METHOD OF MANUFACTURING SINTERED FERROMOLYBDENUM ALLOY FROM MIXED POWDER OF MILL SCALE AND MOLYBDENUM OXIDE POWDER BY SOLID GAS REACTION
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United States of America Patent
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Issued Date -
Jun 21, 2012
app pub date -
Aug 22, 2011
filing date -
Aug 24, 2010
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Abandoned
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Abstract
The present invention relates to a method for manufacturing a sintered ferromolybdenum alloy, in which a mixed powder of a mill scale (a mixture of Fe, FeO and Fe2O3) as a ferrous raw material discharged from a hot rolling and forging process of the steel-making process and a molybdenum oxide powder as a molybdenum raw material is primarily reduced with a hydrogen gas at low temperature, and then is secondarily reduced with the hydrogen gas at high temperature and simultaneously is cooled in a hydrogen atmosphere to thereby obtain a ferromolybdenum alloy in the form of a powder, and subsequently the obtained ferromolybdenum alloy powder is mixed with wax (Kenolube P11) and the wax-containing mixture is compacted or pressure-molded, after which the molded product is heat-treated in a hydrogen gas atmosphere and then is cooled, thereby manufacturing a sintered ferromolybdenum alloy, and a sintered product manufactured by said method.
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