6063-H112铝合金板材加工裂纹产生的原因  

Causal analysis of the cracks in machining pieces of 6063-H112 aluminium alloy plates

作　　者：李晓波[1] 邵海霞[1] 苏玉洁[1] 郭红[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》2009年第2期24-26,共3页Light Alloy Fabrication Technology

摘　　要：厚度25mm的6063-H112铝合金板材,用户在加工过程中发现个别加工件存在裂纹。根据用户提供的试样,从裂纹的外观形貌、断口的显微组织特征和扫描电镜特征等几个方面进行了系统地分析,并结合生产工艺的特点,判断出厚度为25mm的6063-H112铝合金板材裂纹是由于铸锭侧表面的偏析瘤压入所致。对其形成机制和预防措施进行了阐述。Several machining pieces of 6063-H112 plates with thickness 25mm were discovered some cracks in processing them by customers. Based on that the testing samples supplied by customers had been systematically observed in the ways as the shape of crack appearance, and the features of their fracture and microscopic structures, and of electronic scanning, as well as combination with the features of the process of production, the cracks in the plates of 6063-H112 with thickness 25 mm have been analyzed and decided, that is which were caused by the laminating at the sides of the plates into which the segregated building-ups located in the sides of slabs had pressed. In addition, the mechanism of forming the cracks and precautions to address them have been depicted.

关 键 词：6063-H112合金板材 裂纹 板材分层 偏析瘤 

分 类 号：TG146.21[一般工业技术—材料科学与工程] V263.1[金属学及工艺—金属材料]