7A09铝合金锻件探伤缺陷研究  

Flaw detection of 7A09 aluminum alloy forgings

作　　者：霍庆利[1] 张晶[1] 罗建华[1] 曹永亮[1] 李超[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》2013年第2期46-49,共4页Light Alloy Fabrication Technology

摘　　要：针对7A09铝合金锻件在进行成品A级探伤时发现内部组织存在长条形超标缺陷,对锻件缺陷部位进行定位剖伤,通过对剖伤后的缺陷部位和正常部位进行低倍、显微硬度、显微组织和能谱分析等多方面进行对比分析,确定7A09铝合金锻件探伤超标的长条形缺陷实际为Al-Cr化合物一次晶所致,并对该化合物一次晶缺陷形成机制和改进措施进行了阐述。The over-standard elongated strip defects in structure of 7A09 aluminum alloy finished forgings have been found during A level nondestructive flaw detection. The defects position in the forgings have been fixed and then destructed. After destruction, the defect po- sition and normal position have been compared with each other by using of macrostructure, microstructure, micro-hardness and energy spectrum. The result shows that over-standard e- longated strip defects are caused by primary crystal A1-Cr compounds. The formation mecha- nism of primary crystal defects and improvement measures have been introduced.

关 键 词：锻件 显微硬度 能谱分析 化合物 

分 类 号：TG115.28[金属学及工艺—物理冶金] TG316.193[金属学及工艺—金属学]