How to use laser cutter to cut 2 mm steel plate?

Fev 11, 2025

Laser cutting is a highly precise and efficient method for processing steel plates, especially for thin materials like 2 mm steel. However, achieving optimal results requires careful attention to machine setup, material preparation, and parameter selection. Below is an expanded step-by-step guide to help you successfully cut 2 mm steel using a laser cutter.

1. Choose the Right Laser Type

• Laser de fibra:
  • Best suited for cutting steel due to its high efficiency, precision, and ability to handle reflective materials.
  • Offers faster cutting speeds and lower operating costs compared to CO2 lasers.
• Laser CO2:
  • Can cut steel but requires an oxygen assist gas to achieve the necessary energy for cutting.
  • Less efficient than fiber lasers for thin steel but still viable for certain applications.

2. Select the Right Laser Power

• Mild Steel:
  • A fiber laser with a power range of 1000W–1500W is ideal for cutting 2 mm mild steel.
• Stainless Steel:
  • For stainless steel, a higher power of at least 1500W–2000W is recommended to ensure clean cuts and avoid excessive heat buildup.

3. Prepare the Machine and Material

• Clean the Worktable:
  • Ensure the worktable is free of debris, dust, or residue from previous cuts to avoid interference with the cutting process.
• Secure the Material:
  • Use clamps or a vacuum table to firmly secure the 2 mm steel sheet on the CNC machine. This prevents movement during cutting, which can lead to inaccuracies or defects.
• Check Alignment:
  • Verify that the steel plate is properly aligned and leveled to ensure consistent cutting across the entire surface.

4. Use the Correct Assist Gas

• Oxygen (O2):
  • Ideal for cutting mild steel as it increases cutting speed by creating an exothermic reaction.
  • May cause oxidation on the edges, which can be removed during post-processing.
• Nitrogen (N2):
  • Best for cutting stainless steel, as it produces clean, oxidation-free edges.
  • Requires higher pressure (8–12 bar) to effectively blow away molten material.
• Air:
  • Can be used for cutting steel but may result in lower cut quality and increased burr formation compared to oxygen or nitrogen.

5. Set Cutting Parameters (for Fiber Laser)

Below are recommended parameters for cutting 2 mm steel with a fiber laser:

Material	Power (W)	Speed (mm/min)	Assist Gas	Pressure (bar)
Mild Steel (2 mm)	1000–1500	1800–3000	Oxygen	3–5
Stainless Steel (2 mm)	1500–2000	1500–2500	Nitrogen	8–12

• Note: These parameters may vary depending on the specific laser machine and material properties. Always refer to the manufacturer’s guidelines.

6. Adjust the Laser Focus

• The focal point of the laser beam should be slightly below the surface of the steel plate (typically 0.5–1 mm) to ensure optimal penetration and cutting quality.
• Use an auto-focus system if available to maintain consistent focus during the cutting process.

7. Perform a Test Cut

• Before starting the full cutting process, run a test cut on a small section of the steel plate.
• Inspect the test cut for:
  • Edge Quality: Check for smoothness and absence of burrs or dross.
  • Kerf Width: Ensure the cut width is consistent and within tolerance.
  • Heat-Affected Zone (HAZ): Look for signs of excessive heat, such as discoloration or warping.
• Adjust the laser power, cutting speed, or gas pressure as needed based on the test results.

8. Monitor the Cutting Process

• During the cutting process, watch for signs of incorrect settings, such as:
  • Excessive Burrs: Indicates insufficient laser power or incorrect gas pressure.
  • Dross Formation: Suggests the cutting speed is too slow or the gas pressure is too low.
  • Burn Marks: Caused by excessive heat, which may require reducing laser power or increasing cutting speed.
• Make real-time adjustments to optimize the cut quality.

9. Post-Processing

• Deburring:
  • Use a deburring tool or grinder to remove any sharp edges or burrs left after cutting.
• Cleaning:
  • If oxidation occurs (especially when using oxygen), clean the edges with a wire brush or chemical solution to restore the material’s appearance.
• Surface Finishing:
  • For stainless steel, consider polishing the edges to achieve a smooth, reflective finish.

10. Safety Considerations

• Laser Safety Goggles:
  • Always wear appropriate laser safety goggles to protect your eyes from harmful laser radiation.
• Ventilation:
  • Ensure proper ventilation or use an exhaust system to remove fumes and particles generated during cutting.
• Machine Safety:
  • Follow all Cnc fiber laser cutting machine safety guidelines, including emergency stop procedures and regular maintenance checks.
• Fire Safety:
  • Keep a fire extinguisher nearby, as cutting steel can produce sparks and heat that may pose a fire hazard.

About Superstar Laser

Laser Superstar is a trusted leader in providing high-quality Máquinas de corte a laser de fibra, CNC routers, and laser cutting machines to a wide range of industries. Our advanced machines deliver cutting-edge precision and efficiency, ensuring top-quality results for metalworking, automotive, aerospace, signage, and more. With a focus on reliability, minimal maintenance, and long-term durability, our machines are designed to provide a quick return on investment while enhancing your production capabilities. Choose Superstar Laser for superior laser solutions and take your manufacturing processes to new heights.