Phase Studies in WC-Stainless Steel AISI 347 Hardmetal System with Graphite Addition

Abstract:

In this study, WC-stainless steel AISI 347 hardmetal system was produced to replace WC-Co hardmetal which uses the expensive, toxic and depleted resource Co. WC, stainless steel AISI 347 and graphite powder mixture were milled in a planetary mill under argon atmosphere using a stainless steel container and balls. Carbon was added in amounts ranging from 0 wt% until 4 wt% into the composition to avoid unwanted η (Fe₃W₃C) phase. As-milled powder was compacted at 300 MPa and sintered in a tube furnace at 1350°C. ɳ phase was detected in compositions with 0 and 1 wt% C addition. For 2 wt% C addition, no η (Fe₃W₃C) phase formation was identified. However, the η phase was detected for compositions containing 3 and 4 wt% C. Maximum hardness was achieved due to the absence of η phase.

• Periodical: Advanced Materials Research (Volume 1024)
• Pages: 239-242
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1024.239
• Online since: August 2014
• Authors: Zuhailawati Hussain*, Emee Marina Salleh, Tran Bao Trung, Zainal Arifin Ahmad
• Keywords: Cutting Tool Materials, Hardmetal, Sintering, Stainless Steel Binder, Tungsten Carbide

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