Wear behavior in turning high hardness alloy steel by CBN tool

Lin, Hung-Yeh; Liao, Yi‐Hung; Wei, C. M.

doi:10.1016/j.wear.2007.06.006

Cited by 78 publications

(39 citation statements)

References 18 publications

(25 reference statements)

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“…The VB appears to be decreasing with the increase in cutting speed, Figure 3. It appears that at low cutting speed the binder of the hard particles present in cutting tool is easily removed from the substrate due to high cutting force arising from less softening of work material as a result of low cutting temperature, and therefore abrasion dominates tool wear (Lin et al, 2008). When the cutting speed is increased, a protective layer resulting from the diffusion of the bond material of the cutting tool forms on the tool-chip interface as revealed from optical and SEM micrographs of worn out insert, in Figure 4.…”

Section: Flank Wearmentioning

confidence: 99%

Optimisation of tool wear during hard turning of AISI-H11 steel using TiN coated CBN-L tool

Dureja

2012

IJMMM

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In the present investigation, an attempt has been made to develop and optimise models for tool wear (flank and crater wear) in terms of cutting speed, feed rate, depth of cut and work hardness based on experimentally collected data by applying RSM (response surface methodology -Box Behnken) design of experiments during hard turning of AISI-H11 steel with TiN coated CBN-L tool. The influence of input parameters on the response factors viz. flank wear, crater wear were investigated by applying ANOVA and through 3D-factor interaction graphs in RSM. The experimental data points were observed to be best fitted by non-linear quadratic models for both the response factors. All the independent factors were found to be statistically significant in determining crater wear, while cutting speed and feed were the dominant factors affecting flank wear. Numerical optimisation using desirability function was used for multiple response factors optimisation. The confirmation experiments carried out to check the validity of developed models predicted response factors with less than 5% error.Reference to this paper should be made as follows: Dureja, J.S. (2012) 'Optimisation of tool wear during hard turning of AISI-H11 steel using TiN coated CBN-L tool', Int.

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Section: Flank Wearmentioning

confidence: 99%

Optimisation of tool wear during hard turning of AISI-H11 steel using TiN coated CBN-L tool

Dureja

2012

IJMMM

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“…Lin et al [21] reported on variations of wear behaviour with different cutting speeds, and even though the flank was considered significant differences were reported. It was shown that with an increase of cutting speed, the cutting temperature increased and as a result the workpiece material softened.…”

Section: Introductionmentioning

confidence: 99%

An in-depth investigation of the cutting speed impact on the degraded microstructure of worn PCBN cutting tools

Angseryd

Andrén

2011

Wear

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The impact of an increased cutting speed on the degradation of a low content polycrystalline cubic boron nitride (PCBN) tool material is investigated by advanced microscopy techniques. The locally affected microstructure of worn PCBN cutting tools, after dry hard turning, is studied by high precision in-situ lift-out cross sections taken from across the crater, formed on the rake face. The cross sections are studied with scanning electron microscopy, transmission electron microscopy (TEM) with electron energy loss spectroscopy and, primarily, energy filtered TEM.Advanced analysis techniques are crucial to illustrate the degradation mechanisms taking place locally at micro-and nanometre levels during the machining operation. Results show that a higher cutting speed drastically affects the wear surface of the cutting edge. While an adherent layer, consisting of elements from the workpiece material, covers practically the whole wear surface at a lower cutting speed, it is only partially distributed at a higher cutting speed. Results also show significant differences in the local microstructure of the affected worn zone with an increase in cutting speed. The chemical degradation will go from tool-workpiece interface wear with smooth wear surfaces and almost no interaction with material below the wear surface at lower cutting speed to a severe penetration into the tool material by partially oxidised Fe-rich features at higher cutting speed. The more aggressive degradation behaviour at the higher cutting speed is also more localised. Single chemically worn cBN grains are for example shown. The dominating wear mechanism is shown to be chemical degradation, which accelerates with a higher cutting speed. The cBN phase is more affected than the major matrix phase, Ti(C,N). Keywords

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“…There is a considerable reduction in the width of the contact between the segments (Ben Salem et al, 2012;Lin et al, 2008).…”

Section: Chip Morphologymentioning

confidence: 99%

“…There exists during saw-tooth chip formation a catastrophic failure within the primary shear zone of the hard materials, which is attributed to either cyclic crack initiation and propagation or to the occurrence of a thermo-plastic instability (Barry and Bryne, 2002). Lin et al (2008) investigated the turning of AISI 4340 using low content CBN tool. They observed continuous chip formation at low cutting speed, and at high cutting speed, saw tooth type was obtained.…”

Section: Introductionmentioning

confidence: 99%

Chip Formation Characterisation and Tem Investigation of Worn PcBN Tool during Hard Turning

Sobiyi

Sigalas

2015

Machining Science and Technology

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2 The influence of cutting conditions on the chip formation during hard turning of martensitic AISI 440B stainless steel and microstructure of worn PCBN cutting tool using situ lift-out technique, observed using scanning electron microscope (SEM) and transmission electron microscope (TEM) was experimentally studied. The increasing cutting speed affects the formation of shear, localized chips with rapid increase in chip velocity and degree of segmentation at cutting speeds higher than 200 m/min. The SEM and TEM study showed evidences of strong chemical affinity between the work material and PCBN tool. Fe from the work material was found in the vicinity of TiC and AlB grains of the tool with TiC having greater affinity for Fe.

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Wear behavior in turning high hardness alloy steel by CBN tool

Cited by 78 publications

References 18 publications

Optimisation of tool wear during hard turning of AISI-H11 steel using TiN coated CBN-L tool

Optimisation of tool wear during hard turning of AISI-H11 steel using TiN coated CBN-L tool

An in-depth investigation of the cutting speed impact on the degraded microstructure of worn PCBN cutting tools

Chip Formation Characterisation and Tem Investigation of Worn PcBN Tool during Hard Turning

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