引用本文:薛蕾,黄一雄,卢鹏辉,陈静,林鑫,黄卫东.激光成形修复ZL104合金的组织与性能研究[J].中国表面工程,2010,(1):97~103
XUE Lei, HUANG Yi–xiong, LU Peng–hui, CHEN Jing, LIN Xin, HUANG Wei–dong.Study on Microstructure and Property of Laser Forming Repaired ZL104 Alloy[J].China Surface Engineering,2010,(1):97~103
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激光成形修复ZL104合金的组织与性能研究
薛蕾,黄一雄,卢鹏辉,陈静,林鑫,黄卫东1,2
1.薛蕾,卢鹏辉,陈静,林鑫,黄卫东(西北工业大学,凝固技术国家重点实验室,西安,710072);2.黄一雄(中国人民解放军第5719工厂,四川,彭州,611936)?
摘要:
激光成形修复ZL104合金的修复区组织由α–Al和α–Al+Si共晶组织构成，熔池底部组织由列状α–Al枝晶构成，中部和顶部组织由α–Al等轴晶和枝晶间α–Al+Si共晶组织构成，观察到的气泡多封存在熔池底部的α–Al列状枝晶层中。基体区组织由粗大的α–Al枝晶和α–Al+Si共晶构成，观察不到明显的热影响区。从修复区向基体区过渡，硬度值呈减小趋势。修复试样拉伸测试中，断裂均发生在铸件基体处，表明激光修复区的强度高于所修复的铸件材料。
关键词:  激光成形修复(LFR)  Al-12Si(％)  微观组织  拉伸性能  Al-12Si (％)
DOI：
分类号:
基金项目:凝固技术国家重点实验室自主研究课题(No. 16-TZ-2007)项目资助;中国博士后科学基金资助项目?
Study on Microstructure and Property of Laser Forming Repaired ZL104 Alloy
XUE Lei, HUANG Yi–xiong, LU Peng–hui, CHEN Jing, LIN Xin, HUANG Wei–dong1,2
1. Northwestern Polytechnical University, State Key Laboratory of Solidification Processing, Xi’an 710072;2. No.5719 Factory of the Chinese People’s Liberation Army, Peng Zhou 611936
Abstract:
In the present paper, ZL104 was repaired by Laser Forming Repair (LFR). Microstructure of laser repaired zone(LRZ) was composed by α–Al and α–Al+Si eutectic, epitaxial α–Al dendritic distributed in the bottom region of molten pool and α–Al equiaxed dendrites and α–Al+Si eutectic distributed in top region of molten pool. The porosities observed almost all embedded in the α–Al dendritic belts located in the bottom of molten pool. Microstructure of substrate zone(SZ) is composed by α–Al and α–Al+Si eutectic, and heat affected zone (HAZ) is hard to be figured out. Hardness value decreased from LRZ to SZ. Fractures were observed on casting substrate during tensile test, which showing that the strength of laser repaired zone is higher than that of casting substrate.
Key words:  ZL104  laser forming repair (LFR)  ZL104  microstructure  tensile properties
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