Background
Pressure vessel manufacturing requires high-strength, porosity-free welds that strictly meet GB/T 150, ASME VIII, and other standards. Traditional multi-pass TIG/MIG welding on 3–5mm steel plate needs 3–4 passes — slow, prone to inter-pass slag inclusions, and high rework rate.
Solution Specs
| Item | Details |
|---|---|
| Machine Model | Zhijie MJ-20-BFL handheld laser welder |
| Laser Source | 2000W fiber laser |
| Wire Feeder | Auto wire feeder (standard) |
| Shielding Gas | CO₂ |
| Welding Material | Carbon steel Q355, 3.0 – 5.0mm |
| Welding Type | Single-pass butt joint on vessel body |
Key Results
| Metric | Before (multi-pass TIG) | After (2000W laser) | Improvement |
|---|---|---|---|
| Passes Required | 3 – 4 passes | Single pass | 4x faster |
| Porosity Rate | ~ 3% (inter-pass slag) | ~ 0.2% | 15x lower |
| UT Test Result | Meets GB/T 150 | Meets GB/T 150 | Same quality, double speed |
| Heat Input | High, pre-heat needed | Low, no pre-heat | Simplified process |
Recommended Products
- 2000W Handheld Laser Welder — designed for 1–5mm thick steel, standard auto wire feeder
- 3000W Handheld Laser Welder — for thicker plates (up to 6mm) or deeper penetration requirements
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