MANUFACTURE OF EXPANSIBLE ANCHOR CONSISTING OF CORROSION-RESISTANT STEEL

PROBLEM TO BE SOLVED: To heighten hardness of an expansion body by enriching a non-metal component such as carbon, nitrogen and/or boron in an anti-corrosion steel processing material, performing aging heat treatment, and depositing them as a carbide, a nitride and/or a boride respectively. SOLUTION...

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Bibliographische Detailangaben
Hauptverfasser:	NORUBERUTO ARUNORUTO, PAURU GIYUNPERU, BERUNTO HAIN
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING 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 EARTH DRILLING FERROUS OR NON-FERROUS ALLOYS FIXED CONSTRUCTIONS GALLERIES GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LARGE UNDERGROUND CHAMBERS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY METALLURGY OF IRON MINING MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY SHAFTS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS TUNNELS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To heighten hardness of an expansion body by enriching a non-metal component such as carbon, nitrogen and/or boron in an anti-corrosion steel processing material, performing aging heat treatment, and depositing them as a carbide, a nitride and/or a boride respectively. SOLUTION: Anti-corrosion steel containing interstitial dissolved non-metal, for instance, much of carbon, nitrogen and/or boron is used as an anti-corrosion processing material of an expansion body inserted in an compressible sleeve. Depositing forming alloy elements such as carbon, nitrogen and/or boron are mixed with a metal powder having a basic composition, the expansion body is injected and molded by an injection and molding device, and aging heat treatment is performed after a binder is removed and sintering is carried out. At this time carbon, nitrogen and/or boron are deposited as very hard particle of carbide, nitride and/or boride respectively. As a result, hardness of the expansion body is heightened together with the effect wherein a tendency of adherence and bite is lowered at a old time, and preferred and everlasting sliding characteristics are ensured during an expansion process in concrete with cracks and after the expansion thereof.