Investigation of H13 Alloy Cutter Behaviour for Hard Rock Tunneling Applications

Abstract:

The current paper first analyzed the degradation mechanisms of the worn disc cutter made of forged H13 chromium alloy for hard rock tunneling applications. The paper investigated subsequently the mechanical properties of H13 to have a better understanding of the degradation mechanisms. Hardness tests were carried out on different positions on a cutter. Tensile tests and fracture toughness were carried out to investigate temperature effects. The test results showed that the material has a high wear resistance and a good temperature resistance, but its quasi brittle behavior and the residual stress effect (due to the cutting process) is critical for the chipping damage of the disc cutter.

• Periodical: Applied Mechanics and Materials (Volumes 754-755)
• Pages: 849-853
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.754-755.849
• Online since: April 2015
• Authors: Hieu Hoang*, Rune Østhus, Hans Lange, Eivind Grøv, Steve Smading
• Keywords: Disc Cutter Degradation, H13, TBM, Tests

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