Method for deoxidizing powder of multielement composite rare earth rare tungsten

This invention relates to a reduction method for preparing multi-component composite rare earth W powder. The average particle size of multi-component composite rare earth W powder prepared by traditional process is 0.9-1 mu.m, and the powder is sensitive to the following sintering and processing pr...

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Bibliographic Details
Main Author BINGSHAN,NIE LI
Format Patent
LanguageEnglish
Published 10.10.2007
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
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Summary:This invention relates to a reduction method for preparing multi-component composite rare earth W powder. The average particle size of multi-component composite rare earth W powder prepared by traditional process is 0.9-1 mu.m, and the powder is sensitive to the following sintering and processing procedures, thus the process is difficult to control, and the product qualification rate is low. The method reduces the first reduction temperature, and raises the second reduction temperature. The temperature distribution from the raw material feeding mouth in the first reduction is 440-460 deg.C, 490-520 deg.C, 540-560 deg.C, 610-630 deg.C and 540-560 deg.C. The temperature distribution from the raw material feeding mouth in the second reduction is 740-760 deg.C, 840-860 deg.C, 940-960 deg.C, 940-960 deg.C and 840-860 deg.C. The average particle size of the obtained multi-component composite rare earth W powder is 1.2-1.6 mu.m. The powder has such advantages as appropriate activity, easy control of following sintering, high qualification rate (higher than 75%), and low electricity consumption (reduced by 5%).
Bibliography:Application Number: CN2007199088