5A06铝合金铸锭裂纹原因分析及预防措施  

Analysis and Preventive Measures of Causes of Cracks of 5A06 Aluminum Alloy Casting Ingot

作　　者：高新宇[1] 王海彬[1] 孙婧彧 谭树栋 

机构地区：[1]东北轻合金有限责任公司,哈尔滨150060

出　　处：《黑龙江冶金》2015年第5期11-14,共4页

摘　　要：通过显微组织、扫描电镜观察及能谱分析等手段,分析了5A06铝合金铸锭裂纹的产生原因。通过组织分析,该裂纹为沿晶断裂,属于热裂纹,在主裂纹区域发现很多微裂纹,并且裂纹与第二相伴生,存在大量晶内弥散相聚集于裂纹附近,裂纹发生时间为铸锭凝固末端。并从形成机理上对5A06铝合金铸锭裂纹的成因进行了分析,从铸造工艺等方面提出了解决措施。The reasons of 5A06 aluminum alloy casting ingot crack were analyzed through optical microscope,SEM and EA. Through analyses of the casting crack,cracks are intergranular fracture that is belonging to hot cracking,and many micro- cracks were found in the crack region,and these cracks is associated with second phase. The large intragranular dispersion gathered near the cracks.The cracks were found in the end of the ingot solidification. The causes of crack of the 5A06 were analyzed based on formation mechanism,and the solutions are proposed in the respect of casting process.

关 键 词：5A06铝合金 铸造裂纹 热裂纹 

分 类 号：TG115[金属学及工艺—物理冶金]