Patent application number | Description | Published |
20100196189 | HIGH-STRENGTH STEEL SHEET - A high-strength steel sheet has high stretch flangeability after working and corrosion resistance after painting. The steel sheet contains, on the basis of mass percent, C: 0.02% to 0.20%, Si: 0.3% or less, Mn: 0.5% to 2.5%, P: 0.06% or less, S: 0.01% or less, Al: 0.1% or less, Ti: 0.05% to 0.25%, and V: 0.05% to 0.25%, the remainder being Fe and incidental impurities. The steel sheet has a substantially ferritic single phase, the ferritic single phase containing precipitates having a size of less than 20 nm, the precipitates containing 200 to 1750 mass ppm Ti and 150 to 1750 mass ppm V, V dissolved in solid solution being 200 or more but less than 1750 mass ppm. | 08-05-2010 |
20100206736 | METHOD FOR ANALYZING METALLIC MATERIAL - A method for analyzing a metallic material includes the steps of electrolyzing a metal sample in an electrolyte; removing the electrolyzed metal sample from the electrolyte; immersing the metal sample removed from the electrolyte into a dispersive solution that is different from the electrolyte to separate at least one selected from the group consisting of a precipitate and an inclusion deposited on the metal sample; and analyzing the at least one selected from the group consisting of a precipitate and an inclusion extracted into the dispersive solution. | 08-19-2010 |
20110240477 | METHOD FOR ANALYZING METAL MATERIAL - A method for analyzing a metal material includes electrolyzing a metal sample in an electrolytic solution, immersing a remaining portion of the metal sample taken out of the electrolytic solution in a dispersible solution to separate at least one substance selected from the group consisting of precipitates and inclusions attached to the remaining portion of the metal sample, filtering the dispersible solution containing the at least one separated substance through filters having straight pores and a porosity of 4% or more to obtain residues trapped on the filters and filtrates, and analyzing at least one of the residues and the filtrates. | 10-06-2011 |
20120107633 | HIGH STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities. | 05-03-2012 |
20130196445 | METHOD AND DEVICE FOR ANALYZING SULFUR IN METAL SAMPLE - An analyzing method which enables highly precise and rapid quantitative analysis of sulfur contained in a metal sample, includes: combusting a metal sample containing a sulfur component under pure oxygen gas atmosphere to oxidize the sulfur component into sulfur dioxide; and quantitatively analyzing sulfur in the metal sample through analysis, according to a UV fluorescence method, of a sulfur dioxide containing gas containing the sulfur dioxide generated by combustion of the metal sample. | 08-01-2013 |