1989 Fiscal Year Final Research Report Summary
Properties of Functional Surface Layers by Surface Modification Processes
| Project/Area Number |
61420041
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
溶接工学
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| Research Institution | Osaka university |
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Principal Investigator |
MATSUDA Fukuhisa Welding Research Institute, Osaka University, Professor, 溶接工学研究所, 教授 (90028994)
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| Co-Investigator(Kenkyū-buntansha) |
NAKATA Kazuhiro Welding Research Institute, Osaka University, Research Assistant, 溶接工学研究所, 助手 (80112069)
NAKAGAWA Hiroji Welding Research Institute, Osaka University, Research Assistant, 溶接工学研究所, 助手 (40029351)
USHIO Masao Welding Research Institute, Osaka University, Associate Professor, 溶接工学研究所, 助教授 (80029248)
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| Project Period (FY) |
1986 – 1989
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| Keywords | Surface Modification / Ceramics Coating / Spattering / Plasma CVD / Plasma Surfacing / Laser Alloying / Arc Alloying / Diffusion Alloying |
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| Research Abstract |
Using the processes of diffusion, plasma CVD, arc spattering, plasma nitriding, arc and laser alloying, ceramics coating and metal alloying layers were made on various nonferrous metals and stainless steels. The aim of this research is to make a medium thick layer as 10mum to 1mm. In order to make a medium thick layer the optimum condition was investigated for various processes. Nextly the physical properties of the layers obtained were investigated by means of crystallography, metallography and mechanical evaluation. Main conclusions obtained are as follows; 1. Laser and arc alloying processed could make a layer of several hundred microns to several millimeters with surface melting of base metal. The properties of alloyed layers was depended on combination of additives and base metal and cooling rate. 2. Diffusion alloying processes could make a layer of several tens to several hundred microns with an excellent bonding to base metal. The metallurgical properties of the layers obtained could be estimated through the equilibrium diagrams of binary alloy. 3. Coating processes as plasma CVD and arc spattering could made a thin film layer as several to ten microns irrespective of material of base metal. However the bonding properties of the film was a problem when thicker film is deposited. The improvement of bonding properties of this film will be future task.
In this research the authors have obtained many informations for making a medium thicker film or alloyed layer which has many benefits for mechanical use in industrial fields. Recently a medium thick surface hardening of aluminum is required in many industries. The result of this research will support the development of the requirement in the future.
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Research Products
(44 results)
