Application Field: Stainless Steel Industrial Welded Pipe

Material: 300 series, 400 series, 2205 duplex steel, nickel-based alloys

Pipe Diameter: Φ5-114 mm

Wall Thickness: 0.4-4.0 mm

1. Double环形焊接 technology advantages

1. Accurate hot input control

Fiber Laser: High energy density, achieving deep penetration welding with strong penetration power.

Semiconductor Laser: Large spot even heating for cleaning, preheating (reducing cold cracks) and slow cooling (reducing residual stress).Splash suppression.

Dual-loop Collaboration: Optimizes thermal cycles through power ratio matching to prevent sensitization zone corrosion of stainless steel.

2. Improved Weld Quality

Enhanced molten pool fluidity, porosity reduced by >50%.

Heat-affected zone width reduced by 30%, with a more even hardness distribution.

No internal splatter, ensuring the interior wall is clean.

Section II: Key Technological Innovation Points

Dual-beam energy coupling

Adjust dual laser power ratios based on melt pool image features (width-to-depth ratio).

2. Zero-gap welding technology

Semiconductor laser pre-melting filling metal, compensating for the micro-gap at the tube end face.

3. Intelligent Weld Seam Formation PredictionSelectable options）

Machine learning model (capable of storing over 1000 sets of welding parameters).

III. Economic Profit Analysis

Cost savings

Substitute for TIG Welding: Speed increased by 3-5 times.

Good quality rate ≥ 98%, return rate < 0.5%.

4. Production Process

Open Book → Shear & Weld → Stock Reel → Steel Strip Cleaning → Trim Import → Shaping → Laser Welding → Weld Tracking → High-Speed Flatting → Weld Grinding → Initial Diameter Setting → Tube Cleaning → Stabilizing Bright Heat Treatment → Final Diameter Setting → Eddy Current Testing → Coding → Synchronous Cutting → Automatic Blank Cutting