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 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.

Bibliographic Details

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:	Digital revista
Language:	English
Published:	ABM, ABC, ABPol 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100017
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