Microstructural evolution and development of mechanical properties of spark plasma sintered WC–Co cemented carbides for machine parts and engineering tools

• Autorzy: Garbiec D. , Siwak P.

Identyfikatory

DOI

10.1016/j.acme.2018.10.004

• Języki publikacji: EN

Abstrakty

EN

WC–Co, WC–Co–Cr3C2 and WC–Co–TaC–NbC cemented carbides were spark plasma sintered and the microstructure and main mechanical properties of the obtained specimens were investigated. A series of WC–6Co cemented carbides was heated to the sintering temperature of 1400 °C at 200 and 400 °C/min at compacting pressures of 50 and 60 MPa. It was shown that the specimens spark plasma sintered at 400 °C/min and at 60 MPa possess the best mechanical properties. These parameters were applied for sintering WC–6Co cemented carbides with addition of grain growth inhibitors such as Cr3C2 and TaC–NbC. The influence of the grain growth inhibitors content was studied. The X-ray diffraction test results show that decarburization of the WC phase occurred and carbon deficient W2C and η (Co3W3C, Co6W6C) phases were formed during spark plasma sintering, wherein an increase in compacting pressure from 50 to 60 MPa results in a diminution in the carbon diffusion processes. The mechanical properties of the cemented carbides were defined. The best ratio of hardness and fracture toughness was obtained for WC–6Co–1Cr3C2: hardness was 1808 ± 19 HV30 and fracture toughness was 10.17 ± 0.27 MPa m1/2.

Słowa kluczowe

EN

cemented carbides; spark plasma sintering; microstructure; mechanical properties

PL

węgliki spiekane; mikrostruktura; właściwości mechaniczne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 1
• Strony: 215--223
• Opis fizyczny: Bibliogr. 44 poz., rys., tab., wykr.

Twórcy

autor

Garbiec D.

• Metal Forming Institute, 14 Jana Pawla II Street, 61-139 Poznan, Poland

autor

Siwak P.

• Poznan University of Technology, 5 Marii Sklodowskiej–Curie Square, 60-965 Poznan, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)