13 patents
Utility
Chemical conversion-treated steel sheet and method for producing same, and chemical conversion treatment solution
13 Apr 20
This chemical conversion-treated steel sheet (10) has a chemical conversion treatment coating (12) upon a plating layer (17) of a steel sheet (11).
Masanori Matsuno, Masaya Yamamoto
Filed: 26 Mar 15
Utility
Method for producing TIG welded stainless steel tube, TIG welded stainless steel tube, and TIG welded stainless member
30 Mar 20
The present invention provides a method for producing a TIG-welded stainless steel tube without adding H2 to a shielding gas, while inhibiting generation of a weld defect.
Takefumi Nakako, Tomokazu Nobutoki, Hiroshi Asada
Filed: 1 Jun 17
Utility
Laser-welded shaped steel and method for producing same
30 Mar 20
A laser-welded shape section steel includes a web member and a flange member each made of a steel plate, the steel plate having an equivalent carbon content Ceql of not less than 0.075 and not more than 0.15, the equivalent carbon content Ceql being represented by the following formula: Ceql=C+(Si/50)+(Mn/25)+(P/2)+(Cr/25)+Ti, where a welded part, which is a joint part in which the web member and the flange member are joined, has a hardness of not less than 1.2 times and not more than 4 times as hard as that of the steel plate, and the welded part a protrusion length of not greater than 1 mm.
Toru Ienari, Yasuhiro Sakurada, Hiroshi Asada
Filed: 8 Sep 16
Utility
Metal roofing material, and roofing structure and roofing method using same
23 Mar 20
A body portion 100 of a front substrate 10 includes first side surfaces 105 and second side surfaces 106, each of the second side surfaces 106 being arranged at a position protruding toward the outer side along a width direction 100a than the first side surface 105.
Keiji Izumi, Yuugo Oota, Tomoyuki Nagatsu, Norimasa Miura, Katsunari Norita, Kenichi Okubo, Motonori Kurotaki
Filed: 23 Mar 16
Utility
Device and method for manufacturing welded shaped steel
9 Mar 20
A welded shaped steel manufacturing device includes: a plate conveying device configured to convey a web member and two flange members in a conveyance direction; and a laser welding device configured to laser-weld butt portions of ends of the web member butting against the two flange members for weld-bonding, wherein the plate conveying device includes a web member holding device having surface side rollers arranged at intervals in the conveyance direction in a position not to block laser irradiation from the laser welding device toward welding points, and wherein the web member is held with the surface side rollers over a predetermined range in the conveyance direction, and wherein side ends of the surface side rollers facing the two flange members are positioned along boundaries of areas having spatters dispersed from the welding points in a degree exceeding a predetermined value.
Yasuhiro Sakurada, Tooru Ienari, Hiroshi Asada
Filed: 12 May 16
Utility
Method of Producing Hot-dip Aluminum-based Alloy-coated Steel Sheet
4 Mar 20
Provided is (i) a hot-dip Al-based alloy-coated steel sheet which includes a coated layer having a surface on which fine spangles are stably and sufficiently formed and which has a beautiful surface appearance due to the fine spangles thus formed on the surface of the coated layer, and (ii) a method of producing such a hot-dip Al-based alloy-coated steel sheet.
Shinya Furukawa, Koutarou Ishii, Yasunori Hattori
Filed: 7 Nov 19
Utility
High Al-content vibration-damping ferritic stainless steel material, and production method
24 Feb 20
A ferritic stainless steel material excellent in vibration damping capability has a composition containing, by mass %, from 0.001 to 0.04% of C, from 0.1 to 2.0% of Si, from 0.1 to 1.0% of Mn, from 0.01 to 0.6% of Ni, from 10.5 to 20.0% of Cr, from 0.5 to 5.0% of Al, from 0.001 to 0.03% of N, from 0 to 0.8% of Nb, from 0 to 0.5% of Ti, from 0 to 0.3% of Cu, from 0 to 0.3% of Mo, from 0 to 0.3% of V, from 0 to 0.3% of Zr, from 0 to 0.6% of Co, from 0 to 0.1% of REM, from 0 to 0.1% of Ca, the balance of Fe and unavoidable impurities, and has ferrite single phase matrix with crystal grains of average crystal grain diameter of from 0.3 to 3.0 mm and a residual magnetic flux density of 45 mT or less.
Yoshiaki Hori, Kazunari Imakawa, Satoshi Suzuki
Filed: 9 Aug 16
Utility
Annular weir
17 Feb 20
An annular weir is fixed at a bottom of a tundish and just under a long nozzle of a ladle in a continuous casting apparatus.
Yutaka Hiraga
Filed: 23 Jan 18
Utility
Metal roofing material
30 Dec 19
A metal roofing material according to the present invention comprises: a front substrate 2 having a body portion 20, the body portion 20 being comprised of a metal sheet and being formed into a box shape; a back substrate disposed on a back side of the front substrate 2 so as to cover an opening of the body portion 20; a core material filled between the body portion 20 and the back substrate, the metal roofing material being arranged side by side on a roof base together with other metal roofing materials, wherein at least one edge indicator 22 in the form of protrusion is provided at an edge portion of a top plate 20a of the body portion 20.
Keiji Izumi, Yuugo Oota, Tomoyuki Nagatsu
Filed: 2 Oct 16
Utility
Method manufacturing for decorative construction plate
16 Dec 19
The present invention provides a method for manufacturing a decorative construction plate, the method including subjecting a metal siding material including: a metallic substrate on which a recess-projection pattern having a height difference of 0.5 mm or more is formed and on which an ink receiving layer formed from a resin composition is provided; a core material; and a back-side material, to flame treatment by exposing the metal siding material to flame with an output of 250 kJ/h to 12000 kJ/h per 10-mm width of a flame port of a burner so that the surface temperature of the substrate does not exceed 300° C., followed by performing inkjet printing using an active ray curable ink.
Masaki Satou, Seiju Suzuki, Masaru Hiraku, Shuichi Sugita
Filed: 27 Dec 15
Utility
Molded material production method and molded material
9 Dec 19
Provided is a method for producing a molded material by molding processes including at least one drawing-out process and at least one drawing process performed after the drawing-out process, in which a width of a punch 31 used in the drawing-out process on a rear end side is wider than a width of the punch on a distal end side, and an ironing process is performed on a region corresponding to a flange of a base metal sheet 2 by pushing the base metal sheet together with the punch 31 into a pushing hole 30a, and the drawing process is carried out using a die and a drawing sleeve, and processing is performed on a region subjected to the ironing process in the drawing-out process, while maintaining a constant mold gap between the die and the drawing sleeve.
Naofumi Nakamura, Yudai Yamamoto
Filed: 20 Feb 17
Utility
Continuous Casting Method
4 Dec 19
A continuous casting method includes discharging a molten steel from discharge ports of a submerged nozzle under conditions (A) and (B); and performing electro-magnetic stirrer (EMS) to cause flows in directions inverse to each other in the long edge direction on both long edge sides in the molten steel in a region having a depth providing a thickness of a solidification shell of from 5 to 10 mm at least at a center position in the long edge direction. (A) a discharge extended line from the discharge port of the submerged nozzle intersects a molten steel surface m the mold at a point P, and the position of the point P satisfies 0.15≤M/W≤0.45; and (B) condition satisfying 0≤L−0.17 Vi≤350, wherein the unit for L is mm, and Vi represents a discharge velocity (mm/s) of the molten steel at the outlet opening.
Yasuhiro EHARA, Shun SAITO, Kazunari MORITA, Hiroshi MORIKAWA
Filed: 15 Sep 16
Utility
Method of Manufacturing Molded Material, and Said Molded Material
6 Nov 19
The present invention provides a method for manufacturing a molded member by carrying out a multi-stage drawing process and at least one finishing ironing process on a base metal sheet, the molded member comprising: a tubular body; and a flange formed at an end portion of the body, wherein the multi-stage drawing process comprises: a preliminary drawing process for forming a preliminary body having a body element from the base metal sheet; and a plurality of compression drawing processes performed after the preliminary drawing process, the compression drawing processes drawing the body element while applying compressive force along a depth direction of the body element to a circumferential wall of the body element; and wherein the at least one finishing ironing process is carried out such that a mold clearance of an upper portion of the body element is narrower than a mold clearance of a lower portion of the body element.
Naofumi Nakamura, Yudai Yamamoto
Filed: 19 Jun 17
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