Peculiarities of hardmetals wear in blanking of sheet metals

Klaasen, H.; Kübarsepp, Jakob; Eigi, R.

doi:10.1016/j.triboint.2005.01.041

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…Influence of thin PVD coatings on the blanking performance differs from that of PVD coatings on the adhesive wear performance, i.e., an obvious effect of coatings on adhesive wear resistance was found (Figs 3 and 4). It also contradicts to the results of performance in blanking and in adhesive wear conditions of carbide composites (WC-Co hardmetals, TiC-base cermets), demonstrating a good correlation between performance in banking and adhesive wear resistance [ 12 ]. Such a result can be explained by differences in the working conditions during adhesive wear tests (constant loading conditions, turning of soft steel at low speed) and sheet metal blanking (cyclic loading fatigue conditions accompanied by adhesive wear as well as by abrasion) [ 15 ].…”

Section: Performance In the Blanking Of Sheet Steelcontrasting

confidence: 68%

“…Such testing conditions simulate mainly adhesive nature of wear in blanking of soft steel ( Fig. 1) [ 12 ]. In previous studies an excellent correlation between the adhesive wear resistance and the wear of blanking dies was revealed [ 12,13 ].…”

Section: Testing Conditionsmentioning

confidence: 94%

“…1) [ 12 ]. In previous studies an excellent correlation between the adhesive wear resistance and the wear of blanking dies was revealed [ 12,13 ]. The wear resistance was determined as the length of the cutting path L 0.3 when the height of the wear land at the specimen (cutting tool) nose achieved 0.3 mm.…”

Section: Testing Conditionsmentioning

confidence: 95%

“…The functional performance (testing in blanking conditions) of the tool steel S390 (the best grade in adhesive wear tests) with thin PVD coatings was studied in the same conditions as the blanking performance of carbide composites in our previous research [ 12,13 ]. The results of functional tests are presented in Figs 7 and 8 as wear contours (side wear on the depth H from the cutting edge of a tool) after service time N = 0.4 × 10 6 strokes.…”

Section: Performance In the Blanking Of Sheet Steelmentioning

confidence: 99%

See 3 more Smart Citations

Wear performance of PVD coated tool steels

Tshinjan¹,

Klaasen²,

Kübarsepp³

et al. 2012

Estonian J. Eng.

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The paper describes the performance of high alloy tool steels coated by PVD techniques. Performance evaluation was based on the wear resistance in the conditions of prevalence of adhesion and on tool wear (durability) in the conditions of blanking of electrotechnical sheet steel. Hardmetal (WC-15% Co) was used as a primary standard material. It is shown that adhesive wear resistance depends both on the composition of the PVD coating and on that of the tool material to be coated -steels with higher adhesive wear resistance ensure also a higher strengthening effect of the surface. Sharpening of specimens (cutting tools) -removal of coating at the face zone of the tool by grinding -revealed the difference in the efficiency of the coating in different zones of the tool. In terms of durability, thin PVD coatings do not enable improvement of the performance of sheet metal blanking tools (dies, punches). No correlation between durability in blanking and adhesive wear resistance was revealed. In terms of durability prognostication, alloys' (tool steels, hardmetals, cermets) adhesive wear resistance enables tool life assessment only when materials of similar nature (steels, carbide composites) are compared.

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Section: Performance In the Blanking Of Sheet Steelcontrasting

confidence: 68%

Section: Testing Conditionsmentioning

confidence: 94%

Section: Testing Conditionsmentioning

confidence: 95%

Section: Performance In the Blanking Of Sheet Steelmentioning

confidence: 99%

See 2 more Smart Citations

Wear performance of PVD coated tool steels

Tshinjan¹,

Klaasen²,

Kübarsepp³

et al. 2012

Estonian J. Eng.

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show abstract

“…Application of tungsten-free materials is relevant due to the shortage and high price of tungsten. The main mechanical properties of TiC-based cermets have been closely observed and investigated in recent decades to reveal their prospects in metalworking (cyclic conditions -turning, milling, and blanking) [1,2] considering that abrasive and adhesive wear resistance of TiC-Fe/Ni cermets is higher than that of WC-Co hardmetal [3,4].…”

Section: Introductionmentioning

confidence: 99%

Fatigue mechanics of TiC-based cemented carbides

Sergejev

Preis

Hussainova

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part J:

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The aim of this work was to investigate fracture and fatigue behaviour of TiC-Ni/Fe cermets under monotonic and cyclic loading.The fracture toughness K Ic was determined by a conventional testing method (using single edge notched beam) and evaluated by an indentation technique (indentation fracture toughness (IFT)). Results from both experimental routines were analysed and compared with the reference hardmetal -WC-10 wt% Co. As the result, a novel sequence for estimation of the IFT for TiC-and WC-based cemented carbides is presented.The transverse rupture strengths R TZ and fatigue strengths σ f at a given life (10 7 cycles) were obtained by the testing of unnotched and notched specimens with the three-point bending scheme. Considering that the fatigue lifetime of cemented carbides is given by the subcritical crack growth of pre-existing defects, a linear elastic fracture mechanics approach is attempted to assess fatigue life-fatigue crack growth relationships for the studied materials.The reliability of used fatigue mechanics approach is proved by the excellent agreement observed between estimated and experimentally determined values for fracture toughness and fatigue strength of the investigated materials.

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An experimental analysis of effects of various material tool’s wear on burr during generator sheets blanking

Mucha

2010

Int J Adv Manuf Technol

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Peculiarities of hardmetals wear in blanking of sheet metals

Cited by 8 publications

References 12 publications

Wear performance of PVD coated tool steels

Wear performance of PVD coated tool steels

Fatigue mechanics of TiC-based cemented carbides

An experimental analysis of effects of various material tool’s wear on burr during generator sheets blanking

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