| 摘要 |
PURPOSE:To improve plasma joining and welding by incorporating iron powder into a powder material to be used as a filler metal for plasma joining and welding and specifying the grain size of the powder material to a specific range. CONSTITUTION:The powder material as the filler metal is maintained within an about 20-350 mesh range. Powder of a carbon steel, etc., and reduced iron powder are used for the iron powder of the above-mentioned powder material. Such powder material is thrown into a plasma arc from between a nozzle 3 and a tip 2 and a bead 7 of the required shape is formed by taking care for allowing the arc to exist on a pool 6. Joining and welding of not only thin sheets but also thick plates is made possible by using such powder material and deposition efficiency and bead characteristic are improved.
|
