Method for producing high-strength steel with yield strength of 700 MPa based on short process and low cost
The invention discloses a method for producing high-strength steel with yield strength of 700MPa based on short process and low cost, and relates to the technical field of hot-rolled high-strength steel production. The method comprises the following steps: (1) smelting and continuously casting mater...
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| creator | DENG ZHIXUN WANG HONGBING NIE CHANGPING CHAUAIDA LEE SANG-KUK LIU HAO LIANG LIANG SHU CHUNYANG WU HAOHONG |
| description | The invention discloses a method for producing high-strength steel with yield strength of 700MPa based on short process and low cost, and relates to the technical field of hot-rolled high-strength steel production. The method comprises the following steps: (1) smelting and continuously casting materials into a plate blank; (2) heating and descaling a continuous casting sheet billet; (3) finish rolling and water cooling; (4) coiling by a strip steel coiling machine; and (5) the cooled steel coil is subjected to cover annealing. The grain size of the produced high-strength steel with the yield strength of 700 MPa grade is 11-13 grade, the metallographic structure is ferrite and a small amount of low-carbon bainite, the yield strength ReH of a finished product with the thickness of 1.2-8.0 mm is larger than or equal to 700 MPa, the tensile strength Rm is larger than or equal to 785 MPa, the percentage elongation after fracture is larger than or equal to 18%, and a 180-degree cold bending test shows that d = a is |
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The method comprises the following steps: (1) smelting and continuously casting materials into a plate blank; (2) heating and descaling a continuous casting sheet billet; (3) finish rolling and water cooling; (4) coiling by a strip steel coiling machine; and (5) the cooled steel coil is subjected to cover annealing. The grain size of the produced high-strength steel with the yield strength of 700 MPa grade is 11-13 grade, the metallographic structure is ferrite and a small amount of low-carbon bainite, the yield strength ReH of a finished product with the thickness of 1.2-8.0 mm is larger than or equal to 700 MPa, the tensile strength Rm is larger than or equal to 785 MPa, the percentage elongation after fracture is larger than or equal to 18%, and a 180-degree cold bending test shows that d = a is</description><language>chi ; eng</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 ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ; PERFORMING OPERATIONS ; PUNCHING METAL ; ROLLING OF METAL ; TRANSPORTING ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2022</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=20220415&DB=EPODOC&CC=CN&NR=114345938A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220415&DB=EPODOC&CC=CN&NR=114345938A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>DENG ZHIXUN</creatorcontrib><creatorcontrib>WANG HONGBING</creatorcontrib><creatorcontrib>NIE CHANGPING</creatorcontrib><creatorcontrib>CHAUAIDA</creatorcontrib><creatorcontrib>LEE SANG-KUK</creatorcontrib><creatorcontrib>LIU HAO</creatorcontrib><creatorcontrib>LIANG LIANG</creatorcontrib><creatorcontrib>SHU CHUNYANG</creatorcontrib><creatorcontrib>WU HAOHONG</creatorcontrib><title>Method for producing high-strength steel with yield strength of 700 MPa based on short process and low cost</title><description>The invention discloses a method for producing high-strength steel with yield strength of 700MPa based on short process and low cost, and relates to the technical field of hot-rolled high-strength steel production. 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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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Method for producing high-strength steel with yield strength of 700 MPa based on short process and low cost |
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