中国表面工程
中國錶麵工程
중국표면공정
CHINA SURFACE ENGINEERING
2010年
1期
97-100
,共4页
薛蕾%黄一雄%卢鹏辉%陈静%林鑫%黄卫东
薛蕾%黃一雄%盧鵬輝%陳靜%林鑫%黃衛東
설뢰%황일웅%로붕휘%진정%림흠%황위동
激光成形修复(LFR)%ZL104%Al-12Si(％)%微观组织%拉伸性能
激光成形脩複(LFR)%ZL104%Al-12Si(％)%微觀組織%拉伸性能
격광성형수복(LFR)%ZL104%Al-12Si(％)%미관조직%랍신성능
laser forming repair (LFR)%ZL104%Al-12Si (％)%microstructure%tensile properties
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.
激光成形脩複ZL104閤金的脩複區組織由α-Al和α-Al+Si共晶組織構成,鎔池底部組織由列狀α-Al枝晶構成,中部和頂部組織由α-Al等軸晶和枝晶間α-Al+Si共晶組織構成,觀察到的氣泡多封存在鎔池底部的α-Al列狀枝晶層中.基體區組織由粗大的α-Al枝晶和α-Al+Si共晶構成,觀察不到明顯的熱影響區.從脩複區嚮基體區過渡,硬度值呈減小趨勢.脩複試樣拉伸測試中,斷裂均髮生在鑄件基體處,錶明激光脩複區的彊度高于所脩複的鑄件材料.
격광성형수복ZL104합금적수복구조직유α-Al화α-Al+Si공정조직구성,용지저부조직유렬상α-Al지정구성,중부화정부조직유α-Al등축정화지정간α-Al+Si공정조직구성,관찰도적기포다봉존재용지저부적α-Al렬상지정층중.기체구조직유조대적α-Al지정화α-Al+Si공정구성,관찰불도명현적열영향구.종수복구향기체구과도,경도치정감소추세.수복시양랍신측시중,단렬균발생재주건기체처,표명격광수복구적강도고우소수복적주건재료.
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.
