Influence of Laser-Arc Distance on Joint of 304 Stainless Steel by Laser-MIG Hybrid Welding

Limei Han; Detao Cai; Yupeng Zhang; Nannan Zhang

doi:10.3788/LOP55.061407

Laser & Optoelectronics Progress, Volume. 55, Issue 6, 061407(2018)

Influence of Laser-Arc Distance on Joint of 304 Stainless Steel by Laser-MIG Hybrid Welding

Limei Han^{1,2、1; 2;}, Detao Cai^2、2;, Yupeng Zhang^2、2;, and Nannan Zhang^1、1;

Author Affiliations

¹ School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China

² Guangdong Key Laboratory of Modern Welding Technology, Guangdong Institute of Welding Technology (China-Ukraine E.O.Paton Institute of Welding), Guangzhou, Guangdong 510650, China

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Figures & Tables(14)

Fig. 1. Back width ratio of the welding seam

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Fig. 2. Reinforcement and back reinforcement of the welding seam

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Fig. 3. XRD diagrams of base metal and welding seam. (a) Base metal; (b) welding seam

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Fig. 4. Microstructure of base metal

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Fig. 5. Solidification mode and pseudo-binary phase diagram

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Fig. 6. Cross-sectional morphology of the welding seam

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Fig. 7. Microstructures in different regions of the welding seam. (a) Ⅰ zone; (b) Ⅱ zone; (c) Ⅲ zone

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Fig. 8. Microstructure in partial zone of the welding seam. (a) Skeletal δ-ferrite; (b) lathy δ-ferrite

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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

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Fig. 10. Tensile strength and elongation of welding seams under different laser-arc distances

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$SEM morphologies of stretch fracture. (a) Base metal; (b) welding seam$

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 1. Mass fractions of the chemical compositions of base material and filler wire%
Material C Mn P S Si Cr Ni Mo N Fe
304 stainless steel 0.07 1.03 0.035 0.03 0.075 18.30 8.24 0 Bal.
ER308 0.04 1.85 0.014 0.008 0.35 20.20 9.58 0.45 Bal.

Table 2. Welding process parameters
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Table 2. Welding process parameters
Laser-arcdistance /mm Weldingspeed /(m·min^-1) Wire feedingrate /(m·min^-1) Laser power /kW Arccurrent /A Arcvoltage /V
0 to 6 1.8 5.0 4.3 147 20.3

Table 3. Macroscopic and cross-sectional morphologies of welding seams under different laser-arc distances
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Table 3. Macroscopic and cross-sectional morphologies of welding seams under different laser-arc distances
Number Welding seam cross section Welding seam macroscopic morphology
1-1 (D_LA=0 mm)
1-2 (D_LA=1 mm)
1-3 (D_LA=2 mm)
1-4 (D_LA=4 mm)
1-5 (D_LA=6 mm)

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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

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Paper Information

Category: Lasers and Laser Optics

Received: Dec. 19, 2017

Accepted: --

Published Online: Sep. 11, 2018

The Author Email: Yupeng Zhang (zhangyp@gwi.gd.cn)

DOI:10.3788/LOP55.061407

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Mass fractions of the chemical compositions of base material and filler wire%

Table 1. Mass fractions of the chemical compositions of base material and filler wire%

Table 2. Welding process parameters

Table 2. Welding process parameters

Table 3. Macroscopic and cross-sectional morphologies of welding seams under different laser-arc distances

Table 3. Macroscopic and cross-sectional morphologies of welding seams under different laser-arc distances