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Influence of sinter...
Influence of sintering parameters on the mechanical performance of PM steels pre-alloyed with chromium
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- Bergman, Ola (författare)
- Research and Development, Höganäs AB
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- Lindqvist, Björn (författare)
- Tech Center, Höganäs (China) Ltd., Qingpu, Shanghai
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- Bengtsson, Sven (författare)
- Research and Development, Höganäs AB
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Research and Development, Höganäs AB Tech Center, Höganäs (China) Ltd, Qingpu, Shanghai (creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Materials Science Forum. - 0255-5476 .- 1662-9752. ; 534-536, s. 545-548
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.4...
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Abstract
Ämnesord
Stäng
- Powder grades pre-alloyed with 1.5-3 wt% chromium are suitable for PM steel components in high performance applications. These materials can be successfully sintered at the conventional temperature 1120 degrees C, although well-monitored sintering atmospheres with low oxygen partial pressures (< 10(-17)-10(-18) atm) are required to avoid oxidation. Mechanical properties of the Cr-alloyed PM grades are enhanced by a higher sintering temperature in the range 1120-1250 degrees C, due to positive effects from pore rounding, increased density and more effective oxide reduction. A material consisting of Astaloy CrM, which is pre-alloyed with 3 wt% Cr and 0.5 wt% Mo, and 0.6 wt% graphite obtains an ultimate tensile strength of 1470 MPa combined with an impact strength of 31 J at density 7.1 g/cm(3), after sintering at 1250 degrees C followed by cooling at 2.5 degrees C/s and tempering.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- PM steel
- chromium
- sintering atmosphere
- sintering temperature
- oxide reduction
- Materials science
- Teknisk materialvetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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