中国激光, 2019, 46 (4): 0402011, 网络出版: 2019-05-09
低热输入脉冲激光修复高温合金液化裂纹研究 下载: 892次
Liquation Cracks in Superalloys Repaired by Low-Heat Input Pulsed Laser
图 & 表
图 1. 修复实验示意图。(a) V型槽;(b)模拟修复路径
Fig. 1. Schematic of repair experiment. (a) V-groove; (b) simulated repairing path
图 4. 铸态K452的显微组织。(a)典型的相分布;(b)晶界的γ'相;(c)晶内的γ'相
Fig. 4. Microstructure of as-cast K452. (a) Typical phase distribution; (b) γ'phase on grain boundaries; (c) γ'phase inside grains
图 5. 热影响区中液膜特征。(a)低熔点共晶液化裂纹;(b)组分液化裂纹
Fig. 5. Characteristics of liquid film in heat affected zone. (a) Low-melting eutectic liquation crack; (b) component liquation crack
图 6. 不同激光能量密度下的试样横截面图。(a) 30 J/mm2;(b) 35 J/mm2;(c) 40 J/mm2;(d) 30 J/mm2;(e) 35 J/mm2;(f) 40 J/mm2
Fig. 6. Cross sections of samples under different laser energy densities. (a) 30 J/mm2; (b) 35 J/mm2; (c) 40 J/mm2; (d) 30 J/mm2; (e) 35 J/mm2; (f) 40 J/mm2
图 7. 不同激光模式下的显微组织。(a)连续激光;(b)脉冲激光
Fig. 7. Microstructures under different laser modes. (a) Continuous laser; (b) pulsed laser
图 8. 不同激光能量密度下的试样横截面。(a) 30 J/mm2;(b) 35 J/mm2
Fig. 8. Cross sections of samples under different laser energy densities. (a) 30 J/mm2; (b) 35 J/mm2
图 9. 修复件的显微硬度。(a)横截面;(b)纵截面
Fig. 9. Microhardness of repaired sample. (a) Cross section; (b) longitudinal section
图 10. 热影响区微观组织特征。(a)热影响区微观组织;(b) 1处的γ'相;(c) 2处的γ'相;(d) 3处的γ'相
Fig. 10. Microstructure characteristics of HAZ. (a) microstructure of HAZ; (b) γ'phase at position 1; (c) γ' phase at position 2 ; (d) γ' phase at position 3
表 1激光修复参数
Table1. Parameters for laser repairing
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表 2激光增材修复试样和基体的拉伸性能
Table2. Tensile properties of laser additive repaired (LARed) sample and substrate
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赖境, 路媛媛, 张航, 陈浩, 林守钢, 刘德健. 低热输入脉冲激光修复高温合金液化裂纹研究[J]. 中国激光, 2019, 46(4): 0402011. Jing Lai, Yuanyuan Lu, Hang Zhang, Hao Chen, Shougang Lin, Dejian Liu. Liquation Cracks in Superalloys Repaired by Low-Heat Input Pulsed Laser[J]. Chinese Journal of Lasers, 2019, 46(4): 0402011.