POWDER METALLURGICAL METHOD
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United States of America Patent
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Jun 2, 2016
app pub date -
Oct 30, 2015
filing date -
Oct 30, 2015
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Abstract
A powder metallurgical method includes preparing a liquid lubricant by mixing ethylene bis stearamide 60 to 70 wt % and erucamide 30 to 40 wt % at 150 to 170° C. in a high temperature stirring process. A pulverized solid lubricant is prepared by cooling the liquid lubricant to form a solid and pulverizing the solid. A powder metallurgy composition is prepared by mixing the pulverized solid lubricant 0.4 to 0.75 part by weight to metal-based powder 100 parts by weight, and a molded body is prepared by compression molding of the powder metallurgy composition.
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