Transactions of Materials and Heat Treatment

Title：Analysis on forging defects of aluminum alloy forging with rib

Authors： WEI Wei1 JIANG Peng1 TANG Yong-fu2 NIU Li-zhi2 CAO Fei1

Unit： 1.Beijing Research Institute of Mechanical and Electrical Technology Beijing 100083 China 2.Ningbo Tuopu Steering System Co. Ltd. Ningbo 315806 China

KeyWords： aluminum alloy forging with rib forging defect

ClassificationCode：TG316

year,vol(issue):pagenumber：2012,37(4):18-21

Abstract：

Forging defects, such as folding, underfilling and fiber breaking in aluminum alloy forging with rib were analyzed. The result shows the influence of fillet radius on folding and fiber breaking. Larger fillet could ease flow resistance to rib,improve flow line and avoid folding and rib breaking. The matching of cross section between blank in different steps was significant cause of defects. Thus the reasonable cross section area of blank was 5%~10% larger than that of final forging. However, inadequate area eased to underfilling. Contrarily, the excess area might result in defects, such as fiber breaking or rib breaking. Furthermore, the surface quality of impression had influence on material flowing. This might result in underfilling or delamination.

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Reference：

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