高熵合金切削性研究
Date Issued
2004
Date
2004
Author(s)
鍾時彥
DOI
zh-TW
Abstract
This study presents an experimental investigation of the machinability of five kinds of High-Entropy Alloys and the effects of Al, Cu, Co elements inclusion on material properties in turning of High-Entropy Alloys.
When the Fe1Co1Ni1Cr1Cu0.2Al1 alloy is put under turning with cutting fluid at lower speed (<32m/min), the tool flank wear is reduced. If the cutting speed increased, breakage and chipping would appear on tool nose. Cutting force is large when turning Fe1.5Ni0.5Cr1Al0.3Mn1 alloy. It is found the material of workpiece is removed mainly by brittle fracture, and hence the surface roughness is poor. The hardness of other three kinds of alloys are much smaller. A great tool flank wear was found when turning Fe1Co1Ni1Cr1Cu0.2Al0.5 and Fe1.5Co1Ni0.5Cr1Al0.3Mn1 at higher cutting speed (90m/min), and as a result leads to unsatisfactory surface roughness.
In alloy Fe1Co1Ni1Cr1Cu0.2Alx, x=0.5,1, y=0.2,1 the x could be set around 0.8~0.9 in order to increase the machinability and the y could be set to 1 or higher to reduce the cutting force and tool wear in turning this material. In alloy Fe1.5CozNi0.5Cr1Al0.3Mn1,z=0,1, the z could be set around 0.1~0.3 to improve its ductility.
Subjects
切削液
表面粗糙度
切削性
cutting fluid
surface roughness
machinability
High-Entropy Alloys
Type
thesis
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