Laser & Optoelectronics Progress, Volume. 59, Issue 13, 1316001(2022)
Structure and Properties of T2 Copper/304 Stainless Steel Laser Welded Joint
Figures & Tables(14)
Fig. 2. Macro morphology of welded joints under different beam offsets. (a) 0 mm; (b) 0.2 mm;（c）0.4 mm;（d）-0.2 mm;（e）-0.4 mm
Fig. 3. Schematic diagrams of formation mechanism of weld morphology. (a) Metal evaporation force; (b) Marangoni convection
Fig. 4. Microstructure of the copper fusion zone under different beam offsets. (a) 0 mm; (b) 0.2 mm;（c）0.4 mm;（d）-0.2 mm;（e）-0.4 mm
Fig. 5. Microstructure of the weld center under different beam offsets. (a) 0 mm; (b) 0.2 mm; (c) 0.4 mm; (d) -0.2 mm; (e) -0.4 mm
Fig. 6. Tensile test results of welded joints. (a) Stress-strain curve; (b) stress-elongation histogram
Fig. 7. Fracture morphology of welded joints under different beam offsets. (a) 0 mm; (b) 0.2 mm; (c) 0.4 mm; (d) -0.2 mm; (e) -0.4 mm
Table 1. Chemical composition of T2-Y and SUS304
View tableTable 1. Chemical composition of T2-Y and SUS304
Material Mass fraction /% Cu C Cr Ni Mn Fe Si T2-Y ≥99.95 - - - - ≤0.005 - SUS304 - ≤0.08 18-20 8.0-10.5 ≤2.00 Bal. ≤1.00
Table 2. Mechanical properties of T2-Y and SUS304
View tableTable 2. Mechanical properties of T2-Y and SUS304
Material Tensile strength /MPa Yield strength /MPa Hardness /HV0.1 T2-Y 215‒275 60‒70 60‒90 SUS304 ≥520 205 210
Table 3. Laser welding parameters
View tableTable 3. Laser welding parameters
Sample No. Laser power P /kW Welding speed v /（mm·min-1） Beam offset /mm Defocus /mm Gas flow /（L·min-1） 1# 3.7 1000 0 -2 25 2# 0.20 3# 0.40 4# -0.20 5# -0.40
Table 4. EDS test results of weld
View tableTable 4. EDS test results of weld
Detection location Mass fraction /% Phase composition Fe Cu Cr Ni A 56.00 16.00 21.00 6.00 γ-Fe B 4.90 93.80 1.30 - Cu C 67.39 9.70 16.08 6.83 Fe D 56.75 23.77 13.71 5.77 α-Fe E 10.00 85.29 2.18 2.53 Cu F 60.61 15.89 17.53 5.89 Fe G 51.70 30.89 11.54 5.86 Fe H 8.00 86.89 3.58 1.53 Cu
Table 5. EDS test results of stretch fracture
View tableTable 5. EDS test results of stretch fracture
Detection location Mass fraction /% Phase composition Fe Cu O I 5.03 66.82 28.15 Cu2O J 13.58 57.55 28.87 Cu2O K 5.79 68.57 25.64 Cu2O L 11.49 58.28 30.23 Cu2O
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Jihong Li, Longyu Lei, Mingke Du, Yunlong Zhang, Min Zhang, Jie Shi, Jun Gao. Structure and Properties of T2 Copper/304 Stainless Steel Laser Welded Joint[J]. Laser & Optoelectronics Progress, 2022, 59(13): 1316001
Paper Information
Category: Materials
Received: Jun. 30, 2021
Accepted: Aug. 9, 2021
Published Online: Jun. 9, 2022
The Author Email: Li Jihong (lijihong@xaut.edu.cn)
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