METHOD OF STRENGTHENING TREATMENT OF PARTS FROM HIGH-TEMPERATURE NITRIDE-, CARBIDE- AND BORIDE-FORMING MATERIALS SUBJECTED TO ION-IMPLANTATION MODIFICATION WITH NITROGEN, CARBON OR BORON

FIELD: mechanical engineering; may be used in treatment of parts operating under complicated loading conditions. SUBSTANCE: method includes performance of ion-implantation with nitrogen, carbon or born with energy of 30-50 keV, current density of 30-50 mcA/sq.cm and fluency of 1016-10 ion/sq.cm, pos...

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Bibliographische Detailangaben
Hauptverfasser:	SMYSLOV A.M, MASLOVA L.I
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 SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Zusammenfassung:	FIELD: mechanical engineering; may be used in treatment of parts operating under complicated loading conditions. SUBSTANCE: method includes performance of ion-implantation with nitrogen, carbon or born with energy of 30-50 keV, current density of 30-50 mcA/sq.cm and fluency of 1016-10 ion/sq.cm, postimplantation annealing at temperature of 450-550 C and pressure of residual gases of Pa for 1.5-3.5 h. Then part is subjected to sign-varying load with number of loading cycles more than 103-10 and stress whose magnitude is selected from the operating conditions of parts or equalling 0.3-0.4(Gs-Gy), where Gs is ultimate strength and Gy is yield strength of part material. EFFECT: higher service properties of parts due to provision in surface layers of discrete distribution of dislocations. 2 dwgu