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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 6    December 2003

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Interface of components with large ratio of altitude to diameter formed  by laminated pouring and accumulated liquid forging technology
JIANG Ju-fu(姜巨福), LUO Shou-jing(罗守靖), WANG Ying(王 迎)

School of Materials Science and Engineering, 
Harbin Institute of Technology, Harbin 150001, China

Abstract:Based on the experiment of laminated pouring and accumulated liquid forging of 2A12 aluminum alloy, interface bonding of formed component with large altitude to dimeter ratio of altitude to diameter was investigated by means of SEM and Instron tensile tester. The results show that the method of laminated pouring and accumulated liquid forging can be used for forming components with large ratio. Pouring temperature, reheated temperature of die, pressure, pouring layers and standing time are all important technique parameters that influence the mechanical properties. When pouring temperature is 740℃, reheated temperature of die is 480℃, pressure is 500kN, pouring layers are three and standing time is 5s, the mechanical properties of interface are the optimum ones, microstructure is equiaxed crystal and tensile fracture has character of dimple. There are three kinds of bonding, which are melting bonding, part melting bonding and mechanical bonding. And the interface of the melting bonding possesses the best mechanical properties.

 

Key words: laminated pouring; accumulated liquid forging; mechanical properties

ISSN 1672-7029
CN 43-1423/U

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