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http://dx.doi.org/10.7736/KSPE.2014.31.9.799

Wear Characteristics of CBN Tools on Hard Turning of AISI 4140  

Yang, Gi-Dong (Department of Manufacturing System R&D, Korea Institute of Industrial Technology)
Park, Kyung-Hee (Department of Manufacturing System R&D, Korea Institute of Industrial Technology)
Lee, Myung-Gyu (Department of IT Converged Process R&D, Korea Institute of Industrial Technology)
Lee, Dong Yoon (Department of IT Converged Process R&D, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.31, no.9, 2014 , pp. 799-804 More about this Journal
Abstract
Hard turning is a machining process for hardened materials with high surface quality so that grinding process can be eliminated. Therefore, the hard turning is capable of reducing machining time and improving productivity. In this study, hardened AISI4140 (high-carbon chromium steel) that has excellent yield strength, toughness and wear resistance was finish turned using CBN tools. Wear characteristics of CBN tool was analyzed in dry and MQL mixed with nano-particle (Nano-MQL). The dominant fracture mechanism of CBN tool is diffusion and dissolution wear on the rake surface resulting in thinner cutting edge. Abrasive wear by hard inclusion in AISI4140 was dominant on the flank surface. Nano-MQL reduced tool wear comparing with the dry machining but chip evacuation should be considered. A cryogenically treated tool showed promising result in tool wear.
Keywords
Hard Turning; CBN Tool; Tool Wear; Nano-MQL; Cryogenically Treated;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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