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公开(公告)号：US20170253957A1
公开(公告)日：2017-09-07
申请号：US15506911
申请日：2015-07-02
发明人： Burkhard KAUP , Blaise MASSICOT , Dirk MATUSCH
IPC分类号： C23C8/26 , C23F17/00 , C21D9/48 , C22C38/00 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , C23C8/80 , C21D8/04
CPC分类号： C23C8/26 , C21D8/02 , C21D8/0205 , C21D8/0236 , C21D8/0257 , C21D8/04 , C21D8/0405 , C21D8/0436 , C21D8/0457 , C21D8/0473 , C21D9/48 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C23C8/80 , C23F17/00
摘要： A nitrided packaging steel in the form of a flat steel product and method for producing a nitrided packaging steel with a carbon content of 10-1000 ppm and uncombined nitrogen, dissolved in the steel, of more than 100 ppm. The nitriding is performed in two stages: a first stage, in which a molten steel is nitrided to a nitrogen content of at most 160 ppm by introducing a nitrogen-containing gas and/or a nitrogen-containing solid into the molten steel, and a second stage, in which a flat steel product produced from the nitrided molten steel by cold rolling is treated with a nitrogen-containing gas in order to increase further the amount of uncombined nitrogen in the flat steel product. The second stage is performed in an annealing furnace, in which the flat steel product is at the same time annealed in a recrystallizing manner. The packaging steels produced are distinguished by great strength, in excess of 600 MPa, and good elongation to fracture, regularly in excess of 5%, as well as by good forming properties.
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公开(公告)号：US20210277505A1
公开(公告)日：2021-09-09
申请号：US17193477
申请日：2021-03-05
摘要： A packaging sheet metal product from a cold-rolled steel sheet with a thickness of less than 0.6 mm has a specified composition. The packaging sheet metal product during biaxial deformation in a bulge test has a lower yield strength (SbeL) of more than 300 MPa and a corresponding elongation at break (Ab) of more than 10 % and in the plastic region between the Lüders elongation (Abe) and an upper (plastic) elongation limit of εmax=0.5·Ab(SbeL/Sbm) has a biaxial stress/strain diagram σB(ε) that can be represented by a function εmax=b·εn, with: σB is the true biaxial stress in MPa; ε is the amount of true elongation in the thickness direction in %; Sbm is the absolute strength; b is a proportionality factor; and n is a strain-hardening exponent. A strengthening of the packaging sheet product in the thickness direction is characterized by a strain-hardening exponent of n≥0.353−5.1·SbeL/104 MPa.
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公开(公告)号：US20170226609A1
公开(公告)日：2017-08-10
申请号：US15518905
申请日：2015-08-03
发明人： Blaise MASSICOT , Manuel KÖHL , Burkhard KAUP , Reiner SAUER , Ricarda KLEMMER , Chrysanthus KIEWITZ
IPC分类号： C21D9/46 , C21D8/02 , C21D1/76 , C21C7/00 , F27D3/16 , C21D1/42 , C21D1/40 , F27D11/04 , F27D11/06 , C23C8/26 , C21D9/00
CPC分类号： C21D9/46 , C21C7/00 , C21D1/40 , C21D1/42 , C21D1/76 , C21D8/0226 , C21D8/0236 , C21D8/0257 , C21D8/0273 , C21D9/0062 , C22C38/00 , C22C38/001 , C23C8/02 , C23C8/26 , C23C8/80 , F27D3/16 , F27D11/04 , F27D11/06 , F27D2003/166 , Y02P10/253
摘要： A method for producing a nitrided packaging steel from a hot-rolled steel product with a carbon content of 400 to 1200 ppm, utilizing a cold-rolling of the steel product to a flat steel product, subsequent recrystallization annealing of the cold-rolled flat steel product in an annealing furnace, in particular a continuous annealing furnace. A nitrogen-containing gas is supplied into the annealing furnace and is directed at the flat steel product to introduce unbonded nitrogen into the flat steel product in an amount corresponding to a concentration of more than 100 ppm, or to increase the amount of unbonded nitrogen in the flat steel product to a concentration of more than 100 ppm, and subsequent cooling of the recrystallized annealed flat steel product at a cooling rate of at least 100 K/s directly after the recrystallization annealing. Using this method, cold-rolled flat steel products may be produced for packaging purposes with a tensile strength of more than 650 MPa and in particular between 700 and 850 MPa.
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公开(公告)号：US20210277495A1
公开(公告)日：2021-09-09
申请号：US17193096
申请日：2021-03-05
IPC分类号： C21D9/46 , B32B15/01 , C21D8/02 , C21D1/06 , C23C8/26 , C23C8/80 , C23C8/02 , C21D6/00 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
摘要： A cold-rolled flat steel product for packaging materials has a thickness of less than 0.6 mm, which has been cold-rolled from steel along a rolling direction (0°) and which has an excellent isotropy with respect to its mechanical properties.
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