Hai Liu, Hui Chen. Effect of Laser Power on Microstructure and Properties of Dissimilar Steel's Laser Welded Joint[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2314007
- Laser & Optoelectronics Progress
- Vol. 58, Issue 23, 2314007 (2021)
Fig. 1. Surface morphologies of welded joints with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 2. Section morphologies of welded joints with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 3. Metallographic photos of welds with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 4. SEM photos of welds with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 5. Microhardness of welded joints with different laser powers
Fig. 6. Fracture positions of the specimens with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 7. SEM diagram of tensile fracture
Fig. 8. EDS profiles of welds with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
Fig. 9. XRD patterns of welds with different laser powers. (a) 4 kW; (b) 5 kW; (c) 6 kW; (d) 7 kW
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Table 1. Chemical composition of 304 stainless steel
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Table 2. Chemical composition of Q345B steel
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Table 3. Mechanical properties of 304 stainless steel and Q345B steel
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Table 4. Tensile strength of welding specimens with different laser powers
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Table 5. Mass fraction of main elements in welds
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