Patents by Inventor Yoshitaka Nishiyama

Yoshitaka Nishiyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120141318
    Abstract: An austenitic stainless steel, which consists of by mass percent, C: not more than 0.02%, Si: not more than 1.5%, Mn: not more than 2%, Cr: 17 to 25%, Ni: 9 to 13%, Cu: more than 0.26% not more than 4%, N: 0.06 to 0.35%, sol. Al: 0.008 to 0.03%. One or more elements selected from Nb, Ti, V, TA, Hf, and Zr in controlled amounts can be included with the balance being Fe and impurities. P, S, Sn, As, Zn, Pb and Sb among the impurities are controlled as P: 0.006 to 0.04%, S: 0.0004 to 0.03%, Sn: 0.001 to 0.1%, As: not more than 0.01%, Zn: not more than 0.01%, Pb: not more than 0.01% and Sb: not more than 0.01%. The amounts of S, P, Sn, As, Zn, Pb and Sb and the amounts of Nb, Ta, Zr, Hf, and Ti are further controlled using formulas.
    Type: Application
    Filed: February 8, 2012
    Publication date: June 7, 2012
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Takahiro OSUKI, Kazuhiro OGAWA, Hiroyuki HIRATA, Yoshitaka NISHIYAMA
  • Patent number: 8133431
    Abstract: An austenitic stainless steel, which comprises by mass %, C<0.04%, Si?1.5%, Mn?2%, Cr: 15 to 25%, Ni: 6 to 30%, N: 0.02 to 0.35%, sol. Al?0.03% and further contains one or more elements selected from Nb?0.5%, Ti?0.4%, V?0.4%, Ta?0.2%, Hf?0.2% and Zr?0.2%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfy the conditions F1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.0075 and 0.05?F2=Nb+Ta+Zr+Hf+2Ti+(V/10)?1.7?9×F1 has not only excellent liquation cracking resistance in the HAZ on the occasion of welding and excellent embrittling cracking resistance in the HAZ during a long period of use at high temperatures but also excellent polythionic acid SCC resistance and high temperature strength.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: March 13, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Takahiro Osuki, Kazuhiro Ogawa, Hiroyuki Hirata, Yoshitaka Nishiyama
  • Publication number: 20110308669
    Abstract: In this method, the inner surface of a metal pipe containing, by mass percent, 20 to 55% of Cr and 20 to 70% of Ni is subjected to mechanical treatment, the metal pipe is subjected to heat treatment such as to be held in a temperature range of 1050 to 1270° C. for 0.5 to 60 minutes, and thereby an oxide scale layer consisting mainly of Cr is formed on at least the inner surface of the metal pipe. A metal pipe excellent in carburization resistance and coking resistance in a carburizing gas environment can be obtained by the method.
    Type: Application
    Filed: August 11, 2011
    Publication date: December 22, 2011
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yoshitaka NISHIYAMA, Masaki UEYAMA, Masatoshi TOYODA
  • Publication number: 20110257832
    Abstract: Disclosed is a fuel-saving driving evaluation system which provides a driver with advice suitable for the driver based on fuel-saving driving evaluation standards which correspond to the fuel-saving driving proficiency level of the driver, so that the driver is relaxed and the fuel-saving driving skill of the driver is gradually improved. The fuel-saving driving evaluation system is comprised of an engine speed measuring device (1) for measuring the engine speed of a vehicle (10) to be evaluated, a vehicle speed measuring device (2) for measuring the speed of the vehicle (10) to be evaluated, a fuel flow measuring device (3) for measuring the flow rate of a fuel, and a control device (9).
    Type: Application
    Filed: December 14, 2009
    Publication date: October 20, 2011
    Inventors: Takahiro Ishida, Yoshitaka Nishiyama
  • Publication number: 20110238278
    Abstract: The present invention has an object to provide a fuel-saving driving system which gradually decreases a target vehicle speed from start of control to passage of a descending-slope starting point in a linear form and can obtain fuel-saving and smooth driving feeling without repeating fuel-cut and injection. The present invention has a vehicle-position specifying device (2) for specifying the position of a vehicle, a storage device (11) for storing data of a descending slope located in the vehicle traveling direction, a vehicle speed measuring device (3) for measuring a speed (Va) of the vehicle (1), and a controller (10), the controller (10) has a function of determining (calculating) a target speed (requested speed Vd) of the vehicle (1) from the vehicle speed (Va) and the data of the descending slope.
    Type: Application
    Filed: December 2, 2009
    Publication date: September 29, 2011
    Applicant: UD Trucks Corporation
    Inventors: Yoshitaka Nishiyama, Tomoki Kubo
  • Publication number: 20100054983
    Abstract: An austenitic stainless steel, which comprises by mass %, C<0.04%, Si?1.5%, Mn?2%, Cr: 15 to 25%, Ni: 6 to 30%, N: 0.02 to 0.35%, sol. Al?0.03% and further contains one or more elements selected from Nb?0.5%, Ti?0.4%, V?0.4%, Ta?0.2%, Hf?0.2% and Zr?0.2%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfy the conditions F1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.0075 and 0.05?F2=Nb+Ta+Zr+Hf+2Ti+(V/10)?1.7?9×F1 has not only excellent liquation cracking resistance in the HAZ on the occasion of welding and excellent embrittling cracking resistance in the HAZ during a long period of use at high temperatures but also excellent polythionic acid SCC resistance and high temperature strength.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Inventors: Takahiro OSUKI, Kazuhiro OGAWA, Hiroyuki HIRATA, Yoshitaka NISHIYAMA
  • Publication number: 20100034690
    Abstract: There is provided a metal material having excellent workability and metal dusting resistance, which is suitable as a raw material for cracking furnaces, reforming furnaces, heating furnaces, heat exchangers, etc. in petroleum refining, petrochemical plants, and the like. The metal material is characterized by consisting of, by mass %, C: 0.08 to 0.4%, Si: 0.6 to 2.0%, Mn: 0.05 to 2.5%, P: 0.04% or less, S: 0.015% or less, Cr: 18 to 30%, Ni: 20% or higher and less than 30%, Cu: 0.5 to 10.0%, Al: 0.01 to 1%, Ti: 0.01 to 1%, N: 0.15% or less, and O (oxygen): 0.02% or less, the balance being Fe and impurities, and satisfying Expression (1). C?0.062×Si+0.033×Cu?0.004×Cr+0.043??(1) in which the symbol of element in Expression (1) represents the content of that element in mass %.
    Type: Application
    Filed: August 11, 2009
    Publication date: February 11, 2010
    Inventors: Yoshitaka Nishiyama, Takahiro Osuki, Satoshi Matsumoto
  • Patent number: 7454962
    Abstract: The present invention is intended to provide a fuel consumption evaluation system which obtains quantitative data to determine whether actual driving has consumed fuel more efficiently or less efficiently than average driving and gives the driver and/or manager concrete advice for fuel-efficient driving based on the obtained data, and also provide a fuel consumption evaluation system which decides, based on obtained fuel efficiency data, whether driving is more fuel-efficient than average driving and sets a target and gives the driver and/or manager concrete advice for fuel-efficient driving based on the obtained data in consideration of change in vehicle total mass without any influence of slopes and traffic flows and particularly encourages and instructs, in real time, the driver to do fuel-efficient driving.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: November 25, 2008
    Assignee: Nissan Diesel Motor Co., Ltd.
    Inventors: Yoshitaka Nishiyama, Masaru Yamashita, Hiroshi Miyake, Akira Nakamura
  • Publication number: 20080279716
    Abstract: [Objective] To provide a metal material having excellent metal dusting resistance which is suited for using cracking furnaces, reforming furnaces, heating furnaces or heat exchangers, in petroleum refining, petrochemical plants, etc. [Means for Solution] A metal material having excellent metal dusting resistance, characterized in comprising, by mass %, C: 0.01 to 0.4%, Si: 0.01 to 2.5%, Mn: 0.01 to 2.5%, Cr: 15 to 35%, Ni: 20 to 65%, Cu: 0.05 to 20%, S: not more than 0.1%, N: not more than 0.25% and O (oxygen): not more than 0.02% and the balance Fe and impurities, and also containing, by mass %, one or more selected among the elements of P: more than 0.05% and not more than 0.3%, Sb: 0.001 to 1% and Bi: 0.001 to 0.5. It may further contain one or more selected among the elements of Nd: 0.001 to 0.15%, Co: not more than 10%, Mo: not more than 3%, W: not more than 6%, Ti: not more than 1%, Nb: not more than 2%, B: not more than 0.1%, Zr: not more than 1.2%, Hf: not more than 0.5%, Mg: not more than 0.
    Type: Application
    Filed: July 10, 2008
    Publication date: November 13, 2008
    Inventors: Yoshitaka Nishiyama, Nobuo Otsuka
  • Patent number: 7396597
    Abstract: A stainless steel pipe includes a base metal containing 20-35 mass % of Cr, and a Cr-depleted zone is formed in the surface region of the pipe. The Cr concentration in the Cr-depleted zone is at least 10%, and the thickness of the Cr-depleted zone is at most 20 micrometers. A Cr-based oxide scale layer having a Cr content of at least 50% and a thickness of 0.1-15 micrometers may be provided on the outer side of the Cr-depleted zone. An Si-based oxide scale layer with an Si content of at least 50% may be provided between the Cr-based oxide scale layer and the Cr-depleted zone. The pipe is particularly suitable for use in petroleum refineries or petrochemical plants, such as for use as a pipe of a cracking furnace of an ethylene plant.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: July 8, 2008
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yoshitaka Nishiyama, Yoshimi Yamadera
  • Publication number: 20080107559
    Abstract: An austenitic stainless steel having excellent resistance to scale peeling which can suppress peeling of a protective oxide scale which is formed on the steel surface even when the steel undergoes repeated cycles of high temperature heating and cooling and which is suitable for use in a high temperature, humidified gas environment at a high temperature and particularly at 1023 K or above has a steel composition consisting essentially of C: 0.01-0.15%, Si: 0.01-3%, Mn: 0.01-2%, Cu: 0.1-2.5%, Cr: 23-30%, Ni: 16-25%, Al: 0.005-0.20%, N: 0.001-0.40%, P: at most 0.04%, S: at most 0.01%, at least one of Y and Ln series elements: a total of 0.005-0.1%, and a balance of Fe and unavoidable impurities, with the number of inclusions containing Y and Ln series elements in the steel surface being at most 5×10?3/?m2.
    Type: Application
    Filed: October 10, 2007
    Publication date: May 8, 2008
    Inventors: Yoshitaka Nishiyama, Nobuo Otsuka
  • Publication number: 20070256481
    Abstract: The present invention is intended to provide a fuel consumption evaluation system which obtains quantitative data to determine whether actual driving has consumed fuel more efficiently or less efficiently than average driving and gives the driver and/or manager concrete advice for fuel-efficient driving based on the obtained data, and also provide a fuel consumption evaluation system which decides, based on obtained fuel efficiency data, whether driving is more fuel-efficient than average driving and sets a target and gives the driver and/or manager concrete advice for fuel-efficient driving based on the obtained data in consideration of change in vehicle total mass without any influence of slopes and traffic flows and particularly encourages and instructs, in real time, the driver to do fuel-efficient driving.
    Type: Application
    Filed: July 15, 2005
    Publication date: November 8, 2007
    Applicant: Nissan Diesel Motor Co., Ltd
    Inventors: Yoshitaka Nishiyama, Masaru Yamashita, Hiroshi Miyake, Akria Nakamura
  • Publication number: 20070187379
    Abstract: The invention is directed to a weld joint comprising both a base material and a weld metal both having a chemical composition including C: 0.01-0.45%, Si: more than 1%, 4% or less, Mn: 0.01-2%, P: 0.05% or less, S: 0.01% or less, Cr: 15-35%, Ni: 40-78%, Al: 0.005-2%, N: 0.001-0.2% and Cu: 0.015-5.5% in mass percent, further including Ti satisfying the following formula (1), and the balance being Fe and impurities. Both the material and the weld metal may further include one or more kinds of Co, Mo, Ta, W, V, Zr, Nb, Hf, B, Ca, Mg, and REM. {(Si-0.01)/30}+0.01Cu?Ti?5??(1) wherein a symbol of an element in formula (1) means a content of the element (mass percent).
    Type: Application
    Filed: January 31, 2007
    Publication date: August 16, 2007
    Inventors: Takahiro Osuki, Kazuhiro Ogawa, Yoshitaka Nishiyama
  • Publication number: 20050045251
    Abstract: A stainless steel pipe includes a base metal containing 20-35 mass % of Cr, and a Cr-depleted zone is formed in the surface region of the pipe. The Cr concentration in the Cr-depleted zone is at least 10%, and the thickness of the Cr-depleted zone is at most 20 micrometers. A Cr-based oxide scale layer having a Cr content of at least 50% and a thickness of 0.1-15 micrometers may be provided on the outer side of the Cr-depleted zone. An Si-based oxide scale layer with an Si content of at least 50% may be provided between the Cr-based oxide scale layer and the Cr-depleted zone. The pipe is particularly suitable for use in petroleum refineries or petrochemical plants, such as for use as a pipe of a cracking furnace of an ethylene plant.
    Type: Application
    Filed: July 16, 2004
    Publication date: March 3, 2005
    Inventors: Yoshitaka Nishiyama, Yoshimi Yamadera
  • Patent number: 6702906
    Abstract: A Ni-base heat resistant alloy excellent in weldability and strength at elevated temperatures and suited for use in manufacturing cracking furnace tubes and reformer furnace tubes to be used in ethylene plants as well as a welded joint therefor is provided. The alloy of the invention is a Ni-base heat-resistant alloy, which comprises C: not more than 0.1%, Si: not more than 2%, Mn: not more than 2%, P: not more than 0.025%, S: not more than 0.005%, N: not more than 0.04%, Cr: 10 to 30%, Al: 2.1 to less than 4.5%, and Mo: 2.5 to 15% or W: 2.5 to 9% or Mo and W: 2.5 to 15% in total, and satisfies the relation (1) given below: (104Si+1980P+1980S+9Al+15Ti+11Nb+1.8W+11600B)≦{1.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: March 9, 2004
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Ogawa, Kazuyuki Kitamura, Hirokazu Okada, Yoshitaka Nishiyama
  • Patent number: 6623869
    Abstract: A metallic material of the invention which comprises, in mass %, C: not more than 0.2%, Si: 0.01-4%, Mn: 0.05-2%, P: not more than 0.04%, S: not more than 0.015%, Cr: 10-35%, Ni: 30-78%, Al: not less than 0.005% but less than 4.5%, N: 0.005-0.2%, and one or both of Cu: 0.015-3% and Co: 0.015-3%, with the balance substantially being Fe, and of which the value of 40Si+Ni+5Al+40N+10 (Cu+Co), wherein the symbols of elements represent the contents of the respective elements, is not less than 50 and has excellent corrosion resistance in an environment in which metal dusting is ready to occur and, therefore, can be utilized as or in heating furnace pipes, piping systems, heat exchanger pipes and so forth to be used in a petroleum refinery or in petrochemical plants, and can markedly improve the equipment durability and safety.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: September 23, 2003
    Inventors: Yoshitaka Nishiyama, Nobuo Otsuka
  • Publication number: 20030005981
    Abstract: A Ni-base heat resistant alloy excellent in weldability and strength at elevated temperatures and suited for use in manufacturing cracking furnace tubes and reformer furnace tubes to be used in ethylene plants as well as a welded joint therefor is provided. The alloy of the invention is a Ni-base heat-resistant alloy, which comprises C: not more than 0.1%, Si: not more than 2%, Mn: not more than 2%, P: not more than 0.025%, S: not more than 0.005%, N: not more than 0.04%, Cr: 10 to 30%, Al: 2.1 to less than 4.5%, and Mo: 2.5 to 15% or W: 2.5 to 9% or Mo and W: 2.
    Type: Application
    Filed: July 11, 2002
    Publication date: January 9, 2003
    Inventors: Kazuhiro Ogawa, Kazuyuki Kitamura, Hirokazu Okada, Yoshitaka Nishiyama
  • Patent number: 6458318
    Abstract: A heat resistant Ni base alloy comprises, on a mass% basis, 0.1% or less C, 2% or less Si, 2% or less Mn, 0.005% or less S, 10 to 25% Cr, 2.1 to less than 4.5% Al, 0.08% or less N, 0.001 to 1% in total of one or more elements of B: 0.03% or less, Zr: 0.2% or less and Hf: 0.8% or less, and 2.5 to 15% in total of one or more elements of Mo: 0.01 to 15% and W: 0.01 to 9%. The alloy is suitable as a material for a pipe used in ethylene cracking furnace.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: October 1, 2002
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yoshitaka Nishiyama, Toshiro Anraku, Yoshiatsu Sawaragi, Kazuhiro Ogawa, Hirokazu Okada
  • Patent number: 5944917
    Abstract: A stainless steel having excellent corrosion resistance to ozone added water, such as ozone added ultrapure water used in semiconductor manufacturing processes and the like, as well as a manufacturing method. The stainless steel comprises a base metal and an oxide film formed on the surface of the base metal, the base metal being a stainless steel which contains 12 to 30% of Cr, 0 to 35% of Ni, and 1 to 6% of Al and Si while the contents of the other alloying elements are limited to as low a level as possible, the oxide film mainly comprising Al oxide or a Si oxide or both. The oxide film may be formed on the base metal surface through the dry oxidation process or the wet oxidation process. In the stainless steel, metallic ions are rarely dissolved from the base metal into the ozone added water.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: August 31, 1999
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kiyoko Takeda, Shigeki Azuma, Yoshio Tarutani, Yoshitaka Nishiyama, Yasushi Matsuda
  • Patent number: 5824264
    Abstract: A high-temperature austenitic stainless steel having improved weldability is disclosed. The steel consists essentially, by weight, of:C: 0.05%-0.15%, Si: less than 1.0%, Mn: 2.0% or less,P: 0.04% or less, S: 0.01% or less, Cr: 20%-30%,Ni: 10%-15%, N: 0.10%-0.30%,B: 0.0010%-0.01%,one or two of La and Ce: 0.01%-0.10% in total,Al: 0.01%-0.20%, anda balance of Fe and incidental impurities, wherein the contents of N and Al satisfy the following inequality:% N+2.times.% Al.ltoreq.0.500%and the value for Ni balance (Ni bal.) of the steel calculated by the following formula is in the range of from -1.0% to +3.0%:Ni bal. (%)=% Ni+0.5.times.% Mn+30.times.(% C+% N)-1.1.times.(% Cr+1.5.times.% Si)+8.2.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: October 20, 1998
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hideki Uno, Yoshitaka Nishiyama, Yoshiatsu Sawaragi, Nobuo Otsuka, Kazuhiro Ogawa, Toshiro Anraku