| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent oxidation of a sample in a high-power laser beam welding. SOLUTION: The sample is irradiated with a laser beam by passing the laser beam through a laser beam transmitting material whose transmitivity is 90% or greater in a chamber filled with a fluidizing inert gas. In this case, the laser beam transmitting material is not located on the inner wall of the chamber positioned in the extended direction of the normal line of the irradiated face, the laser beam is made to irradiate through a laser beam transmitting material whose transmitivity is 90% or greater and which has a form of a convex circle vertically directed downwards in the chamber, the sample is irradiated with the laser beam while the gas is fluidized in the chamber which is connected with the emitting head part of the laser beam by a guide pipe, and further the laser beam is made to irradiate by transmitting through an air curtain which is made by fluidizing the gas.</p> |
