Formation of Surface Coating with Mechanically Ground Ni Matrix Composite Powder on Iron Castings

DOI Web Site 6 References
  • Michiura Yoshisada
    R & D Department of Pipe Company, Kurimoto, Ltd.
  • Horikawa Yasuo
    Graduate School, Osaka Prefecture University [(Present) Borg-Warner Automotive K. K.]
  • Tanabe Shigenori
    Metallurgy and Materials Science, College of Engineering, Osaka Prefecture University
  • Kohzu Masahide
    Metallurgy and Materials Science, College of Engineering, Osaka Prefecture University
  • Higashi Kenji
    Metallurgy and Materials Science, College of Engineering, Osaka Prefecture University
  • Nakamura Kimio
    R & D Department of Pipe Company, Kurimoto, Ltd.
  • Kitagawa Masayoshi
    R & D Department of Pipe Company, Kurimoto, Ltd.

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Other Title
  • メカニカルグラインディングしたNi基複合粉末による鋳鉄への表面被覆層形成
  • メカニカルグラインディング シタ Niキ フクゴウ フンマツ ニ ヨル チュウテツ エ ノ ヒョウメン ヒフクソウ ケイセイ

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Abstract

  The coating on iron castings was prepared using mechanically ground (MG) composite powder consisting of Ni powder and low melting point Ni-P powder as the coating powder with no segregation of the compositions on the mold. Several properties of the coated iron castings obtained were tested. The main results are as follows :<br>(1) Only when the MG time exceeds 36ks, the composite powder becomes even, and use of this powder produces a coating with no segregation of Ni and P. <br>(2) Compared with mixed powder, the composite powder dissolves the castings less. This enable the formation of a Ni rich coating layer with smaller amounts of powder in 10 mm thin castings. This coating showed good performance in salt spray corrosion test.

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