HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THE SAME
To provide a high-strength steel sheet that has a tensile strength of 1180 MPa or more, a uniform elongation of 6% or more, and an impact fracture resistance.SOLUTION: Provided is a high-strength steel sheet that has a component composition which contains, in mass%, C: 0.10 to 0.20%, Si: 0.7 to 1.4%...
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| creator | GOTO SOTA DOAN THI HUYEN HASEGAWA HIROSHI KIMURA HIDEYUKI UMINO TAKANORI |
| description | To provide a high-strength steel sheet that has a tensile strength of 1180 MPa or more, a uniform elongation of 6% or more, and an impact fracture resistance.SOLUTION: Provided is a high-strength steel sheet that has a component composition which contains, in mass%, C: 0.10 to 0.20%, Si: 0.7 to 1.4%, Mn: 2.3 to 4.0%, P: 0.10% or less, S: 0.03% or less, Al: 0.001 to 2.0%, N: 0.01% or less, O: 0.01% or less, and B: 0.0005 to 0.010%, has the balance of Fe and unavoidable impurities and MSC of 3.0 to 4.2 mass%, has a microstructure containing upper bainite by 70% or more in area fraction, and fresh martensite and retained austenite by 7 to 30% in total area fraction in which the area fraction of the retained austenite is 2% or more, and has a mechanical characteristic in which the uniform elongation is 6% or higher, the tensile strength is 1180 MPa or more, and the impact value at -40°C in the press notched Charpy test is 8 J/cm2 or more.SELECTED DRAWING: None
【課題】１１８０ＭＰａ以上の引張強度、６％以上の一様伸び、衝撃破壊抵抗有する高強度鋼板の提供。【解決手段】質量％で、Ｃ：０．１０〜０．２０％、Ｓｉ：０．７〜１．４％、Ｍｎ：２．３〜４．０％、Ｐ：０．１０％以下、Ｓ：０．０３％以下、Ａｌ：０．００１〜２．０％、Ｎ：０．０１％以下、Ｏ：０．０１％以下、およびＢ：０.０００５〜０．０１０％を含有し、残部Ｆｅおよび不可避的不純物からなり、ＭＳＣが３．０〜４．２質量％である成分組成を有し、面積分率で７０％以上の上部ベイナイト、合計面積分率で７〜３０％のフレッシュマルテンサイトおよび残留オーステナイトとを含み、かつ、前記残留オーステナイトの面積分率が２％以上であるミクロ組織を有し、一様伸びが６％上、引張強度が１１８０ＭＰａ以上、かつプレスノッチシャルピー試験における−４０℃での衝撃値が８Ｊ／ｃｍ2以上である機械的特性を有する、高強度鋼板。【選択図】なし |
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【課題】１１８０ＭＰａ以上の引張強度、６％以上の一様伸び、衝撃破壊抵抗有する高強度鋼板の提供。【解決手段】質量％で、Ｃ：０．１０〜０．２０％、Ｓｉ：０．７〜１．４％、Ｍｎ：２．３〜４．０％、Ｐ：０．１０％以下、Ｓ：０．０３％以下、Ａｌ：０．００１〜２．０％、Ｎ：０．０１％以下、Ｏ：０．０１％以下、およびＢ：０.０００５〜０．０１０％を含有し、残部Ｆｅおよび不可避的不純物からなり、ＭＳＣが３．０〜４．２質量％である成分組成を有し、面積分率で７０％以上の上部ベイナイト、合計面積分率で７〜３０％のフレッシュマルテンサイトおよび残留オーステナイトとを含み、かつ、前記残留オーステナイトの面積分率が２％以上であるミクロ組織を有し、一様伸びが６％上、引張強度が１１８０ＭＰａ以上、かつプレスノッチシャルピー試験における−４０℃での衝撃値が８Ｊ／ｃｍ2以上である機械的特性を有する、高強度鋼板。【選択図】なし</description><language>eng ; jpn</language><subject>ALLOYS ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; 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 ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2021</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=20210927&DB=EPODOC&CC=JP&NR=2021147645A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210927&DB=EPODOC&CC=JP&NR=2021147645A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GOTO SOTA</creatorcontrib><creatorcontrib>DOAN THI HUYEN</creatorcontrib><creatorcontrib>HASEGAWA HIROSHI</creatorcontrib><creatorcontrib>KIMURA HIDEYUKI</creatorcontrib><creatorcontrib>UMINO TAKANORI</creatorcontrib><title>HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THE SAME</title><description>To provide a high-strength steel sheet that has a tensile strength of 1180 MPa or more, a uniform elongation of 6% or more, and an impact fracture resistance.SOLUTION: Provided is a high-strength steel sheet that has a component composition which contains, in mass%, C: 0.10 to 0.20%, Si: 0.7 to 1.4%, Mn: 2.3 to 4.0%, P: 0.10% or less, S: 0.03% or less, Al: 0.001 to 2.0%, N: 0.01% or less, O: 0.01% or less, and B: 0.0005 to 0.010%, has the balance of Fe and unavoidable impurities and MSC of 3.0 to 4.2 mass%, has a microstructure containing upper bainite by 70% or more in area fraction, and fresh martensite and retained austenite by 7 to 30% in total area fraction in which the area fraction of the retained austenite is 2% or more, and has a mechanical characteristic in which the uniform elongation is 6% or higher, the tensile strength is 1180 MPa or more, and the impact value at -40°C in the press notched Charpy test is 8 J/cm2 or more.SELECTED DRAWING: None
【課題】１１８０ＭＰａ以上の引張強度、６％以上の一様伸び、衝撃破壊抵抗有する高強度鋼板の提供。【解決手段】質量％で、Ｃ：０．１０〜０．２０％、Ｓｉ：０．７〜１．４％、Ｍｎ：２．３〜４．０％、Ｐ：０．１０％以下、Ｓ：０．０３％以下、Ａｌ：０．００１〜２．０％、Ｎ：０．０１％以下、Ｏ：０．０１％以下、およびＢ：０.０００５〜０．０１０％を含有し、残部Ｆｅおよび不可避的不純物からなり、ＭＳＣが３．０〜４．２質量％である成分組成を有し、面積分率で７０％以上の上部ベイナイト、合計面積分率で７〜３０％のフレッシュマルテンサイトおよび残留オーステナイトとを含み、かつ、前記残留オーステナイトの面積分率が２％以上であるミクロ組織を有し、一様伸びが６％上、引張強度が１１８０ＭＰａ以上、かつプレスノッチシャルピー試験における−４０℃での衝撃値が８Ｊ／ｃｍ2以上である機械的特性を有する、高強度鋼板。【選択図】なし</description><subject>ALLOYS</subject><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</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><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2021</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLD28HT30A0OCXL1cw_xUAgOcXX1UQj2cHUNUXD0c1HwdQ3x8HdRcPMPUggI8ncJdfb0c1cI8XBVCHb0deVhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFeAUYGRoaGJuZmJqaOxkQpAgARpyl1</recordid><startdate>20210927</startdate><enddate>20210927</enddate><creator>GOTO SOTA</creator><creator>DOAN THI HUYEN</creator><creator>HASEGAWA HIROSHI</creator><creator>KIMURA HIDEYUKI</creator><creator>UMINO TAKANORI</creator><scope>EVB</scope></search><sort><creationdate>20210927</creationdate><title>HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THE SAME</title><author>GOTO SOTA ; DOAN THI HUYEN ; HASEGAWA HIROSHI ; KIMURA HIDEYUKI ; UMINO TAKANORI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2021147645A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2021</creationdate><topic>ALLOYS</topic><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</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><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>GOTO SOTA</creatorcontrib><creatorcontrib>DOAN THI HUYEN</creatorcontrib><creatorcontrib>HASEGAWA HIROSHI</creatorcontrib><creatorcontrib>KIMURA HIDEYUKI</creatorcontrib><creatorcontrib>UMINO TAKANORI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GOTO SOTA</au><au>DOAN THI HUYEN</au><au>HASEGAWA HIROSHI</au><au>KIMURA HIDEYUKI</au><au>UMINO TAKANORI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THE SAME</title><date>2021-09-27</date><risdate>2021</risdate><abstract>To provide a high-strength steel sheet that has a tensile strength of 1180 MPa or more, a uniform elongation of 6% or more, and an impact fracture resistance.SOLUTION: Provided is a high-strength steel sheet that has a component composition which contains, in mass%, C: 0.10 to 0.20%, Si: 0.7 to 1.4%, Mn: 2.3 to 4.0%, P: 0.10% or less, S: 0.03% or less, Al: 0.001 to 2.0%, N: 0.01% or less, O: 0.01% or less, and B: 0.0005 to 0.010%, has the balance of Fe and unavoidable impurities and MSC of 3.0 to 4.2 mass%, has a microstructure containing upper bainite by 70% or more in area fraction, and fresh martensite and retained austenite by 7 to 30% in total area fraction in which the area fraction of the retained austenite is 2% or more, and has a mechanical characteristic in which the uniform elongation is 6% or higher, the tensile strength is 1180 MPa or more, and the impact value at -40°C in the press notched Charpy test is 8 J/cm2 or more.SELECTED DRAWING: None
【課題】１１８０ＭＰａ以上の引張強度、６％以上の一様伸び、衝撃破壊抵抗有する高強度鋼板の提供。【解決手段】質量％で、Ｃ：０．１０〜０．２０％、Ｓｉ：０．７〜１．４％、Ｍｎ：２．３〜４．０％、Ｐ：０．１０％以下、Ｓ：０．０３％以下、Ａｌ：０．００１〜２．０％、Ｎ：０．０１％以下、Ｏ：０．０１％以下、およびＢ：０.０００５〜０．０１０％を含有し、残部Ｆｅおよび不可避的不純物からなり、ＭＳＣが３．０〜４．２質量％である成分組成を有し、面積分率で７０％以上の上部ベイナイト、合計面積分率で７〜３０％のフレッシュマルテンサイトおよび残留オーステナイトとを含み、かつ、前記残留オーステナイトの面積分率が２％以上であるミクロ組織を有し、一様伸びが６％上、引張強度が１１８０ＭＰａ以上、かつプレスノッチシャルピー試験における−４０℃での衝撃値が８Ｊ／ｃｍ2以上である機械的特性を有する、高強度鋼板。【選択図】なし</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS 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 TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THE SAME |
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