PRODUCTION OF STEEL MATERIAL FROM INGOT

PRODUCTION OF STEEL MATERIAL FROM INGOT

PURPOSE:To produce a steel material having uniform internal quality and superior toughness by dispersing and reducing the segregation of the alloy elements and impurity elements existing in a continuously cast ingot by heating, hot working and heat-treating stages under specific conditions for the i...

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Hauptverfasser: IMAI SHIROU, KONNO TAKAHARU
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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creator IMAI SHIROU
KONNO TAKAHARU
description PURPOSE:To produce a steel material having uniform internal quality and superior toughness by dispersing and reducing the segregation of the alloy elements and impurity elements existing in a continuously cast ingot by heating, hot working and heat-treating stages under specific conditions for the ingot until it is made substantially harmless. CONSTITUTION:Sufficient working of >=20% reduction of area is applied to an ingot of >=A3 transformation point and
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CONSTITUTION:Sufficient working of &gt;=20% reduction of area is applied to an ingot of &gt;=A3 transformation point and &lt;=1,200 deg.C, whereby the defects or dislocations acting as points for initiation of diffusion are given. Thence, the ingot temp. after said working is controlled to the Ar1 transformation point or below, after which the ingot is subjected to a diffusion treatment by heating within 1,000-1,300 deg.C range, whereby the diffusion of the segregation elements in the ingot is accelerated considerably and the strength and toughness are improved. In this case, it is necessary to reheat the ingot to the range of 1,000 deg.C for 120-&lt;=180min from the temp. below the Ar1 transformaton point, 1,165 deg.C for 30-180min, 1,250 deg.C for 15-60min and 1,300 deg.C for &lt;=30min.</description><language>eng</language><subject>CHEMISTRY ; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS ; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</subject><creationdate>1982</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19820909&amp;DB=EPODOC&amp;CC=JP&amp;NR=S57145924A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76292</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19820909&amp;DB=EPODOC&amp;CC=JP&amp;NR=S57145924A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>IMAI SHIROU</creatorcontrib><creatorcontrib>KONNO TAKAHARU</creatorcontrib><title>PRODUCTION OF STEEL MATERIAL FROM INGOT</title><description>PURPOSE:To produce a steel material having uniform internal quality and superior toughness by dispersing and reducing the segregation of the alloy elements and impurity elements existing in a continuously cast ingot by heating, hot working and heat-treating stages under specific conditions for the ingot until it is made substantially harmless. CONSTITUTION:Sufficient working of &gt;=20% reduction of area is applied to an ingot of &gt;=A3 transformation point and &lt;=1,200 deg.C, whereby the defects or dislocations acting as points for initiation of diffusion are given. Thence, the ingot temp. after said working is controlled to the Ar1 transformation point or below, after which the ingot is subjected to a diffusion treatment by heating within 1,000-1,300 deg.C range, whereby the diffusion of the segregation elements in the ingot is accelerated considerably and the strength and toughness are improved. In this case, it is necessary to reheat the ingot to the range of 1,000 deg.C for 120-&lt;=180min from the temp. below the Ar1 transformaton point, 1,165 deg.C for 30-180min, 1,250 deg.C for 15-60min and 1,300 deg.C for &lt;=30min.</description><subject>CHEMISTRY</subject><subject>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</subject><subject>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</subject><subject>METALLURGY</subject><subject>METALLURGY OF IRON</subject><subject>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1982</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAPCPJ3CXUO8fT3U_B3UwgOcXX1UfB1DHEN8nT0UXAL8vdV8PRz9w_hYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxXgHBpuaGJqaWRiaOxsSoAQDwxCQt</recordid><startdate>19820909</startdate><enddate>19820909</enddate><creator>IMAI SHIROU</creator><creator>KONNO TAKAHARU</creator><scope>EVB</scope></search><sort><creationdate>19820909</creationdate><title>PRODUCTION OF STEEL MATERIAL FROM INGOT</title><author>IMAI SHIROU ; KONNO TAKAHARU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS57145924A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1982</creationdate><topic>CHEMISTRY</topic><topic>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</topic><topic>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</topic><topic>METALLURGY</topic><topic>METALLURGY OF IRON</topic><topic>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>IMAI SHIROU</creatorcontrib><creatorcontrib>KONNO TAKAHARU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>IMAI SHIROU</au><au>KONNO TAKAHARU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PRODUCTION OF STEEL MATERIAL FROM INGOT</title><date>1982-09-09</date><risdate>1982</risdate><abstract>PURPOSE:To produce a steel material having uniform internal quality and superior toughness by dispersing and reducing the segregation of the alloy elements and impurity elements existing in a continuously cast ingot by heating, hot working and heat-treating stages under specific conditions for the ingot until it is made substantially harmless. CONSTITUTION:Sufficient working of &gt;=20% reduction of area is applied to an ingot of &gt;=A3 transformation point and &lt;=1,200 deg.C, whereby the defects or dislocations acting as points for initiation of diffusion are given. Thence, the ingot temp. after said working is controlled to the Ar1 transformation point or below, after which the ingot is subjected to a diffusion treatment by heating within 1,000-1,300 deg.C range, whereby the diffusion of the segregation elements in the ingot is accelerated considerably and the strength and toughness are improved. In this case, it is necessary to reheat the ingot to the range of 1,000 deg.C for 120-&lt;=180min from the temp. below the Ar1 transformaton point, 1,165 deg.C for 30-180min, 1,250 deg.C for 15-60min and 1,300 deg.C for &lt;=30min.</abstract><oa>free_for_read</oa></addata></record>
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subjects CHEMISTRY
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
title PRODUCTION OF STEEL MATERIAL FROM INGOT
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