Study on the wear of cutting-tools used in dry machining of cu-10wt%al-5wt%ni-5wt%fe alloy

Guimaraes M.A.; Dos Santos G.A.; Nascimento M.S.; Teram R.; Dos Santos V.T.; da Silva M.R.; Couto A.A.; Machado I.F.

Study on the wear of cutting-tools used in dry machining of cu-10wt%al-5wt%ni-5wt%fe alloy

Tipo

Artigo

Data de publicação

2021

Periódico

Defect and Diffusion Forum

Citações (Scopus)

0

Autores

Guimaraes M.A.
Dos Santos G.A.
Nascimento M.S.
Teram R.
Dos Santos V.T.
da Silva M.R.
Couto A.A.
Machado I.F.

Resumo

© 2021 Trans Tech Publications Ltd, Switzerland.Aluminium bronze alloys are special copper alloys that have a machinability rate from 20 to 40% compared to free cutting brasses, so the cutting parameters and type of tools suitable for machining of these materials may be very different for other copper alloys. Also, due to the relative high costs of the raw material, the absence of contamination of the chips by cutting fluids improve its intrinsic resales value and encourage the use of machining process without coolant. The aim of this work is to evaluate the tool wear mechanisms in the finishing machining of the Cu-10wt%Al-5wt%Ni-5wt%Fe aluminium-bronze alloy with carbide and cermet inserts at different cutting speeds under dry machining condition. The turning of material showed lower surface roughness in higher speed conditions and better dimensional stability at lower speeds. It was observed the formation of continuous chips, but of little volume occupied. The scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) analyses of tool wear show the adhesion as the main tool wear mechanism, followed by abrasion. At the lower cutting speed, the adhesion wears affected significantly the surface finish, reducing the tool life in comparison to the higher speeds.

Assuntos Scopus

Aluminum bronze , Aluminum bronze alloy , Cutting parameters , Cutting speed , Cutting types , Dry machining , Free cutting , Surface finishing , Tool wear , Tool wear mechanism