Effect of Assist Gas on Bead Formation in High Power Laser Welding(Welding Physics, Process & Instrument)
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概要
- 論文の詳細を見る
Role of assist gas in deep penetration welding in a high power CO_2 laser welding was studied. It is found that there exsists a transition pressure above and below which three different types of bead shape are produced. When the assist gas pressure is equal to or a little higher than that of plasma blow-out from beam hole, the penetration depth becomes deepest, and over this pressure the beam hole begins to be expanded from the surface reducing the wall-focusing effect. While at pressures higher than the transition one, whole beam hole is expanded and remelting by smooth molten metal flow increases penetration depth with no spiking and porosities.
- 大阪大学の論文
著者
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ARATA Yoshiaki
Osaka University
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Nishio Ryoji
Osaka University
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ODA Tatsuharu
Nishin Shisetsu Kogyo K.K.
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