2A12铝合金铰链裂纹原因分析  

Analysis of 2A12 aluminium alloy hinge cracking

作　　者：侯绎[1] 梁岩[1] 单长智[1] 王美琪[1] 

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2007年第10期47-50,共4页Light Alloy Fabrication Technology

摘　　要：用2A12铝合金挤压型材制作的铰链,在装配前发现一件铰链孔内及对应的外环两侧均有裂纹。为确定裂纹的性质,对其产生的原因进行了分析。最后确认是在机加工过程中的外力使铰链表面形成小裂口,在阳极氧化工艺中残留的腐蚀介质作用下产生了应力腐蚀。Some product use hinges, which are discovered having crack inside and outside the wreath. In order to make sure the property of the crack, analysis is made on the reason. In the end, the reason is that the outside dint which produces in the process of the machine processes makes small open wound on the surface of the hinge. The small open wound occur stress corrosion under the function of the corrosion which remains in anode oxide.

关 键 词：铰链 裂纹 应力 应力腐蚀 阳极氧化 

分 类 号：TG172.9[金属学及工艺—金属表面处理]