RAPID SINTERING OF POROUS COMPACTS

RAPID SINTERING OF POROUS COMPACTS

1281675 Sintering cemented carbide E I DU PONT DE NEMOURS & CO 24 June 1970 [31 July 1969] 30720/70 Heading C7D Green compacts of 97-75% WC with 3-25% CO and a green density > 30% theoretical are vacuum presintered to between 1100‹C and the eutectic temperature at a heating rate not more than...

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1. Verfasser: DONG M. CHAY
Format: Patent
Sprache:eng
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ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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description 1281675 Sintering cemented carbide E I DU PONT DE NEMOURS & CO 24 June 1970 [31 July 1969] 30720/70 Heading C7D Green compacts of 97-75% WC with 3-25% CO and a green density > 30% theoretical are vacuum presintered to between 1100‹C and the eutectic temperature at a heating rate not more than 10‹C/minute. They are the vacuum sintered at temperature T s for not more than 10 minutes and raised to Ts at a rate R s = (1.25M + 45) Œ10‹ C. per minute; where T s = The sintered body is cooled from T s to 800‹ C. in an oxygen free atmosphere in 4-30 minutes. The WC and CO have particle sizes 0.1-2 microns and 0.1-5 microns respectively. The powder mixture has a specific surface area of 1-7 sq. m/gm. and an oxygen content
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CHAY</creatorcontrib><description>1281675 Sintering cemented carbide E I DU PONT DE NEMOURS &amp; CO 24 June 1970 [31 July 1969] 30720/70 Heading C7D Green compacts of 97-75% WC with 3-25% CO and a green density &gt; 30% theoretical are vacuum presintered to between 1100‹C and the eutectic temperature at a heating rate not more than 10‹C/minute. They are the vacuum sintered at temperature T s for not more than 10 minutes and raised to Ts at a rate R s = (1.25M + 45) Œ10‹ C. per minute; where T s = The sintered body is cooled from T s to 800‹ C. in an oxygen free atmosphere in 4-30 minutes. The WC and CO have particle sizes 0.1-2 microns and 0.1-5 microns respectively. The powder mixture has a specific surface area of 1-7 sq. m/gm. and an oxygen content &lt;1% net. 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The powders after conventional wet ball milking and drying are compacted at 1, 000-100, 000 p. s. i. either hydraulically or isistatically.</description><subject>ALLOYS</subject><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1970</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAKcgzwdFEI9vQLcQ3y9HNX8HdTCPAP8g8NVnD29w1wdA4J5mFgTUvMKU7lhdLcDPJuriHOHrqpBfnxqcUFicmpeakl8aHBxqbGRiaWxo7GhFUAAMF2Iec</recordid><startdate>19701006</startdate><enddate>19701006</enddate><creator>DONG M. CHAY</creator><scope>EVB</scope></search><sort><creationdate>19701006</creationdate><title>RAPID SINTERING OF POROUS COMPACTS</title><author>DONG M. CHAY</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US3532493A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1970</creationdate><topic>ALLOYS</topic><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>DONG M. CHAY</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>DONG M. CHAY</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>RAPID SINTERING OF POROUS COMPACTS</title><date>1970-10-06</date><risdate>1970</risdate><abstract>1281675 Sintering cemented carbide E I DU PONT DE NEMOURS &amp; CO 24 June 1970 [31 July 1969] 30720/70 Heading C7D Green compacts of 97-75% WC with 3-25% CO and a green density &gt; 30% theoretical are vacuum presintered to between 1100‹C and the eutectic temperature at a heating rate not more than 10‹C/minute. They are the vacuum sintered at temperature T s for not more than 10 minutes and raised to Ts at a rate R s = (1.25M + 45) Œ10‹ C. per minute; where T s = The sintered body is cooled from T s to 800‹ C. in an oxygen free atmosphere in 4-30 minutes. The WC and CO have particle sizes 0.1-2 microns and 0.1-5 microns respectively. The powder mixture has a specific surface area of 1-7 sq. m/gm. and an oxygen content &lt;1% net. The powders after conventional wet ball milking and drying are compacted at 1, 000-100, 000 p. s. i. either hydraulically or isistatically.</abstract><oa>free_for_read</oa></addata></record>
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subjects ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title RAPID SINTERING OF POROUS COMPACTS
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