Laser Beam Cladding Characteristics of Chromium-Based Alloy on Carbon Steel

• Kataoka Yoshihiro

  Department of Production Mechanical Engineering, Polytechnic University

• Yoshinaka Tatsuya

  Graduate School, Polytechnic University

• Miyazaki Toshiyuki

  Department of Precision Mechanical Engineering, Chiba Institute of Technology

• Umeda Takateru

  Graduate School of Engineering, The University of Tokyo

Bibliographic Information

Other Title

• 炭素鋼へのクロム基合金のレーザ肉盛り特性
• タンソ コウ エ ノ クロムキ ゴウキン ノ レーザ ニクモリ トクセイ

Abstract

  CO₂ laser beam was applied to the cladding of chromium alloy using a beam scanner. The hardness and microstructure of the clad layer were investigated by changing the laser power, number of clad layers and overlapped width of the laser beam. The average hardness of the clad layer obtained was 550∼600 HV 0.1, when the conditions were; laser power of 2500 W to 2900 W, clad number of one layer to two layers (thickness of clad layer ; 0.85∼1.90 mm), overlapped width of 0.5 mm, cladding speed of 400 mm/min, defocusing distance of 30 mm, oscillated width of 7 mm and argon as the shielding gas. The microstructure of clad layer was completely transformed into a fine dendritic structure (secondary dendrite arm spacing ; 3∼5 μm) and eutectic structure by the rapid solidification conditions. A heat affected zone was produced on the surface of the carbon steel (base metal) and a martensitic structure could be observed. The heat affected zone was then heat treated also with CO₂ laser beam. The martensitic structure (700 HV 0.1) of the heat affected zone transformed into troostite. EPMA line analysis indicated that an alloyed layer (thickness ; 20∼30 μm) exists between the clad layer and base metal. These results show that CO₂ laser beam cladding of chromium-based alloy serves as a new surface treatment process for carbon steel.

Journal

• Journal of Japan Foundry Engineering Society

  Journal of Japan Foundry Engineering Society 71 (3), 159-164, 1999

  Japan Foundry Engineering Society

Keywords

• laser beam cladding
• chromium-based alloy
• heat affected zone
• heat treatment
• alloyed layer

Details

• CRID: 1390282681483014912
• NII Article ID: 10002554881
• NII Book ID: AN10514770
• DOI: 10.11279/jfes.71.159
• ISSN: 21855374
• ISSN: 13420429
• NDL BIB ID: 4683494
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4683494
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed