| 摘要 |
<p>A method of welding thin sheet metallic components such that a focused laser beam is used as a heat source with power sufficient to melt welded metallic components and directed to a weld pool to which a cooled inert shielding gas is supplied while the parts of welded components adjacent to the weld pool are cooled to the temperature ranging from approximately - 100 °C to approximately - 200 °C. In accordance with the invention a flow of liquid nitrogen is directed to the weld pool as an alloying material and the inert shielding gas is cooled to the temperature in the range from approximately - 170 °C to - 200 °C.</p> |
