铝合金锻件端面线状缺陷分析与控制  

Analysis and Control for Linear Defect in Aluminum Alloy Forging

作　　者：李东东[1] 王影[2] 谷胜民[1] 王唐超 刘涛[1] 林德健[1] 

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]航天材料及工艺研究所,北京100076

出　　处：《失效分析与预防》2015年第2期102-106,共5页Failure Analysis and Prevention

摘　　要：5A06铝合金锻件在加工过程中发现线状缺陷,对此锻件进行缺陷形貌观察以及金相、断口、硬度和成分分析,结合其制造工艺,分析认为:铝锻件端面的线状缺陷为锻造折叠缺陷;此缺陷破坏了铝锻件的金属连续性,降低了铝锻件的承载能力;缺陷应由锻造工艺控制不当所致,形成于冲孔、环锻工序;在铝锻件的出厂检验及到货验收环节,增加超声波检测及上下端面的荧光检查,可以有效地剔除存在此类缺陷的锻件产品。5A06 aluminum alloy forging was found to have linear defect in the machining process. In order to find out the failure cause, morphological observation, metallographic structure examination, fracture surface analysis, hardness analysis and chemical composition analysis were carried out. The result shows that the linear defect is folding defect. It destroyed the continuity of metal and reduced the load capacity of the aluminum alloy forging. The defect may be caused by the inappropriate control in the forging process. It formed during the process of punching and ring forging. In the process of delivery inspection and acceptance test, the forging with the linear defect can be eliminated effectively by adding the ultrasonic inspection and fluoroscope.

关 键 词：铝合金锻件 线状缺陷 折叠 

分 类 号：TG319[金属学及工艺—金属压力加工]