锻压技术

铝合金筋类零件锻造缺陷分析

英文标题：Analysis on forging defects of aluminum alloy forging with rib

作者：韦韡蒋鹏唐永夫牛立志曹飞

关键词：铝合金筋类锻件锻造缺陷

分类号：TG316

出版年,卷(期):页码：2012,37(4):18-21

摘要：

针对铝合金筋类零件在锻造过程中产生的折叠、充不满、穿流等各种缺陷产生的原因进行分析。分析结果表明：过渡圆角的大小对折叠和穿筋有较大影响，增大圆角，可减小材料向筋部流动的阻力，改善材料的流动状态，避免折叠和穿筋；各工序间坯料截面面积的匹配也是导致缺陷的原因，合理的坯料截面面积应比该处终锻截面面积大5%~10%,面积太小容易导致充不满，太大又会出现穿流穿筋等缺陷；模具模膛的表面质量会影响材料的流动性能，导致锻件产生充不满和起皮等缺陷。

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.

基金项目：

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