Pack Boronizing of a Co-Cr-W-C Alloy

Yeo, M.H.; Kim, Seung Jin; Bang, Seong Hwan; Bae, Dae Yeal; Han, Kwan Hee

doi:10.4028/0-87849-463-4.1357

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2015

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“…[7][8][9][10] Boronizing treatment can be applied on most ferrous materials and some non-ferrous materials, nickel alloys, Co alloys, titanium alloys, refractory metals and sintered carbides and cermets. [11][12][13][14][15] In fact, for practical applications, the formation of a monophase (Fe 2 B) with saw-tooth morphology is more desirable than a dualphase layer composed of FeB and Fe 2 B. [16] Although the boron-rich FeB phase is harder, it is more brittle than the iron sub-boride, Fe 2 B phase.…”

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confidence: 99%

Characterization and Rockwell-C adhesion properties of chromium-based borided steels

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2015

Journal of Adhesion Science and Technology

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In this study, adhesion properties of boride layers formed on the surface of AISI 52100, AISI 5140, AISI 440C, AISI 420 and AISI 304 steels were investigated. Boronizing treatment was carried out in Ekabor-II powders at the temperatures of 850 and 950°C for 4 h. The properties of boride layers were evaluated by optical microscopy, SEM, X-ray diffraction and micro-Vickers hardness tester. The Daimler-Benz Rockwell-C adhesion test was used to assess the adhesion of boride layers. Test result showed that adhesion of boride layers depended on the dual-phase structure. The stresses at the FeB/Fe 2 B interphase caused delamination failure and poor interphase adhesion with increase in the depth of hard and brittle FeB-based layer.

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