Application Field: Stainless Steel Industrial Welded Pipes

Material: 300 series, 400 series, 2205 Duplex Steel, Nickel Alloys

Pipe diameter: Φ5-114 mm

Wall Thickness: 0.4-4.0 mm

Section 1: Advantages of Double Ring Welding Technology

1. Precise thermal input control

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

Semiconductor laser: Large spot uniform heating, cleaning, preheating (reduces cold cracks) and slow cooling (reduces residual stress).Splash suppression.

Dual-loop Coordinated: Optimize thermal cycles via power ratio to prevent sensitization zone corrosion of stainless steel.

2. Improved Weld Quality

Enhanced molten pool fluidity, pore rate reduced by >50%.

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

No internal splatter, ensuring a clean interior wall.

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).

Zero-gap welding technology

Semiconductor laser pre-melt filling metal for compensating the minute gap at the tube ends.

3. Weld Seam Formation Intelligent PredictionSelect as required）

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

Section 3: Economic Profit Analysis

Cost savings

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

Quality rate ≥ 98%, return rate < 0.5%.

Section 4: Production Process

Open book ➡ Shear butt welding ➡ Storage tank ➡ Steel strip cleaning ➡ Trim import ➡ Shaping ➡ Laser welding ➡ Weld tracking ➡ High-speed leveling ➡ Weld polishing ➡ Initial sizing ➡ Pipe cleaning ➡ Stabilized bright heat treatment ➡ Final sizing ➡ Eddy current testing ➡ Coding ➡ Synchronous cutting ➡ Automatic blanking