| 摘要 |
The present invention relates to a shielding gas for hybrid welding of a steel plate by combining laser welding and arc welding, characterized by containing: carbon dioxide; and oxygen, in which the mixing ratio of carbon dioxide and oxygen satisfies the following conditions: 15 ‰ A ‰ 35 , and , 1.0 ‰ B ‰¥ 9.0 , and B ‰¥ 16 - 0.6 �¢ A ,
in which A is the volume percentage of carbon dioxide and B is the volume percentage of oxygen. |
