摘要:
The invention concerns a cold-rolled aluminum killed steel sheet, which includes by weight between 0.003 and 0.130% of carbon, between 0.10 and 1% of manganese, between 0.010 and 0.100% of aluminum, between 0.0015 and 0.0140% nitrogen, the remainder being of iron and impurities resulting from the manufacturing, and which has a content of carbon in solid solution (Css) of at least 50 ppm, as well as a method of manufacturing packaging from said sheet.
摘要:
A steel sheet has a microstructure that contains ferrite in an area ratio of 20% or more, martensite in an area ratio of 5% or more, and tempered martensite in an area ratio of 5% or more. The ferrite has a mean grain size of 20.0 μm or less. An inverse intensity ratio of γ-fiber to α-fiber in the ferrite is 1.00 or more and an inverse intensity ratio of γ-fiber to α-fiber in the martensite and the tempered martensite is 1.00 or more.
摘要:
A high-strength high-ductility steel sheet has a specific component composition and a steel microstructure containing, in terms of an area ratio relative to the entire microstructure, 8% or more of a retained austenite, with the remainder being at least one of bainite, martensite, tempered bainite, and tempered martensite. With respect to the carbon concentration in the retained austenite, an average carbon concentration is from 0.9 to 1.2 mass %, a standard deviation of the carbon concentration distribution is 0.35 mass % or more, and an area ratio of a region having the carbon concentration of 1.5 mass % or more, relative to the entire microstructure, is 1.0% or more.
摘要:
A steel sheet for deep drawing used for automobiles, and a method for manufacturing the same are disclosed. The steel sheet comprises, by weight %, C: 0.010% or less, Si: 0.02% or less, Mn: 0.06˜1.5%, P: 0.15% or less, S: 0.020% or less, Sol. Al: 0.10˜0.40%, N: 0.010% or less, Ti: 0.003˜0.010%, Nb: 0.003˜0.040%, B: 0.0002˜0.0020%, and the balance of Fe and other unavoidable impurities, wherein the composition of Ti, Al, B, and N satisfies the relationship: 1.0
摘要:
The invention concerns a cold-rolled aluminum killed steel sheet, which includes by weight between 0.003 and 0.130% of carbon, between 0.10 and 1% of manganese, between 0.010 and 0.100% of aluminum, between 0.0015 and 0.0140% nitrogen, the remainder being of iron and impurities resulting from the manufacturing, and which has a content of carbon in solid solution (Css) of at least 50 ppm, as well as a method of manufacturing packaging from said sheet.
摘要:
The present invention provides a TWIP steel sheet that has an austenite matrix structure and includes 15-25 wt % of manganese. The TWIP steel sheet has a recrystallization texture in which brass orientation is suppressed and {3 5 2} is developed as its main orientation during heat treatment subsequent to cold rolling, and has an average plastic strain ratio of 1.2 or more, preferably 1.5 or more. Since this TWIP steel sheet has high workability and strength, complicated vehicle body components can be easily manufactured through a press molding process without cracking or rupturing.
摘要:
Disclosed herein is an ultra high strength TWIP steel sheet having an austenite matrix texture, comprising 0.15˜0.30 wt % of carbon, 0.01˜0.03 wt % of silicon, 15˜25 wt % of manganese, 1.2˜3.0 wt % of aluminum, 0.020 wt % or less of phosphorus, 0.001˜0.002 wt % of sulfur, and residual iron and other inevitable impurities, wherein the TWIP steel sheet is cold-rolled at a reduction ratio of 35˜40% per pass under a condition of 180˜220 Mpa in front and rear tension, and thus has an average plastic strain ratio of 1.2 or more. The ultra high strength TWIP steel sheet has an improved average plastic strain ratio and excellent formability because it has a developed Goss orientation.