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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 2    April 2007

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In-situ weld-alloying plasma arc welding of SiCp/Al MMC
LEI Yu-cheng(雷玉成), YUAN Wei-jin(袁为进), CHEN Xi-zhang(陈希章),
ZHU Fei(朱 飞), CHENG Xiao-nong(程晓农)

School of Materials Science and Engineering, Jiangsu University,
Zhenjiang 212013, China

Abstract:Plasma arc welding was used to join SiCp/Al composite with titanium as alloying filler material. Microstructure of the weld was characterized by an optical microscope. The results show that the harmful needle-like phase Al4C3 is completely eliminated in the weld of SiCp/Al metal matrix composite(MMC) by in-situ weld-alloying/plasma arc welding with titanium as the alloying element. The wetting property between reinforced phase and Al matrix is improved, a stable weld puddle is gotten and a novel composite-material welded joint reinforced by TiN, AlN and TiC is produced. And the tensile-strength and malleability of the welded joints are improved effectively because of the use of titanium.

 

Key words: SiCp/Al MMCs; plasma arc welding; in-situ weld-alloying; aluminum carbide; titanium nitrogen; aluminum nitrogen

ISSN 1672-7029
CN 43-1423/U

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