HIGH STRENGTH MULTIPHASE STEEL, PRODUCTION METHOD AND USE
The invention deals with a cold rolled and hot dip steel sheet, with a tensile strength of at least 980 MPa, with yield strength above or equal to 500 MPa, with total elongation above or equal to 8%, the composition consisting by weight percent: 0.05 < C < 0.15%, 2 < Mn 3%, Al < 0.1 %, 0...
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| creator | FAN, DONGWEI JUN, HYUN JO ROTOLE, JOHN A |
| description | The invention deals with a cold rolled and hot dip steel sheet, with a tensile strength of at least 980 MPa, with yield strength above or equal to 500 MPa, with total elongation above or equal to 8%, the composition consisting by weight percent: 0.05 < C < 0.15%, 2 < Mn 3%, Al < 0.1 %, 0.3 < Si < 1.5%, 0.01 % < Nb < 0.05%, N < 0.02%, 0.1 < Cr + Mo < 1 %, 0.0001 < B < 0.0025, Ti < 0.5%, V < 0.01 %, S < 0.01 %, P < 0.05% the remainder of the composition being iron and unavoidable impurities resulting from the smelting and the microstructure contains, in surface fraction: between 50 and 95% of martensite and between 5 and 50% of the sum of ferrite and bainite, wherein the ferrite grain size is below pm, and wherein the aspect ratio of the ferrite grain size is between 1 and 3. The steel according to the invention is oxidized and subsequently reduced during heating, soaking and cooling steps of the annealing.
L'invention concerne une tôle d'acier laminée à froid et immergée à chaud qui présente une résistance à la traction d'au moins 980 MPa, une limite d'élasticité supérieure ou égale à 500 MPa, un allongement total supérieur ou égal à 8 %. La composition est constituée en pourcentage en poids : 0,05 < C < 0,15 %, 2 < Mn = 3 %, Al < 0,1 %, 0,3 < Si < 1,5 %, 0,01 % < Nb < 0,05 %, N < 0,02 %, 0,1 < Cr + Mo < 1 %, 0,0001 < B < 0,0025, Ti < 0,5 %, V < 0,01 %, S < 0,01 %, P < 0,05 %, le reste de la composition étant du fer et des impuretés inévitables résultant de la fusion, et la microstructure contenant en fraction surfacique : entre 50 et 95 % de martensite et entre 5 et 50 % de la somme de ferrite et de bainite, la taille des grains de ferrite étant inférieure à 10 µm, et le rapport d'aspect de la taille des grains de ferrite étant compris entre 1 et 3. L'acier selon l'invention est oxydé et ultérieurement réduit pendant les étapes de chauffage, de maintien à température et de refroidissement du recuit. |
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L'invention concerne une tôle d'acier laminée à froid et immergée à chaud qui présente une résistance à la traction d'au moins 980 MPa, une limite d'élasticité supérieure ou égale à 500 MPa, un allongement total supérieur ou égal à 8 %. La composition est constituée en pourcentage en poids : 0,05 < C < 0,15 %, 2 < Mn = 3 %, Al < 0,1 %, 0,3 < Si < 1,5 %, 0,01 % < Nb < 0,05 %, N < 0,02 %, 0,1 < Cr + Mo < 1 %, 0,0001 < B < 0,0025, Ti < 0,5 %, V < 0,01 %, S < 0,01 %, P < 0,05 %, le reste de la composition étant du fer et des impuretés inévitables résultant de la fusion, et la microstructure contenant en fraction surfacique : entre 50 et 95 % de martensite et entre 5 et 50 % de la somme de ferrite et de bainite, la taille des grains de ferrite étant inférieure à 10 µm, et le rapport d'aspect de la taille des grains de ferrite étant compris entre 1 et 3. L'acier selon l'invention est oxydé et ultérieurement réduit pendant les étapes de chauffage, de maintien à température et de refroidissement du recuit.]]></description><language>eng ; fre</language><subject>ALLOYS ; CHEMICAL SURFACE TREATMENT ; CHEMISTRY ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING MATERIAL WITH METALLIC MATERIAL ; COATING METALLIC MATERIAL ; DIFFUSION TREATMENT OF METALLIC MATERIAL ; FERROUS OR NON-FERROUS ALLOYS ; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS ; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL ; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2023</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&date=20230801&DB=EPODOC&CC=CA&NR=2951215C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20230801&DB=EPODOC&CC=CA&NR=2951215C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FAN, DONGWEI</creatorcontrib><creatorcontrib>JUN, HYUN JO</creatorcontrib><creatorcontrib>ROTOLE, JOHN A</creatorcontrib><title>HIGH STRENGTH MULTIPHASE STEEL, PRODUCTION METHOD AND USE</title><description><![CDATA[The invention deals with a cold rolled and hot dip steel sheet, with a tensile strength of at least 980 MPa, with yield strength above or equal to 500 MPa, with total elongation above or equal to 8%, the composition consisting by weight percent: 0.05 < C < 0.15%, 2 < Mn 3%, Al < 0.1 %, 0.3 < Si < 1.5%, 0.01 % < Nb < 0.05%, N < 0.02%, 0.1 < Cr + Mo < 1 %, 0.0001 < B < 0.0025, Ti < 0.5%, V < 0.01 %, S < 0.01 %, P < 0.05% the remainder of the composition being iron and unavoidable impurities resulting from the smelting and the microstructure contains, in surface fraction: between 50 and 95% of martensite and between 5 and 50% of the sum of ferrite and bainite, wherein the ferrite grain size is below pm, and wherein the aspect ratio of the ferrite grain size is between 1 and 3. The steel according to the invention is oxidized and subsequently reduced during heating, soaking and cooling steps of the annealing.
L'invention concerne une tôle d'acier laminée à froid et immergée à chaud qui présente une résistance à la traction d'au moins 980 MPa, une limite d'élasticité supérieure ou égale à 500 MPa, un allongement total supérieur ou égal à 8 %. La composition est constituée en pourcentage en poids : 0,05 < C < 0,15 %, 2 < Mn = 3 %, Al < 0,1 %, 0,3 < Si < 1,5 %, 0,01 % < Nb < 0,05 %, N < 0,02 %, 0,1 < Cr + Mo < 1 %, 0,0001 < B < 0,0025, Ti < 0,5 %, V < 0,01 %, S < 0,01 %, P < 0,05 %, le reste de la composition étant du fer et des impuretés inévitables résultant de la fusion, et la microstructure contenant en fraction surfacique : entre 50 et 95 % de martensite et entre 5 et 50 % de la somme de ferrite et de bainite, la taille des grains de ferrite étant inférieure à 10 µm, et le rapport d'aspect de la taille des grains de ferrite étant compris entre 1 et 3. L'acier selon l'invention est oxydé et ultérieurement réduit pendant les étapes de chauffage, de maintien à température et de refroidissement du recuit.]]></description><subject>ALLOYS</subject><subject>CHEMICAL SURFACE TREATMENT</subject><subject>CHEMISTRY</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING MATERIAL WITH METALLIC MATERIAL</subject><subject>COATING METALLIC MATERIAL</subject><subject>DIFFUSION TREATMENT OF METALLIC MATERIAL</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</subject><subject>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</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><subject>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLD08HT3UAgOCXL1cw_xUPAN9QnxDPBwDHYFirm6-ugoBAT5u4Q6h3j6-yn4uoZ4-LsoOPq5KIQGu_IwsKYl5hSn8kJpbgZ5N9cQZw_d1IL8-NTigsTk1LzUknhnRyNLU0MjQ1NnY8IqAPJYJ9Q</recordid><startdate>20230801</startdate><enddate>20230801</enddate><creator>FAN, DONGWEI</creator><creator>JUN, HYUN JO</creator><creator>ROTOLE, JOHN A</creator><scope>EVB</scope></search><sort><creationdate>20230801</creationdate><title>HIGH STRENGTH MULTIPHASE STEEL, PRODUCTION METHOD AND USE</title><author>FAN, DONGWEI ; JUN, HYUN JO ; ROTOLE, JOHN A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2951215C3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2023</creationdate><topic>ALLOYS</topic><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</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><topic>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>FAN, DONGWEI</creatorcontrib><creatorcontrib>JUN, HYUN JO</creatorcontrib><creatorcontrib>ROTOLE, JOHN A</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>FAN, DONGWEI</au><au>JUN, HYUN JO</au><au>ROTOLE, JOHN A</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>HIGH STRENGTH MULTIPHASE STEEL, PRODUCTION METHOD AND USE</title><date>2023-08-01</date><risdate>2023</risdate><abstract><![CDATA[The invention deals with a cold rolled and hot dip steel sheet, with a tensile strength of at least 980 MPa, with yield strength above or equal to 500 MPa, with total elongation above or equal to 8%, the composition consisting by weight percent: 0.05 < C < 0.15%, 2 < Mn 3%, Al < 0.1 %, 0.3 < Si < 1.5%, 0.01 % < Nb < 0.05%, N < 0.02%, 0.1 < Cr + Mo < 1 %, 0.0001 < B < 0.0025, Ti < 0.5%, V < 0.01 %, S < 0.01 %, P < 0.05% the remainder of the composition being iron and unavoidable impurities resulting from the smelting and the microstructure contains, in surface fraction: between 50 and 95% of martensite and between 5 and 50% of the sum of ferrite and bainite, wherein the ferrite grain size is below pm, and wherein the aspect ratio of the ferrite grain size is between 1 and 3. The steel according to the invention is oxidized and subsequently reduced during heating, soaking and cooling steps of the annealing.
L'invention concerne une tôle d'acier laminée à froid et immergée à chaud qui présente une résistance à la traction d'au moins 980 MPa, une limite d'élasticité supérieure ou égale à 500 MPa, un allongement total supérieur ou égal à 8 %. La composition est constituée en pourcentage en poids : 0,05 < C < 0,15 %, 2 < Mn = 3 %, Al < 0,1 %, 0,3 < Si < 1,5 %, 0,01 % < Nb < 0,05 %, N < 0,02 %, 0,1 < Cr + Mo < 1 %, 0,0001 < B < 0,0025, Ti < 0,5 %, V < 0,01 %, S < 0,01 %, P < 0,05 %, le reste de la composition étant du fer et des impuretés inévitables résultant de la fusion, et la microstructure contenant en fraction surfacique : entre 50 et 95 % de martensite et entre 5 et 50 % de la somme de ferrite et de bainite, la taille des grains de ferrite étant inférieure à 10 µm, et le rapport d'aspect de la taille des grains de ferrite étant compris entre 1 et 3. L'acier selon l'invention est oxydé et ultérieurement réduit pendant les étapes de chauffage, de maintien à température et de refroidissement du recuit.]]></abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | HIGH STRENGTH MULTIPHASE STEEL, PRODUCTION METHOD AND USE |
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