Multiplex rare-earth ferroalloy (RERAFe[2]) powder and method for preparing same

• Main Author: ZHILIN BAO
• Format: Patent
• Language: English
• Published: 15.08.2007
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention involves more than a kind of Yuan thin crude iron (RERAFe2) to gather the diamond dust and its the preparation method, should gather the diamond dust at least wilfully to select two kinds in oxidized rare earth Nd2O3, Dy2O3, Tb4O7, to make the oxidized rare earth blend for the raw material according to per cent by weight processing, then joins calcium metal grain of Ca again, powdered iron Fe, the chlorination salt (NaCl or CaCl2), makes the oxidized rare earth two blends according to the per cent by weight mix, this two blends take the reducing agent by the calcium metal grain of Canada chlorination salt, after stirs, the argon Ar clean positive pressure protection heats up carries on the return to original state proliferation response, soaks after cooling with the NH4Cl watery solution to the solution assumes the brown, Again uses the acetic acid watery solution to clean the PH value to assume the neutrality, finally filters except the moisture content and drying namely makes gathers the diamond dust. Should gather the diamond dust to be possible to take the key metal preparation rare earth permanent-magnet material, has the craft simply, the production cost low, the non- environmental pollution, the metal content is stable controllably, the alloy returns-ratio higher characteristic.