Surface integrity analysis when milling ultrafine-grained steels

This paper quantifies the effects of milling conditions on surface integrity of ultrafine-grained steels. Cutting speed, feed rate and depth of cut were related to microhardness and microstructure of the workpiece beneath machined surface. Low-carbon alloyed steel with 10.8 µm (as-received) and 1.7...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2012-02, Vol.15 (1), p.125-130
Main Authors: Rodrigues, Alessandro Roger, Balancin, Oscar, Gallego, Juno, Assis, Cleiton Lazaro Fazolo de, Matsumoto, Hidekasu, Oliveira, Fernando Brandão de, Moreira, Suzana Regina da Silva, Silva Neto, Otavio Villar da
Format: Article
Language:English
Subjects:
ENGINEERING, CHEMICAL
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
microhardness
microstructure
milling
surface integrity
ultrafine-grained steel
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Summary:This paper quantifies the effects of milling conditions on surface integrity of ultrafine-grained steels. Cutting speed, feed rate and depth of cut were related to microhardness and microstructure of the workpiece beneath machined surface. Low-carbon alloyed steel with 10.8 µm (as-received) and 1.7 µm (ultrafine) grain sizes were end milled using the down-milling and dry condition in a CNC machining center. The results show ultrafine-grained workpiece preserves its surface integrity against cutting parameters more than the as-received material. Cutting speed increases the microhardness while depth of cut deepens the hardened layer of the as-received material. Also, deformations of microstructure following feed rate direction were observed in workpiece subsurface.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/S1516-14392011005000094