Surface Hardening of Cast Irons by Laser Alloying of Carbide Forming Element

• Tsujikawa Masato

  大阪府立大学工学部　工博

• Yoshida Nozomi

  同大学大学院〔現　関西ロール（株）〕

• Kawamoto Makoto

  大阪府立大学工学部　工博

• Hino Makoto

  岡山県工業技術センター

Bibliographic Information

Other Title

• 炭化物生成元素のレーザ合金化による鋳鉄表面の硬化
• タンカブツ セイセイ ゲンソ ノ レーザ ゴウキンカ ニヨル チュウテツ ヒョ

Abstract

  Laser surface alloying of cast irons was carried out to obtain harder surface by carbide formation of alloyed element and graphite in the substrates. The alloying elements used were chromium or tungsten. To feed the alloying elements, a powder coated layer or electro plated layer was formed on the surface of the specimens prior to laser irradiation. Alloyed structures were obtained under the proper treatment conditions and X-ray diffraction tests showed that the modified structure with chromium powder layer contains chromium carbide (Cr₇C₃). Their microhardness was 950HV. The microstructures of tungsten treated speci-mens have primary dendrites and tungsten rich smooth matrix. X-ray diffraction also revealed the presence of W and Fe complex carbide and cementite. The microhardness of the tungsten alloyed structure, which is higher than that of melted-solidified structure without alloying element, was 1300HV.

Journal

• Journal of Japan Foundry Engineering Society

  Journal of Japan Foundry Engineering Society 68 (8), 657-661, 1996

  Japan Foundry Engineering Society

Details

• CRID: 1390282681482862464
• NII Article ID: 10002113854
• NII Book ID: AN10514770
• DOI: 10.11279/jfes.68.657
• ISSN: 21855374
• ISSN: 13420429
• NDL BIB ID: 4021295
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4021295
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed