Oxidation-enhanced wear behavior of WC-FeAl cutting tools used in dry machining oxygen-free copper bars

The wear response of tungsten carbide-iron aluminide (WC-FeAl) cutting tools was compared to that of conventional cemented carbide (WC-Co) tools when dry machining oxygen-free copper (Cu) round bars. Using flank wear width as a metric, it was found through machining tests that WC-FeAl cutting tools...

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Bibliographic Details
Published in:Wear 2017-03, Vol.374-375, p.104-112
Main Authors: Furushima, R., Shimojima, K., Hosokawa, H., Matsumoto, A.
Format: Article
Language:English
Subjects:
Carbide tools
Catalysis
Cemented carbides
Cobalt
Copper
Cutting parameters
Cutting tools
Cutting wear
Dry machining
Ferrous alloys
Intermetallic compounds
Iron aluminide
Iron aluminides
Oxidation
Oxidation resistance
Round bars
Tool wear
Tungsten carbide
Wear resistance
Wear-resistant property
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Summary:The wear response of tungsten carbide-iron aluminide (WC-FeAl) cutting tools was compared to that of conventional cemented carbide (WC-Co) tools when dry machining oxygen-free copper (Cu) round bars. Using flank wear width as a metric, it was found through machining tests that WC-FeAl cutting tools exhibited longer lifetimes (30% longer) than WC-Co ones with the same cutting distance. It was proposed that this finding resulted from the difference in oxidation resistance of binder materials (Co versus FeAl) against Cu. At the estimated temperature for cutting edge, Co was oxidized but FeAl was not. Furthermore, the oxidation of Co was enhanced with the presence of Cu which was not oxidized in itself. This apparent catalytic action by Cu was not seen in the case of FeAl. It was concluded that the tribo-oxidation characteristics of WC-FeAl cutting tools make them more effective for machining pure Cu than tools containing Co binders alone. [Display omitted] •Wear properties of two kinds of cutting tools against pure copper are compared.•One is WC-Co cutting tool and the other is WC-FeAl one.•WC-FeAl cutting tool exhibited longer lifetime than WC-Co one.•This result concerns the difference in binder material oxidation with pure cooper.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2017.01.019