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Processing and properties of sinter hardened Fe–Cr–Mo steels with admixed extra-fine nickel

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1179/1743290110Y.0000000009
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Affiliation
  1. National Research Council of Canada. NRC Industrial Materials Institute
FormatText, Article
SubjectChromium-molybdenum steels; extra-fine nickel; sinterhardening; hybrid steels; mechanical properties; cooling rate
Abstract
The processing and properties of chromium–molybdenum, powder metallurgy steels with admixed extra-fine nickel (XF Ni) were investigated. Prealloyed Fe–1·5Cr–0·2Mo powder was blended with different quantities of XF Ni, while a hybrid steel with lower Cr content was prepared by blending Fe–1·5Cr–0·2Mo and Fe–0·5Mo prealloyed powders, with additions of XF Ni and copper powders. These steels were compacted into different part shapes in order to evaluate the effect of part thickness on sinterhardening behaviour. These parts were also subjected to different cooling rates after sintering. This study showed that additions of XF Ni improve the compressibility, densification behaviour and mechanical properties of Cr–Mo steels. Furthermore, the properties of the hybrid steel were shown to be either equal to or greater than those of the reference material. Hardenability of all steels was sufficiently high such that part thickness was seen to have negligible impact. Higher cooling rates generally resulted in improved mechanical properties.
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  • Powder Metallurgy 54, no. 4 (1 July 2011).
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 53827
NPARC number18429097
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Record identifier6b35de3f-2271-49a3-845f-a45ef7f2d9f7
Record created2011-08-23
Record modified2020-04-21
Date modified: