Surface integrity analysis when milling ultrafine-grained steels

Materials Research

Alessandro Roger Rodrigues²  Oscar Balancin¹  Juno Gallego¹  Cleiton Lazaro Fazolo De Assis²  Hidekasu Matsumoto¹  Fernando Brandão De Oliveira¹  Suzana Regina Da Silva Moreira¹  Otavio Villar Da Silva Neto¹ 

[1] ,University of São Paulo Engineering School of São Carlos Mechanical Engineering DepartmentSão Carlos SP ,Brazil

关键词: milling;    surface integrity;    microstructure;    microhardness;    ultrafine-grained steel;   

DOI  :  10.1590/S1516-14392011005000094

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License