コールドスプレー法を用いた高力黄銅膜形成の試み

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  • 西村 信一
    福田金属箔粉工業（株）技術本部研究開発部
  • 濱田 幸隆
    福田金属箔粉工業（株）技術本部研究開発部

書誌事項

タイトル別名
  • Feasibility Study of High-Strength Brass Coatings by Cold Spray Process
  • コールドスプレーホウ オ モチイタ コウリョク オウドウマク ケイセイ ノ ココロミ

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<p>Cu-Zn-based brasses possess excellent strength and corrosion resistance. However, producing bulk brass parts/bodies via conventional powder metallurgy has been difficult due to the high vapor pressure of Zn. This problem is circumvented in Cold Spray, in which solid powder particles, accelerated in a supersonic gas stream, are deposited on a substrate to form dense coatings without long exposure of powder particles to high temperature. In this study, a water-atomized Cu-Zn-Mn-Al-Fe brass powder about 30 μm in average diameter was cold sprayed with and without powder pre-annealing on an aluminum substrate in a nitrogen gas stream heated to 873 K. The as-atomized brass powder consisted predominantly of β solid solution, while the powder pre-annealed at 1023 K had both α and β solutions. Coatings with more than 3 mm in thickness and of nearly full density were produced with or without powder pre-annealing. An increase in deposition efficiency was noted with the coatings sprayed with the pre-annealed powder. Cold Spray provides a viable means for the fabrication of high-strength brass coatings.</p>

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