NDLI: Experimental investigation of surface integrity in finish dry hard turning of hardened tool steel at different hardness levels

Content Provider	Springer Nature Link
Author	Tang, Linhu Gao, Chengxiu Huang, Jianlong Shen, Hao Lin, Xiaojun
Copyright Year	2014
Abstract	In this paper, the influences of cutting speed, depth of cut, feed, workpiece hardness (51, 55, 58, 62, and 65 ± 1 HRC), and nose radius on surface integrity in finish dry hard turning (FDHT) of the hardened tool steel AISI D2 by utilizing the polycrystalline cubic boron nitride (PCBN) inserts were experimentally investigated. Experimental results showed that the ploughing effect, serious squeeze, and elastic deformation have more significant on the surface roughness than those black fusion welding materials and side flows, and the surface roughness values are in the range of 0.34–0.86 μm between 150- and 301-m/min cutting speeds and totally attains a surface finish of grinding. The surface roughness is not very sensitive to the depth of cut in the range from 0.10 to 0.25 mm. The “residual cutting” materials, material plastic deformation, and even cohesion in the machined surface and cold welding effect do occur and hence influence on the surface integrity. The tiny grooves, severe plastic flow, and extensive material flows at lower feeds have significant influence on the surface integrity. The subsurface damages produced by the turning process also do occur and become severer at the larger feeds due to the localized stretch, plastic deformation, and even dilacerations of subsurface material induced by the friction from the tool flank face. The thermal softening, serious material side flows, and squeezing have significant effect on surface integrity when FDHT of the hardened tool steel AISI D2 at different hardness levels. And the heat effect is greater than the geometry effect as the nose radius attains a certain value.
Starting Page	1655
Ending Page	1669
Page Count	15
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	77
Issue Number	9-12
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2014-11-16
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	FDHT Hardened tool steel Workpiece hardness Surface roughness Surface morphology Industrial and Production Engineering Production/Logistics/Supply Chain Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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