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7A09铝合金模锻连杆件的开裂分析
Alternative TitleFailure analysis on cracking of die-forged connecting rod of 7A09 alloy
刘艳梅1; 赵美兰2; 冯辉3; 白亚茹1; 李妍1; 王铁钢1
2020
Source Publication金属热处理
ISSN0254-6051
Volume45.0Issue:1.0Pages:234-238
Abstract通过断口形貌、显微组织、硬度以及化学成分等方法研究了7A09铝合金模锻连杆件开裂的原因。结果表明:裂纹主要起源于样品表面,并且从表面向试样内部沿晶界扩展;开裂试样的显微组织有晶界宽化、复熔共晶组织的现象,大致判定为过烧组织。主要原因是热处理过程中的温度失控导致7A09铝合金连杆件失效断裂,从而引起产品硬度下降,晶界强度下降,并提出了相关的改进措施。
Other AbstractThe causes of cracking failure of die-forged connecting rod of 7A09 alloy were studied by means of fracture morphologies,macrostructure,microstructure,hardness,chemical composition. The results show that the cracks are originated from the specimens surface,and gradually extended to the interior along the grain boundaries. Simultaneously,there are grain boundary broadening and remelting eutectic microstructure in the cracked specimens,which roughly can be judged the burnt microstructure. It is concluded that the overburning owing to temperature being out control during heat treatment is the main cause of cracking of die-forged connecting rod of 7 A09 alloy,and results in the decrease of hardness and grain boundary strength. And the relevant improvement measures are put forward.
Keyword7A09铝合金 开裂 原因分析 过烧
Indexed ByCSCD
Language中文
CSCD IDCSCD:6650859
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148246
Collection中国科学院金属研究所
Affiliation1.天津职业技术师范大学
2.中国第一重型机械集团公司天津重型装备工程研究有限公司
3.中国科学院金属研究所
Recommended Citation
GB/T 7714
刘艳梅,赵美兰,冯辉,等. 7A09铝合金模锻连杆件的开裂分析[J]. 金属热处理,2020,45.0(1.0):234-238.
APA 刘艳梅,赵美兰,冯辉,白亚茹,李妍,&王铁钢.(2020).7A09铝合金模锻连杆件的开裂分析.金属热处理,45.0(1.0),234-238.
MLA 刘艳梅,et al."7A09铝合金模锻连杆件的开裂分析".金属热处理 45.0.1.0(2020):234-238.
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