Contact fatigue strength of 41CrAlMo7 grade steel by nitriding and shot-peening treatment
This paper describes the method of raising contact fatigue strength, designated for application in the manufacture of gears. Investigations were carried out on 41CrAlMo7 grade steel (closest equivalent: Nitralloy 135M) following quenching and tempering, nitriding and double shot-peening. Special...
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| Date: | 2012 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Фізико-механічний інститут ім. Г.В. Карпенка НАН України
2012
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| Series: | Фізико-хімічна механіка матеріалів |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/135817 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Contact fatigue strength of 41CrAlMo7 grade steel by nitriding and shot-peening treatment / A. Nakonieczny, G. Monka // Фізико-хімічна механіка матеріалів. — 2012. — Т. 48, № 6. — С. 24-29. — Бібліогр.: 5 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | This paper describes the method of raising contact fatigue strength, designated for application
in the manufacture of gears. Investigations were carried out on 41CrAlMo7 grade
steel (closest equivalent: Nitralloy 135M) following quenching and tempering, nitriding
and double shot-peening. Special emphasis should be placed on the combination of the
nitriding and shot-peening technologies. Both nitriding and shot-peening have been significantly
modified and differ from the classical processes. Nitriding was carried out in such
a way as to prevent the formation on the surface of a compound layer, composed of nitrides
ε and γ. Shot-peening was carried out as a double stage operation, employing a change
of parameters. As the result of combining the modernized processes, a new technology
was developed, allowing the attaining of a contact fatigue limit that is comparable to that
obtained by carburizing or induction hardening. The paper describes the methodology and
the experimental work, as well as the achieved values of contact fatigue strength. Other
surface parameters are also given, such as roughness, hardness, state and distribution of
residual stresses. |
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