative investigation towards machinability improvement in hard turning using coated and uncoated carbide inserts： part Iexperimental investigation  

作　　者：Ramanuj Kumar Ashok Kumar Sahoo Purna Chandra Mishra Rabin Kumar Das 

机构地区：[1]School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar,Odisha 751024, India

出　　处：《Advances in Manufacturing》2018年第1期52-70,共19页先进制造进展（英文版）

摘　　要：The investigation of low cost uncoated andcoated carbide insert in the hard turning of hardened AISID2 steel （≥55 HRC） will definitely open up a new arena asan economical alternative suitable to industrial machiningsectors. Thus, this paper reports the comparative machin-ability assessment for the hard turning of AISI D2 steel（（55 ± 1） HRC） by coated and uncoated carbide insert in adry environment. Micro hardness and abrasion tests werecarried out to assess resistance capability against wear. Theabove test results confirmed the greater wear resistanceability of AIaO3 coated carbide insert over uncoated car-bide. Based on the extensive investigation of comparativemachinability, the coated carbide insert （TiN-TiCN-A12O3）outperformed the uncoated carbide insert with regard tosurface roughness, flank wear, chip-tool interface temper-ature, and chip morphology. Abrasion and diffusion wereobserved as the principal tool wear mechanisms in theinvestigated range. The uncoated carbide failed completelydue to the severe chipping and quick dulling of the cuttingedge, which led to its unsuitability for machining hardenedsteel.

关 键 词：Coated and uncoated carbide Hard turning Machinability Flank wear Surface roughness Chipmorphology Cutting temperature 

分 类 号：TB2[一般工业技术—工程设计测绘]