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Control of carbon content in WC-Co hardmetal by heat treatment in reducing atmospheres containing methane.

Parker, Simon, Whiting, Mark and Yeomans, Julie (2017) Control of carbon content in WC-Co hardmetal by heat treatment in reducing atmospheres containing methane. International Journal of Refractory Metals and Hard Materials, 66. pp. 204-210.

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Abstract

Pressed WC-Co hardmetal compacts of two different compositions, 6 and 10 wt.% Co, were heat treated under flowing atmospheres of nitrogen, hydrogen and methane at temperatures from 500 to 900 °C prior to sintering under argon. Microstructural examination showed excessive carburisation up to 2.5 mm into the compacts with regions most exposed to heat treatment atmospheres showing greatest carburisation. η-phase was present in the 6 wt.% Co samples heat treated at low temperatures without methane but was not present with heat treatment temperatures of 700 °C or above with methane present. The hardness of both materials was significantly lower in highly carburised regions, highlighting the need for careful control of heat treatment parameters.

Item Type: Article
Subjects : Mechanical Engineering Sciences
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Parker, Simons.r.parker@surrey.ac.ukUNSPECIFIED
Whiting, MarkM.Whiting@surrey.ac.ukUNSPECIFIED
Yeomans, JulieJ.Yeomans@surrey.ac.ukUNSPECIFIED
Date : 18 March 2017
Identification Number : 10.1016/j.ijrmhm.2017.02.009
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 24 Feb 2017 12:23
Last Modified : 06 Jul 2017 09:00
URI: http://epubs.surrey.ac.uk/id/eprint/813632

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