Patents Assigned to Nippon Yakin Kogyo Co., Ltd.
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Patent number: 5672315Abstract: A superplastic dual-phase stainless steel comprises C: not more than 0.05 wt %, Si: not more than 1.5 wt %, Mn: not more than 3.0 wt %, Cr: 17.0-26.0 wt %, Ni: 3.0-10.0 wt %, Mo: 0.1-2.0 wt %, N: 0.08-0.20 wt %, S: not more than 0.002 wt %, B: 0.0005-0.01 wt % and the remainder being Fe and inevitable impurities and has a low deformation resistance and an excellent elongation.Type: GrantFiled: November 3, 1995Date of Patent: September 30, 1997Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Nobuyoshi Okato, Hiroshi Yoshida, Nobuya Koide
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Patent number: 5614149Abstract: Coins, particularly game coins, which are soft and excellent in workability before the coining work and high in hardness and exhibit weak magnetism after the coining work are provided. The stainless steel for coins comprises C: not more than 0.03 wt %, Si: 0.1-1.0 wt %, Mn: 0.1-4 wt %, Ni: 5-15 wt %, Cr: 12-20 wt %, N: not more than 0.03 wt %, O: not more than 50 ppm, and, if necessary, at least one of Cu: 0.5-3.0 wt % and Mo: 0.1-2.0 wt % and austenite stabilization index M value of 20.0-23.0 and ferrite formation ratio F value of not more than 6. A method of producing coins of stainless steel is also provided which comprises subjecting a starting material of such a stainless steel to a cold rolling of 50%, heat-treating at 900.degree.-1100.degree. C. and subjecting to coining work of 15-25%.Type: GrantFiled: March 3, 1995Date of Patent: March 25, 1997Assignees: Nippon Yakin Kogyo Co., Ltd., Asahi Seiko Co., Ltd.Inventors: Hiroshi Abe, Toshihiko Taniuchi, Masaomi Tsuda, Yoshito Fujiwara
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Patent number: 5593646Abstract: A metal carrier and a production method thereof for carrying an exhaust gas cleaning catalyst for automobiles, autobicycles, and industrial equipment. The metal carrier includes a metal honeycomb core body pressed into a metal outer cylinder, and the joined portion of the a flat plate and a corrugated plate forming the metal honeycomb core body includes a solder material coated in spots or stripes at peaks of corrugation of the corrugated plate. The solder material in the joined portion of the flat plate and the corrugated plate has a thickness of less than 100 .mu.m, the positions of the joined portions are different between the surface and backside of the flat plate and corrugated plate, and the joined portions are present through an unjoined area having a length of more than 5% of the length of the metal honeycomb core body from an end face of the metal honeycomb core body at the exhaust gas inlet side.Type: GrantFiled: February 3, 1995Date of Patent: January 14, 1997Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yoshikazu Koshiba, Yasuhide Kuroda, Yukio Aoki, Tsuyoshi Minakata, Masaru Iizuka
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Patent number: 5557847Abstract: A method for producing a metal catalyst carrier for cleaning automobile exhaust gases is disclosed. A core having a honeycomb cross-section is inserted into an outer cylinder having an inner diameter nearly equal to that of the outer diameter of the core, by expanding one end of the outer cylinder, pressing the core into the expanded cylinder and heating the assembly to restore the shape of the expanded end. Alternatively, the core is formed by winding a foil solder around its periphery and then contracting and inserting the core into the outer cylinder.Type: GrantFiled: April 21, 1995Date of Patent: September 24, 1996Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yoshikazu Koshiba, Yukio Aoki, Tsuyoshi Minakata, Michio Inamura, Tomohiro Yasunaga, Fujiya Imoto, Junichi Nakagawa
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Patent number: 5532460Abstract: An electromagnetic cooking container includes a non-magnetic titanium alloy plate having a specific resistivity not less than 80.times.10.sup.-6 .OMEGA..multidot.cm and not more than 200.times.10.sup.-6 .OMEGA..multidot.cm. The titanium alloy plate includes a titanium alloy layer, a plurality of laminated titanium alloy layers, or a plurality of kinds of titanium alloy layers. The titanium alloy plate is formed into the desired shape by a superplastic blow forming method in which the titanium alloy plate is forced on a surface of a mold or die by a gas pressure at a forming temperature not less than 500.degree. C. The container may further include a titanium oxide film formed on an inner cooking surface of the formed titanium alloy plate. Heat generation by electromagnetic induction is enabled and there are no problems of deformation, rust, or weight addition.Type: GrantFiled: February 14, 1995Date of Patent: July 2, 1996Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Nobuyoshi Okato, Tatsuo Katagiri, Kuniaki Osada, Keiji Shirakawa
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Patent number: 5512239Abstract: A ferritic stainless steel comprises C: not more than 0.025 wt %, Si: not more than 0.10 wt %, Mn: not more than 1.0 wt %, Cr: 17.0-25.0 wt %, Ni: not more than 0.50 wt %, Mo: 0.50-2.00 wt %, Al: not more than 0.025 wt %, N: not more than 0.025 wt %, at least one of Nb: 10(C wt %+N wt %)-1.0 wt % and Ti: 10(C wt %+N wt %)-1.0 wt %, and the balance being substantially Fe and inevitable impurities and is effectively used in various heat exchangers.Type: GrantFiled: April 18, 1995Date of Patent: April 30, 1996Assignees: Tokyo Radiator Mfg. Co., Ltd, Nippon Yakin Kogyo Co. Ltd., Nissan Motor Co., Ltd.Inventors: Yoshito Fujiwara, Yutaka Kobayashi, Mituo Kimura, Masatoshi Iio, Tohsaku Takamura
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Patent number: 5480608Abstract: A ferritic stainless steel having excellent oxidation resistance, toughness and hot workability contains 0.001-0.20% of at least one of Ca, Mg and Ba as an amount of [Ca]+[Mg]+1/5[Ba], and La: 0.06-0.5% and Ce: 0.002-0.050% in addition to C, Si, Mn, Ni, Cr, Al, Ti and N as a main component provided that these components satisfy relations of the following equations (1)-(3):[S].ltoreq.[Ca]+[Mg]+1/5[Ba] (1)[La]/[Ce].gtoreq.5 (2)Ti.gtoreq.Type: GrantFiled: December 13, 1994Date of Patent: January 2, 1996Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Masaomi Tsuda, Yoshito Fujiwara, Yuji Ikegami, Masao Sato, Hiroyuki Fujii
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Patent number: 5395599Abstract: A metallic carrier for carrying a catalyst for cleaning exhaust gas and a production method thereof, produced from corrugated plates having a trapezoidal cross section and flat plates, both being resistant to high-temperature oxidation, joined by welding and soldering in the vicinity of the welded portions, which are strongly joined and can be used with no problems of telescoping even under heavy heat cycles and gas pressures.Type: GrantFiled: March 8, 1993Date of Patent: March 7, 1995Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yoshikazu Koshiba, Yukio Aoki
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Patent number: 5325911Abstract: A continuously cast slab of Fe-Ni series alloy comprising 30-50 wt % of Ni or further 0.001-0.03 wt % of B and the balance of Fe is controlled to an eqiaxial crystal ratio of 20% or 30% in accordance with the existence or nonexistence of B content in the continuous casting and, if necessary, subjected to an electromagnetic stirring treatment or the like for controlling the eqiaxial crystal ratio and then heated at a temperature of not lower than 950.degree. C., 1000.degree. C. and 1100.degree. C. to economically produce Fe-Ni series alloys having improved effect for restraining streaks during etching.Type: GrantFiled: April 17, 1991Date of Patent: July 5, 1994Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Masaomi Tsuda, Toshihiko Taniuchi
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Patent number: 5316599Abstract: Ni-Ti intermetallic compounds are produced by subjecting a laminate of Ni foils and Ti foils to a rolling for thickness adjustment and then to a diffusion heat treatment at multistages within a particular temperature range for a particular time.Type: GrantFiled: July 9, 1992Date of Patent: May 31, 1994Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Kazuo Ebato, Masaomi Tsuda, Tsutomu Oomori
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Patent number: 5259443Abstract: This invention relates to a direct production process of a length of continuous thin two-phase stainless steel strip having excellent superplasticity and surface properties by casting molten two-phase stainless steel directly on either a single roller or a pair of rollers, so that the molten metal is quenched, and a small amount of austenite appears in ferrite matrix.Type: GrantFiled: February 24, 1992Date of Patent: November 9, 1993Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Kuniaki Osada, Takeya Tohge, Masato Noda
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Patent number: 5134011Abstract: A ferritic stainless steel, of which the surface is coated with a blade-like aluminum oxide, is disclosed. The ferritic stainless steel can be manufactured by heating a ferritic stainless steel containing aluminum at the surface in a stream of purified air. The aluminum-containing stainless steel possesses improved adhesiveness to catalyst carrier which can be utilized in a honeycomb metal structure for a catalytic converter for automobile exhaust gases or in a catalytic device for purifying combustion gases.Type: GrantFiled: April 16, 1990Date of Patent: July 28, 1992Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Takeshi Kamiya, Noboru Tachino
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Patent number: 5085944Abstract: A rare-earth metal series alloy for storage of hydrogen is represented by a general formula of Rem.sub.1 Ni.sub.w Al.sub.x Fe.sub.y M.sub.z as an atomic ratio (wherein Rem is at least one rare earth element such as Mischmetal, M is at least one of Cu, Nb, Si and Zr, and 2.5<w<5.5, 0<x<2.0, 0<y<2.0, 0<z<2.0 and 4.0.ltoreq.w+x+y+z.ltoreq.6.0). Further, the alloy is coated with a film of at least one of Pd, Cu and Ni having a thickness of 100-1000 .ANG..Type: GrantFiled: July 27, 1990Date of Patent: February 4, 1992Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Kazuo Ebato, Keiji Tamura
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Patent number: 5055145Abstract: This invention concerns a production process of ferrite stainless steel covered with oxide whisker suitable for metal catalyst supports in automobile's exhaust gas converters, which comprises controlling the continued growth of alumina whiskers on ferrite stainless steel by heating ferrite stainless steel having alumina whiskers on the surface to 1000.degree.-1200.degree. C. for about 1 minute to 1 hour in a non-oxidizing atmosphere.Type: GrantFiled: August 15, 1989Date of Patent: October 8, 1991Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yuji Ikegami, Shinichi Sasayama, Noboru Tachino, Takeshi Kamiya
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Patent number: 5017544Abstract: This invention concerns a production process of ferrite stainless steel covered with oxide whisker suitable for metal catalyst supports in automobile's exhaust gas converters, which comprises plating a ferrite stainless steel with aluminum, diffusing the aluminum into the stainless steel by heating in vacuum or in a non-oxidizing gas so that the surface of the ferrite stainless steel turns into an aluminum-enriched ferrite phase, and allowing oxide whisker to grow there by heating in the air.Type: GrantFiled: November 29, 1988Date of Patent: May 21, 1991Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yuji Ikegami, Shinichi Sasayama, Noboru Tachino, Takeshi Kamiya
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Patent number: 5002923Abstract: Disclosed is a catalyst support for catalytic reactors for cleaning exhaust gas, characterized in that flat steel band plates and corrugated steel band plates, each of which is heat-resistance and covered with catalyst, are superposed in such a way that one comes on top of the other alternately, and brazed together on their center line running along the longitudinal direction thereof.Type: GrantFiled: July 21, 1989Date of Patent: March 26, 1991Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yoshikazu Koshiba, Takeshi Kamiya, Yuji Ikegami, Noboru Tachino
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Patent number: 5002619Abstract: An ingot of Fe-Ni series alloy comprising 30-80 wt % of NI or further 0.001-0.03 wt % and B and the balance of Fe is upset at a forging ratio of at least 1/1.2U, hot forged at a total sectional reduction ratio of at least 30% to form a slab, from which fine crystal grains are formed at final heat treating stage, whereby Fe-Ni series alloys for electronic and electromagnetic materials are economically produced without generating streaks at the etching.Type: GrantFiled: September 29, 1989Date of Patent: March 26, 1991Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Masaomi Tsuda, Toshihiko Taniuchi
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Patent number: 4987000Abstract: This invention concerns a mechanical plating process comprising: shaving metal off from a pure metal or alloy block and plating an object to be plated with the shaved off metal by the use of at least a single metal brush, wherein the metal block and the metal brush are in frictional contact with each other, and the object to be plated and the metal brush are concurrently in frictional contact with each other.Type: GrantFiled: December 12, 1988Date of Patent: January 22, 1991Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Yoshikazu Koshiba, Yuji Ikegami, Noboru Tachino, Takeshi Kamiya
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Patent number: 4856313Abstract: Method of controlling a strip crown in a planetary mill line, comprising the steps of rolling a slab by using a shaped feeding roll or rolls before passing between planetary rolls to shape a slab profile in the direction of the width of the slab having a flat or curved central portion, opposite side end thicker than the central portion and side portions thinner than the central portion between the central portion and the opposite side ends and subsequently rolling the slab having such a shaped slab providing a planetary rolled strip having a substantially flat strip crown having a uniform thickness over the width of the strip.Type: GrantFiled: September 16, 1987Date of Patent: August 15, 1989Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Ryozo Mirura, Yoshio Okamoto, Hiroki Takahashi, Souichi Inada
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Patent number: 4808371Abstract: Particularly important properties required for exterior protective members for sheathing heaters are resistance to oxidation, anti-stress corrosion properties and weldability. An austenitic stainless steel for the exterior protective members has been developed from the findings that, firstly, the resistance to oxidation can be remarkably improved by increasing the Cr content together with a combined addition of Al and rare earth metals. Secondly, a small amount of Co addition is effective to enhance alloy ability to withstand stress corrosion cracking in the environment to which sheathing heaters are subjected, and that the weldability of such members can be made superior by maintaining the content of Si and Ti within a specified region.Type: GrantFiled: August 10, 1987Date of Patent: February 28, 1989Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Toshihiko Taniuchi, Rikio Nemoto, Yoshito Fujiwara