Grinding effects on surface integrity and mechanical strength of WC-Co cemented carbides

被引：66
|
作者：
Yang, J. [1 ,2 ]
Oden, M. [2 ]
Johansson-Joesaar, M. P. [2 ,3 ]
Llanes, L. [1 ]
机构：
[1] Univ Politecn Cataluna, ETSEIB, CIEFMA Dept Ciencia Dels Mat & Engn Met, E-08028 Barcelona, Spain
[2] Linkoping Univ, Nanostruct Mat, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden
[3] SECO Tools AB, SE-73782 Fagersta, Sweden
来源：
2ND CIRP CONFERENCE ON SURFACE INTEGRITY (CSI) | 2014年 / 13卷
关键词：
Grinding; Surface integrity; Cemented Carbides; RESIDUAL-STRESS STATE; ADHESION STRENGTH; FRACTURE; DEFORMATION; HARDMETALS; DAMAGE;
D O I：
10.1016/j.procir.2014.04.044
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2014 The Authors. Published by Elsevier B.V.
引用
收藏
页码：257 / 263
页数：7
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