Presence Of A Component Of Steel Patents (Class 436/78)
  • Patent number: 8865471
    Abstract: 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.
    Type: Grant
    Filed: December 25, 2008
    Date of Patent: October 21, 2014
    Assignee: JFE Steel Corporation
    Inventors: Satoshi Kinoshiro, Tomoharu Ishida
  • Publication number: 20120288946
    Abstract: A method for efficient, industrialisable detection of machining burns of VHS steel. Machined steel is immersed in an aqueous solution of acids including hydrofluoric acid and nitric acid. To define a burn degree, a color chart for calibrating machining burns of VHS steel detected using the method is prepared. The color chart can include studs of the examined steel subjected to deliberate damage by excessive resurfacing actions (or other machining modes), then submerged in the acid solution. The resurfacing actions can be simulated by overheated thermal treatment, between an ageing temperature (for example 510° C. for steel) and a solution annealing temperature (950° C. for the steel). The samples are classified according to the grey level thereof resulting from the immersion and corresponding to a predetermined hardness and thus to a predetermined level of damage.
    Type: Application
    Filed: January 28, 2011
    Publication date: November 15, 2012
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Fabrice Aberne, Laurent Huet, Olivier Meneses
  • Patent number: 8298827
    Abstract: 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.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: October 30, 2012
    Assignee: JFE Steel Corporation
    Inventors: Tomoharu Ishida, Satoshi Kinoshiro, Katsumi Yamada, Hisato Noro, Kaoru Sato
  • Patent number: 6432718
    Abstract: In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by dissolving the surface and extracting and filtering the inclusions to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: August 13, 2002
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Tokio Suzuki, Koichi Chiba, Ryuji Uemori, Takehiko Toh, Hiroyuki Kondo, Katsuhiro Fuchigami, Eiichi Takeuchi, Masamitsu Wakoh, Akihiro Ono
  • Patent number: 6329206
    Abstract: The concentration of a hexamethylenetetramine-containing inhibitor in an acid pickling solution that has accumulated dissolved iron from use of the solution in pickling ferriferous material can be estimated with sufficient accuracy for practical control of the pickling process by alkalinizing a sample of the pickling solution to a pH of at least 10.8, so that any iron content of the solution precipitates from the solution, separating the precipitate from the liquid remainder of the alkalinized sample, and determining by colorimetry the concentration in the liquid remainder of formaldehyde produced by acid catalyzed hydrolysis of the hexamethylenetetramine to formaldehyde and ammonia.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: December 11, 2001
    Assignee: Henkel Corporation
    Inventor: James P. Bershas
  • Patent number: 5985674
    Abstract: In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by a fluorescent X-ray analysis method using an energy dispersion type spectroscope, or by other chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 16, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Tokio Suzuki, Koichi Chiba, Ryuji Uemori, Takehiko Toh, Hiroyuki Kondo, Katsuhiro Fuchigami, Eiichi Takeuchi, Masamitsu Wakoh, Akihiro Ono
  • Patent number: 5985356
    Abstract: Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: November 16, 1999
    Assignees: The Regents of the University of California, Symyx Technologies
    Inventors: Peter G. Schultz, Xiaodong Xiang, Isy Goldwasser
  • Patent number: 5186894
    Abstract: A dry analysis element for the analysis of iron ions, which is improved in selectivity so that iron ions can be analyzed reliably at a high sensitivity without the interferences by the presence of hindering Cu.sup.2+ and/or Zn.sup.2+ ions. The analysis element comprises a detection reagent layer containing Nitro-PAPS acting as a chelating agent and a cationic compound, and a pre-treating layer containing a Cu.sup.2+ -specific chelating agent. The analysis element further includes a pH buffer for keeping the pH value of the detection reagent layer within the range of from pH 3.0 to 5.0. The pH adjusting buffer may be contained in either one of the detection reagent layer or the pre-treating layer, or may be contained in another layer. The detection reagent layer may be composed of a coloring reagent layer containing Nitro-PAPS acting as the chelating agent, and a diffusion-preventing layer laminated on the coloring reagent layer and containing the cationic compound.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: February 16, 1993
    Assignee: Fuji Photo Film Co, Ltd.
    Inventor: Harumi Katsuyama
  • Patent number: 5030577
    Abstract: A system for in-line alloying of a molten metal stream comprises: means for controlling mass flow rate of the stream; means for adding alloying material to the stream at an adjustable rate; means for determining chemical composition of the stream downstream from the material adding means, preferably at timed intervals; and means for adjusting the rate at which alloying material is added to the stream based on mass flow rate and the extent to which the determined stream composition differs from a desired composition. A method for conducting in-line alloying and analysis of a continuous metal stream is also disclosed.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: July 9, 1991
    Assignee: Aluminum Company of America
    Inventors: John L. Genna, Jeffrey B. Moreland, C. Edward Eckert, Ronald E. Miller
  • Patent number: 4871513
    Abstract: An aqueous solution containing 0.00005 to 0.2 mol/l of copper ion and 0.0001 to 1.0 mol/l of nitrate ion is effective to detect phosphorus segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying the aqueous solution to the paper, maintaining the paper in contact with the steel surface until stains appear, and removing the paper from the steel surface. A red print is obtained when the solution is pH 6 or higher. A blue print is obtained by following the above steps, and further treating the paper with a color reagent containing molybdate ion, and then with a reducing agent.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: October 3, 1989
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4718992
    Abstract: An aqueous electrolytic solution of a molybdate ion and an oxidizing agent is effective to detect phosphorus segregates in a metallic material, particularly cast steel through electrolysis. Segregated phosphorus can be detected by (a) applying a test sheet against a surface area of the metallic material to be examined for segregation, (b) introducing an aqueous electrolytic solution comprising 0.1 to 20% by weight of a molybdate ion and an oxidizing agent between the metallic material surface area and the sheet, (c) contacting a cathode plate with the sheet, (d) effecting electrolysis with the metallic material made anode, (e) removing the sheet from the metallic material surface, and (f) treating the sheet with a reducing agent.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: January 12, 1988
    Assignees: Kawasaki Steel Corporation, Kawasaki Steel Techno-Research Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4696906
    Abstract: An aqueous solution of 0.1-80% silver nitrate is effective to detect phosphrous segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying an aqueous solution of 0.1 to 80% by weight of silver nitrate to the paper, maintaining the paper in contact with the steel surface for a sufficient time, removing the paper from the steel surface, and subjecting the paper to fixing treatment. The solution may further comprise an amount of lower alkyl alcohol that is compatible with the silver nitrate in solution.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: September 29, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4681857
    Abstract: An aqueous solution containing 0.00005 to 0.2 mol/l of copper ion and 0.0001 to 1.0 mol/l of nitrate ion is effective to detect phosphorus segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying the aqueous solution to the paper, maintaining the paper in contact with the steel surface until stains appear, and removing the paper from the steel surface. A red print is obtained when the solution is pH 6 or higher. A blue print is obtained by following the above steps, and further treating the paper with a color reagent containing molybdate ion, and then with a reducing agent.
    Type: Grant
    Filed: August 13, 1985
    Date of Patent: July 21, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4643979
    Abstract: Phosphorus segregates formed in cast steel upon solidifying are detected by a novel method comprising applying a metal etching reagent, for example, lithium chloride in ethanol, to a surface area of the steel to be examined, and attaching a sheet of test paper bearing an aqueous solution of silver nitrate to said surface, thereby detecting phosphorus segregates as stains on the sheet.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: February 17, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshiko Funahashi, Yasuharu Matsumura, Senichi Harimaya, Yoshikazu Kamino, Hidenari Kitaoka
  • Patent number: 4643978
    Abstract: An aqueous solution of silver nitrate is effective to detect phosphorus segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying an aqueous solution of 0.1 to 80% by weight of silver nitrate to the paper, maintaining the paper in contact with the steel surface for a sufficient time, removing the paper from the steel surface, and subjecting the paper to fixing treatment.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: February 17, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4533642
    Abstract: Wet chemical, microcomputer-controlled procedure for the rapid dissolution of metal followed by accurate determination of elements in the sample and, more specifically, suited to meet steel industry requirements for control of the level of acid-soluble aluminum in steel during the making of steel, is described. A sample of steel to be tested is normally placed in an electrolytic cell wherein a known portion of the sample is dissolved electrolytically in dilute cold acid. The aluminum content of the resulting solution is determined spectrophotometrically. The apparatus is compact and readily installed near the steelmaking operation.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: August 6, 1985
    Assignee: Stelco Inc.
    Inventor: John H. Kelly