摘要
利用激光熔覆修复方法修复了预置有通槽的5A06铝合金试样,通过金相显微镜和扫描电子显微镜等对修复试样的显微组织和拉伸性能进行了分析。热影响区中的β相在修复过程中受到热作用,尺寸增大,当线能量达到166.7 J/mm时,β相尺寸增大到1μm以上。修复区的显微组织由α相、晶粒内部析出的β相及沿α相晶界分布的Al-Si共晶组织构成。当激光功率为1400 W时,未熔合缺陷得到有效抑制,气孔缺陷导致修复区强度和延伸率低于母材。
The 5A06 Al alloy samples with preset grooves are repaired by using laser cladding.The microstructures and tensile properties of these repaired samples are investigated by using metallurgical microscopy and scanning electron microscopy.Theβphase in the heat affected zone during repair grows as a result of heat input.When the line energy reaches 166.7 J/mm,theβphase size increases to larger than 1μm.The microstructure of repaired zone is composed ofαphase,βphase withinαgrains,and Al-Si eutectic phase alongαphase grain boundary.The lack-of-fusion defects are effectively suppressed when laser power is 1400 W and the pore defects result in the tensile strength and elongation of the repaired zone lower than those of base metal.
作者
张可召
何超威
林雨杨
严春妍
杨可
包晔峰
Zhang Kezhao;He Chaoweil;Lin Yuyang;Yan Chunyan;Yang Ke;Bao Yefeng(College of Mechanical and Electronic Engineering,Hohai University,Changzhou,Jiangsu 213022,China;State Key Lab of Adoanced Welding and Joining,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第23期234-240,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51804097,51879089)
中央高校基本科研业务费专项资金(B200202219)
常州市科技计划(CJ20190049)
先进焊接与连接国家重点实验室开放课题研究基金(AWJ-19M16)。
关键词
激光技术
激光熔覆修复
5A06合金
组织性能
laser technique
laser cladding repairing
5A06 alloy
microstructure and property
