Production of Amorphous Fe–Ni Based Alloys by Flame-Spray Quenching

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  • Miura Harumatsu
    Department of Iron and Steel Engineering, Iron and Steel Technical College
  • Isa Shigeteru
    Department of Iron and Steel Engineering, Iron and Steel Technical College
  • Omuro Keisuke
    Department of Mechanical Engineering, Iron and Steel Technical College
  • Tanigami Nozomu
    Faculty of Science and Technology, Kinki University

書誌事項

タイトル別名
  • Production of Amorphous Fe–Ni Based Alloys by Flame-Spray Quenching

抄録

A study of the production of amorphous alloys by a flame-spray quenching in air was performed on the (Fe1−xNix)80P14B6 alloy system with 0.1≤x≤0.9. The spray-quenching system was composed basically of the spray gun of the oxyacetylene type and the water-cooled copper plate as the cold substrate. To make the quenching more effective, the gun traverse rate was moderately controlled and the argon gas blowing around the flame and the liquid carbon dioxide blowing on the substrate were additionally done. The spray-quenched alloy samples were examined to check the progress of glass formation mainly by X-ray diffraction and differential scanning calorimetry.<BR>By controlling the gun traverse rate much faster than that in the ordinary spraying practice and by doing the argon blowing adequately to adjust the flame temperature as well as to suppress oxidation of the metal stream, the effect of quenching was remarkably improved. It was found that by means of the liquid carbon dioxide blowing, oxidation of the deposit alloy was prevented due to the carbon dioxide gas-shielding effect being generated on the substrate and hence effectiveness of the quenching itself was strikingly improved.<BR>When only control of the gun traverse rate and the argon gas blowing of these additional operations were performed on a series of nine alloys in the spray-quenching, amorphous flakes were easily obtained in all but the alloys with x≤0.3. Furthermore, by carring out the carbon dioxide blowing together with the above operations, also an amorphous sheet about 150 μm thick of the Fe40Ni40P14B6 alloy was prepared without difficulty.<BR>The flame-spray quenching method presented in this paper appears to be able to be applied also for production of thicker amorphous alloy sheets as well as their flakes in quantities in a wide variety of alloy systems, prepared to be homogeneous in composition, including the present alloy system by further improvement of spray-quenching conditions.

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