Limei Han, Detao Cai, Yupeng Zhang, Nannan Zhang. Influence of Laser-Arc Distance on Joint of 304 Stainless Steel by Laser-MIG Hybrid Welding[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061407
- Laser & Optoelectronics Progress
- Vol. 55, Issue 6, 061407 (2018)
Fig. 1. Back width ratio of the welding seam
Fig. 2. Reinforcement and back reinforcement of the welding seam
Fig. 3. XRD diagrams of base metal and welding seam. (a) Base metal; (b) welding seam
Fig. 4. Microstructure of base metal
Fig. 5. Solidification mode and pseudo-binary phase diagram
Fig. 6. Cross-sectional morphology of the welding seam
Fig. 7. Microstructures in different regions of the welding seam. (a) Ⅰ zone; (b) Ⅱ zone; (c) Ⅲ zone
Fig. 8. Microstructure in partial zone of the welding seam. (a) Skeletal δ-ferrite; (b) lathy δ-ferrite
Fig. 9. Microhardness of the welding seam. (a) Upper part of the welding seam; (b) middle part of the welding seam; (c) lower part of the welding seam; (d) comparison of microhardness distribution in three regions
Fig. 10. Tensile strength and elongation of welding seams under different laser-arc distances
Fig. 11. SEM morphologies of stretch fracture. (a) Base metal; (b) welding seam
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Table 1. Mass fractions of the chemical compositions of base material and filler wire%
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Table 2. Welding process parameters
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Table 3. Macroscopic and cross-sectional morphologies of welding seams under different laser-arc distances
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