Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials

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Process of surface micro melting and polishing on 3Cr2Mo steel with scanning electron beam and its effect on the microstructure and properties of hardening layer

Authors
R. Wang, J.W. Yin, D.Q . Wei
Corresponding Author
R. Wang
Available Online July 2015.
DOI
10.2991/icimm-15.2015.297How to use a DOI?
Keywords
3Cr2Mo steel; scanning electron beam; micro melting and polishing; roughness; metallurgical structure; hardness
Abstract

Process of surface micro melting and polishing can reduce surface roughness so as to improve the surface mechanical properties. Process of surface micro melting and polishing on 3Cr2Mo steel is researched in this paper and the microstructure and properties of surface hardening layer are analyzed. The results show that surface roughness is reduced by 41.1% and surface average hardness is 724HV after the sample whose surface roughness is 1.472 m is processed by surface micro melting and polishing. The cross-section microstructure is composed of hardened zone, transition zone and matrix. The distribution of cross-section morphology of hardened zone is like "W"; The microstructures of hardened zone are composed of acicular martensite and lath martensite; The microstructures of transition zone are composed of cryptocrystalline martensite, residual austenite, troostite and tempered sorbite; The deepest hardened zone reaches about 520 m; The change of microhardness (650HV~715HV) is not obvious which is 2.26~2.4 times as hard as matrix.

Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials
Series
Advances in Engineering Research
Publication Date
July 2015
ISBN
10.2991/icimm-15.2015.297
ISSN
2352-5401
DOI
10.2991/icimm-15.2015.297How to use a DOI?
Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

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TY  - CONF
AU  - R. Wang
AU  - J.W. Yin
AU  - D.Q . Wei
PY  - 2015/07
DA  - 2015/07
TI  - Process of surface micro melting and polishing on 3Cr2Mo steel with scanning electron beam and its effect on the microstructure and properties of hardening layer
BT  - Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials
PB  - Atlantis Press
SP  - 1605
EP  - 1610
SN  - 2352-5401
UR  - https://doi.org/10.2991/icimm-15.2015.297
DO  - 10.2991/icimm-15.2015.297
ID  - Wang2015/07
ER  -