Nitrogen/helium content following to laser power, being manner for the laser welding which is controlled, uses the nitrogen/gaseous helium blend and

摘要

This invention regards laser welding method and the equipment which use the sealed gas blend which includes nitrogen and helium. According to this invention, the nitrogen in the aforementioned gas blend and/or ratio of helium, following to power of the laser beam or power density, is selected or adjusts, or. Laser power, 0.5kW or 30kW, desirably is included in 5kW or 20kW. The sealed gas blend includes nitrogen and/or helium, the aforementioned gas blend, includes the cubic measure ratio of 30% or 80% helium desirably, remainder nitrogen and is the inevitable impurity which can exist.