博文

目前显示的是标签为“laser welding”的博文

Application of laser welding on stainless steel

  Heat Input, Cooling Rate, And Metallurgical Control Laser welding is inherently a low heat input, high cooling rate process, which is one reason it’s so effective for stainless steel. But “low heat” is not automatically “good” — the wrong heat input or cooling profile can lead to incomplete fusion, excessive ferrite, or microstructural defects that compromise both strength and corrosion resistance. By managing laser power, travel speed, beam focus, and filler selection, welders can control not just bead shape, but the metallurgy itself. Keep Heat Input Low — But Not Too Low ·  Why low heat is good: 1.  Reduces distortion and residual stress, especially important in thin austenitic sheets with high thermal expansion. 2.  Minimizes heat tint and oxide formation, reducing the need for post-weld cleaning. ·  Why too low is bad: 1.  Insufficient penetration and lack of fusion defects. 2.  Excessively rapid solidification can trap gases and increase porosi...

How to maintain the important components of laser welding? (1).

  Gas System The gas system provides protective gases, typically high-purity argon or nitrogen, crucial for quality welds.   Maintenance Procedures   Check Gas Handling Components: Inspect all gas handling components, such as pressure regulators and solenoid valves, for any damage or gas leaks. Promptly address any issues to ensure safe and effective operation.   Water Chiller The chiller is a crucial component of laser welder, responsible for providing cooling to both the laser and the welding head:   Maintenance Procedures   Cleaning the Heat Exchanger: Regularly clean the heat exchanger fins using a brush, followed by blowing compressed air to remove any debris, ensuring efficient heat dissipation. Dusting the Condenser: Periodically remove dust from the condenser to maintain airflow and cooling efficiency. Checking Water Levels: Regularly monitor the water level in the chiller tank. If levels are low, promptly add distilled or deionized water to avoid o...