プラズマアーク粉体アロイング法によるＡｌ合金表面へのＴｉＣ粒子アロイング層形成条件の検討

• 松田 福久

  大阪大学溶接工学研究所

• 中田 一博

  大阪大学溶接工学研究所

• 徐 昌済

  成均館大学校金属工学科

• 橋本 武典

  大阪大学大学院

書誌事項

タイトル別名

• Effect of Process Parameter on Formation of Alloyed Layer on Aluminum Alloy Surface by PTA Powder Alloying Process.

抄録

The effect of alloying conditions on the formation of alloyed layer on A5083 aluminum alloy surface has been investigated by using plasma transferred arc (PTA) process with TiC as powder alloyed material.<BR>As process parameters, electrode polarity, kind of shielding gas, plasma arc current, powder feeding rate and travel speed were discussed.<BR>The alloying conditions were 100-250 A in plasma arc current, 100-1000 mm/min in travel speed, 5-15 g/min in powder feeding rate with different combination of polarity and shielding gas, namely DCEN-Ar, AC-Ar and DCEN-He.<BR>Alloyed layer with smooth surface can be easily obtained by PTA process with DCEN-He and AC -Ar, but was difficult with DCEN-Ar because molten pool surface was covered with thick oxide film which prevented smooth injection of TiC powder into molten pool.<BR>Higher arc current and lower travel speed made easy to form the alloyed layer.<BR>Injection efficiency (ratio of the gained TiC amount in alloyed layer to TiC amount fed) increased with the increase of a surface area of molten pool and reached almost 100% in DCEN-He.<BR>Volume fraction of TiC in alloyed layer increased with the increase of plasma arc current and powder feeding rate, but was likely to saturate to a limited value.<BR>It was made clear that DCEN-He was the most superior process to show the wider optimum range of alloying conditions even at high travel speed of 500 mm/min and large injection efficiency and volume fraction of TiC than AC-Ar and DCEN-Ar.<BR>This beneficial effect of DCEN-He in PTA process was consider to high temperature of molten pool surface about 1000°C in DCEN-He, which was much higher in AC-Ar of about 700°C, because this high temperature of molten pool enabled the smooth injection of TiC particle into molten Al pool due to good wettability between TiC particle and molten Al.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 13 (3), 395-403, 1995

  一般社団法人 溶接学会

キーワード

• Aluminum Alloy
• Metal matrix composite
• Plasma Transferred Arc welding
• Ceramics powder
• TiC powder
• Alloyed layer
• Particle dispersion
• Overlaying

詳細情報

• CRID: 1390282679700972416
• NII論文ID: 130003764458
• DOI: 10.2207/qjjws.13.395
• ISSN: 24348252
• ISSN: 02884771
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可