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Measurement of the mass transfer coefficient at workpiece surfaces in heat treatment furnaces

Gao, Weimin, Kong, Lingxue, Long, John M. and Hodgson, Peter D. 2009, Measurement of the mass transfer coefficient at workpiece surfaces in heat treatment furnaces, Journal of materials processing technology, vol. 209, no. 1, pp. 497-505, doi: 10.1016/j.jmatprotec.2008.02.028.

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Title Measurement of the mass transfer coefficient at workpiece surfaces in heat treatment furnaces
Author(s) Gao, Weimin
Kong, LingxueORCID iD for Kong, Lingxue orcid.org/0000-0001-6219-3897
Long, John M.
Hodgson, Peter D.
Journal name Journal of materials processing technology
Volume number 209
Issue number 1
Start page 497
End page 505
Total pages 9
Publisher Elsevier SA
Place of publication Lausanne, Switzerland
Publication date 2009-01
ISSN 0924-0136
1873-4774
Keyword(s) mass transfer coefficient
measurement
uncertainty
sensitivity analysis
carburizing
heat treatment
Summary The mass (e.g. carbon) transfer coefficient at a workpiece surface is an important kinetic factor to control the heat treatment process of the workpiece and to evaluate heat treatment equipment. The coefficient can be calculated from the carbon concentration at the surface of a sample carburized in a carburizing furnace for a given time. Two common measurement methods which use a thin plate and employ a component as samples respectively are evaluated and compared for sensitivity and uncertainty. The comparison shows that the use of a component produces higher measurement precision and also has the advantage in measuring the carbon transfer coefficients at different treated positions. This method is then extended and discussed methodologically. Also two equations are proposed to calculate the carbon transfer coefficient and its uncertainty, respectively. This method is also applied to measure the carbon transfer coefficient in a fluidized bed heat treatment furnace.
Notes 2/6/10 SJD chge to affiliations. REFEREED XCHKD ULRICHS 24/3/10 SJD.
Language eng
DOI 10.1016/j.jmatprotec.2008.02.028
Field of Research 091099 Manufacturing Engineering not elsewhere classified
Socio Economic Objective 861202 Machined Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2008, Elsevier B.V
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022584

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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