Surface Integrity Analysis when Milling Ultraflne-grained Steels

This paper quantifies the effects of milling conditions on surface integrity of ultraflne-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 mu m (as-received) and 1....

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Bibliographic Details
Published in:	Materials research (São Carlos, São Paulo, Brazil) Vol. 15; no. 1; pp. 125 - 130
Main Authors:	Rodrigues, A R, Balancin, O, Gallego, J, de Assis, CLF, Matsumoto, H, de Oliveira, FB, da Silva Moreira, SR, da Silva Neto, OV
Format:	Journal Article
Language:	English Portuguese Spanish
Published:	01-01-2012
Subjects:	Alloy steels Cutting speed Feed rate Integrity Microhardness Microstructure Steels Workpieces
Online Access:	Get full text
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Summary:	This paper quantifies the effects of milling conditions on surface integrity of ultraflne-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 mu m (as-received) and 1.7 mu m (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.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-1
ISSN:	1516-1439
DOI:	10.1590/S1516-14392011005000094