Q295GNH weathering steel plate small hole: the solution of laser cutting overburning problem in carbon steel cutting with oxygen as auxiliary gas, the key to solve the problem is how to inhibit the generation of oxidation reaction heat. Auxiliary oxygen and delayed switching to auxiliary air or nitrogen during perforation can be used for cutting.
This method can process the small hole of 1 / 6 thickness Q295GNH weathering steel plate. The pulse cutting condition with low frequency peak output power can reduce the heat output, which is helpful to optimize the cutting conditions of Q295GNH weathering steel plate.
Setting the conditions of single pulse laser beam, high peak output, high energy intensity and low frequency can effectively reduce the accumulation of molten metal on the surface of Q295GNH weathering steel plate during the piercing process, and effectively inhibit the heat output.
Precautions for Small Hole Cutting of Q295GNH Weathering Steel Plate:
1. Tool Selection: Use high-speed steel (HSS) or carbide drills to minimize wear and ensure clean cuts.
2. Cutting Speed: Maintain moderate RPM (200-500 for 5-10mm holes) to avoid overheating and hardening.
3. Cooling/Lubrication: Apply coolant or cutting oil to reduce heat buildup and extend tool life.
4. Deburring: Remove sharp edges post-cutting to prevent stress concentrations and maintain corrosion resistance.
5. Rust Prevention: Clean cuttings promptly to avoid surface contamination affecting weathering properties.
