Grinding effects on surface integrity and mechanical strength of WC-Co cemented carbides
2014 (English)In: 2ND CIRP CONFERENCE ON SURFACE INTEGRITY (CSI), ELSEVIER SCIENCE BV , 2014, Vol. 13, 257-263 p.Conference paper (Refereed)
In this study, the correlation existing among grinding, surface integrity, and flexural strength is investigated for WC-Co cemented carbides (hardmetals). A fine-grained WC-13 wt % Co grade and three different surface conditions: (1) ground, (2) mirror-like polished (reference), and (3) ground plus high-temperature annealed, are investigated. Surface integrity and mechanical characterization is complemented with fractography. The grinding strongly affects both surface integrity and flexural strength. During grinding, a damaged thin layer together with high compressive residual stresses is introduced. The layer results in considerable strength enhancement compared to the reference polished surface condition. Fractography reveals that the improved strength mainly stems from grinding-induced changes on effective location, from surface into subsurface levels, of the strength-controlling flaw.
Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2014. Vol. 13, 257-263 p.
, Procedia CIRP, ISSN 2212-8271 ; 13
Grinding; Surface integrity; Cemented Carbides
Manufacturing, Surface and Joining Technology
IdentifiersURN: urn:nbn:se:liu:diva-122089DOI: 10.1016/j.procir.2014.04.044ISI: 000360720300044OAI: oai:DiVA.org:liu-122089DiVA: diva2:861941
2nd CIRP Conference on Surface Integrity (CSI)