FORMATION OF WEAR-RESISTANT COATING

PURPOSE:To form easily a wear-resistant coating at a high product yield by sticking metallic powder consisting principally of Ni and Cr or further Co in addition thereto and contg. B, Si, Fe and C on the surface of a metallic body and heating the same to melt. CONSTITUTION:A metallic powder layer 5...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIWARA TETSUO, HATANAKA TATSUYA, HAGIWARA MITSUHARU
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To form easily a wear-resistant coating at a high product yield by sticking metallic powder consisting principally of Ni and Cr or further Co in addition thereto and contg. B, Si, Fe and C on the surface of a metallic body and heating the same to melt. CONSTITUTION:A metallic powder layer 5 consisting principally of Ni and Cr or Cr, Co and Ni, contg. B, Si, Fe and C as essential components and added with Mo, W, WC, etc. according to need is formed by a tacky adhesive agent or a thermal spraying method, etc. on the inside surface of a cylindrical metallic body 4 of a spacer, etc. for the control rod of a boiling water reactor and the metallic body is placed on a freely vertically movable and rotatable supporting base 1 in a vessel 8 for atmosphere. The above-mentioned metallic body 4 is kept rotated or moved upward and is heated to melt the metallic powder layer with the arc heat by an electrode 3 for arc as a heat source in a vacuum or inert atmosphere of Ar, etc. A wear-resistant coating is formed at a high product yield on the body 4 with the short treating stage by the above-mentioned treatment.