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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 6    December 2005

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Microstructure and properties of cutting magnesium-brass containing no lead
HUANG Jin-song(黄劲松)1, PENG Chao-qun(彭超群)1, ZHANG Si-qi(章四琪)2,
 HUANG Bai-yun(黄伯云)1, MA Chang-song(马长松)2 

1. State Key Laboratory of Powder Metallurgy, Central South University, 
Changsha 410083, China; 
2. School of Materials Science and Engineering, Central South University, 
Changsha 410083, China

Abstract: A new environmental friend cutting brass containing magnesium instead of lead was produced by casting, extruding and drawing. Its microstructure was observed and its mechanical, chemical and cutting properties were stutied. The results show that the global secondary particles which are brittle and soft intermetallics, distribute in grains and on grain boundries, which is helpful for improvement of cutting ability of the brass. The tensile strength, yield strength, elongation and area reduction of halfhard magnesium-brass are 550MPa, 280MPa, 16.30%, 32.4%, respectively. The cutting ability of magnesium-brass corresponds to that of lead-brass C3604 judged by the size and appearance of  chips of alloy and by the cutting force. The magnesium-brass has excellent corrosion resistance.

 

Key words:  lead; magnesium; brass; cutting; microstruture; property

ISSN 1672-7029
CN 43-1423/U

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