| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a welding technology capable of executing the narrow groove welding of a thick-wall steel plate or steel tube without need of any machining by using a conventional gas cutting or plasma cutting in the beveling. <P>SOLUTION: A method for executing the narrow groove welding of two steel plates or a steel tube as a workpiece to be welded includes: a step of executing the beveling by the gas cutting or the plasma cutting; a step of constituting a joint part by executing the temporary welding of a rectangular insert held by a joint part; a step of coating a deep penetration active material on an inner surface of a groove of the rectangular insert in the groove; and a step of executing the arc welding of the joint part. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
