Effect of addition of tin on the microstructure and machinability of alpha-brass

• This study was aimed at developing lead-free brass alloys with the goal of substituting lead element with tin. For this purpose, lead-free alloys with tin were developed and the microstructure, hardness and machining behaviour of the Cu-30%Zn alloy was compared with Cu-30%Zn-x%Sn (x = 1.2, 3.2, 5.4, 8,11.4,13.9,17.4). The results showed that the addition of Sn to single-alpha phase brass led to the formation of duplex (alpha + beta') brass and then the formation of (beta' + gamma) brass both with increased hardness. In addition, the addition of Sn to Cu-30%Zn alloy led to the decrement of equivalent machining forces (F-m), surface roughness and also the promotion of chip fragmentation due to the formation of the beta' phase, which is an improvement in machinability.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

Lead-free brass

alpha brass

tin

hardness

machinability

chip formation

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)