METHOD FOR PRODUCING HIGH-STRENGTH SINTERED COMPACT AND HIGH-STRENGTH SINTERED COMPACT PRODUCTION SYSTEM
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United States of America Patent
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Issued Date -
Dec 19, 2013
app pub date -
Dec 8, 2011
filing date -
Dec 8, 2010
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Abandoned
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Abstract
A method for producing a high-strength sintered compact includes a press molding step and a sintering step, the press molding step including a first press molding step and a second press molding step, a heating step being provided between the first press molding step and the second press molding step, the first press molding step applying a first pressure to the mixed powder in a first die at room temperature that is less than a melting point of the lubricant powder to form a primary green compact, the heating step heating the primary green compact to the melting point of the lubricant powder, and the second press molding step applying a second pressure to the primary green compact in a second die at the melting point of the lubricant powder to form a densified secondary green compact, the second die being pre-heated to the melting point of the lubricant powder.
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