HIGHLY CORROSION RESISTANT WEAR RESISTANT MEMBER FOR FORMING THERMAL SPRAYED LAYER, AND POWDER FOR FORMING THERMAL SPRAYED LAYER FORMING THE SAME

• Main Authors: IWANAGA KENGO, HIRATA HIROO, YAMAZAKI YUJI
• Format: Patent
• Language: English
• Published: 02.04.2009
• Subjects: ALLOYS; 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; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a corrosion resistant and wear resistant member obtained by forming a thermal sprayed layer having corrosion resistance and wear resistance on the surface of a metal member contacted with a resin generating a strong corrosive gas, and to provide thermal spraying powder. SOLUTION: Disclosed is a corrosion resistant and wear resistant member in which metal powder is thermally sprayed on a metal base material, thus a thermal sprayed layer is formed on the surface of the metal base material, and is characterized in that the thermal sprayed layer is a tetragonal Mo2(Ni, Cr)B2-based or tetragonal Mo2(Ni, Cr, V)B2-based double boride cermet. Also disclosed is powder for forming a thermal sprayed layer composed of a tetragonal Mo2(Ni, Cr)B2-based double boride cermet and having a composition composed of, by mass, 4.0 to 6.5% B, 39.0 to 64.0% Mo, 7.5 to 20.0% Cr, and the balance ≥5% Ni with inevitable elements. COPYRIGHT: (C)2009,JPO&INPIT