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    MX CARBONITRIDE PRECIPITATION-STRENGTHENED HEAT-RESISTANT STEEL
    1.
    发明专利
    MX CARBONITRIDE PRECIPITATION-STRENGTHENED HEAT-RESISTANT STEEL 审中-公开

    公开(公告)号：JP2006348385A

    公开(公告)日：2006-12-28

    申请号：JP2006177981

    申请日：2006-06-28

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： YAMADA KATSUMI ,  OKADA KOICHI ,  MUNEKI MASAICHI ,  ABE FUJIO

    IPC: C22C38/00 ,  C22C38/54

    Abstract: PROBLEM TO BE SOLVED: To provide an MX carbonitride precipitation-strengthened heat-resistant steel which is a heat-resistant steel utilizing a strengthening mechanism by the precipitation of carbonitride and in which the high-temperature creep strength at 600 to 650°C is improved. SOLUTION: The MX carbonitride precipitation-strengthened heat-resistant steel utilizes a strengthening mechanism by the precipitation of MX carbonitride and has the improved high-temperature creep strength at 600 to 650°C, wherein the content of a compound MX carbonitride comprising NbC (TaC) and VN is restricted to below 30% by weight with respect to the entire precipitated MX carbonitride. COPYRIGHT: (C)2007,JPO&INPIT

    TWO-PHASES OR THREE-PHASES STRUCTURE IN TEMPERATURE RANGE OF 650°C OR HIGHER OF MARTENSITIC HEAT-RESISTANT STEEL
    2.
    发明专利
    TWO-PHASES OR THREE-PHASES STRUCTURE IN TEMPERATURE RANGE OF 650°C OR HIGHER OF MARTENSITIC HEAT-RESISTANT STEEL 审中-公开

    公开(公告)号：JP2003253397A

    公开(公告)日：2003-09-10

    申请号：JP2002104524

    申请日：2002-02-28

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： YAMADA KATSUMI ,  MUNEKI MASAICHI ,  OKADA KOICHI ,  IGARASHI MASAAKI ,  ABE FUJIO

    IPC: F01D5/28 ,  C22C38/00 ,  C22C38/30

    Abstract: PROBLEM TO BE SOLVED: To improve a high-temperature creep property in a temperature range of 650°C or higher of a martensitic heat-resistant steel, enable the higher high- temperature creep property to be kept for a long time, make the thermal expansion characteristics in the temperature range of 650°C or higher to be low, and improve the thermal fatigue characteristics. SOLUTION: In the martensitic heat-resistant steel having a martensite single- phase structure at room temperature, in which carbides do not precipitate, a structure in the temperature range of 650°C or higher has two-phases comprising an austenitic phase of a parent phase and a finely dispersed and precipitated intermetallic compound phase, or three phases comprising the austenitic phase of the parent phase, a ferritic phase and the finely dispersed and precipitated intermetallic compound phase. COPYRIGHT: (C)2003,JPO

    FERRITIC HEAT−RESISTANT STEEL AND METHOD FOR PRODUCTION THEREOF
    4.
    发明申请
    FERRITIC HEAT−RESISTANT STEEL AND METHOD FOR PRODUCTION THEREOF 审中-公开
    耐热钢及其生产方法

    公开(公告)号：WO02086176A8

    公开(公告)日：2003-02-27

    申请号：PCT/JP0203933

    申请日：2002-04-19

    Applicant: NAT INST FOR MATERIALS SCIENCE ,  MITSUBISHI HEAVY IND LTD ,  TANEIKE MASAKI ,  ABE FUJIO

    Inventor： TANEIKE MASAKI ,  ABE FUJIO

    IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/52 ,  C22C38/54

    CPC classification number: C22C38/04 ,  C21D6/002 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32

    Abstract: A ferritic heat−resistant steel which comprises, in wt %, 1.0 to 13 % of chromium, 0.1 to 8.0 % of cobalt, 0.01 to 0.20 % of nitrogen, 3.0 % or less of nickel, 0.01 to 0.50 % of one or more elements selected from the group consisting of vanadium, niobium, tantalum, titanium, hafnium and zirconium, which form MX type precipitates, and 0.01 % or less of carbon, as constituting elements, the balance being substantially composed of iron and inevitable impurities, and has a metal structure wherein MX type precipitates are formed over the whole of grain boundaries and the surface within grains and M 23 C 6 type precipitates are present on grain boundaries in an area percentage of 50 % or less. The ferritic heat−resistant steel exhibits excellent creep characteristics even at a high temperature exceeding 600 ˚ C.

    Abstract translation: 一种铁素体系耐热钢，其特征在于，以重量％计含有1.0〜13％的铬，0.1〜8.0％的钴，0.01〜0.20％的氮，3.0％以下的镍，0.01〜0.50％的一种或多种元素 选自形成MX型沉淀物的钒，铌，钽，钛，铪和锆，和0.01％以下的碳作为构成元素，余量基本上由铁和不可避免的杂质构成，并且具有 金属结构，其中MX型沉淀物形成在整个晶界上，并且晶粒内的表面和M 23 C 6 S 6+型沉淀物存在于晶界上，面积百分比 50％以下。 铁素体耐热钢即使在超过600℃的高温下也表现出优异的蠕变特性。

    FERRITIC HEAT-RESISTANT STEEL AND METHOD FOR PRODUCTION THEREOF
    7.
    发明公开
    FERRITIC HEAT-RESISTANT STEEL AND METHOD FOR PRODUCTION THEREOF 有权
    FERRITISCHERWÄRMEBESTÄNDIGERSTAHL UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号：EP1382701A4

    公开(公告)日：2004-12-08

    申请号：EP02722713

    申请日：2002-04-19

    Applicant: NAT INST FOR MATERIALS SCIENCE ,  MITSUBISHI HEAVY IND LTD

    Inventor： TANEIKE MASAKI ,  ABE FUJIO

    IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/52 ,  C22C38/54 ,  C22C38/18

    CPC classification number: C22C38/04 ,  C21D6/002 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32

    Abstract: A ferritic heat−resistant steel which comprises, in wt %, 1.0 to 13 % of chromium, 0.1 to 8.0 % of cobalt, 0.01 to 0.20 % of nitrogen, 3.0 % or less of nickel, 0.01 to 0.50 % of one or more elements selected from the group consisting of vanadium, niobium, tantalum, titanium, hafnium and zirconium, which form MX type precipitates, and 0.01 % or less of carbon, as constituting elements, the balance being substantially composed of iron and inevitable impurities, and has a metal structure wherein MX type precipitates are formed over the whole of grain boundaries and the surface within grains and M 23 C 6 type precipitates are present on grain boundaries in an area percentage of 50 % or less. The ferritic heat−resistant steel exhibits excellent creep characteristics even at a high temperature exceeding 600 ˚ C.

    Abstract translation: 即使在超过600℃的高温下也显示优异的蠕变特性的铁素体耐热钢，以重量百分比计含有1.0〜13％的铬，0.1〜8.0％的钴，0.01〜0.20％ 的氮，3.0％以下的镍，0.01〜0.50％的一种或多种选自钒系，铌，钽，钛，铪和锆的元素，其为MX型沉淀形成元素，0.01％或 少量的碳和余量基本上是铁和不可避免的杂质，其中MX型析出物在晶界和整个晶粒中沉淀，并且在晶界析出的M23C6型沉淀物的晶界存在比率为50％以下。

    10.
    发明专利
    未知

    公开(公告)号：DE60234169D1

    公开(公告)日：2009-12-10

    申请号：DE60234169

    申请日：2002-04-19

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： TANEIKE MASAKI ,  ABE FUJIO

    IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/52 ,  C22C38/54

    Abstract: A ferritic heat-resistant steel, which exhibits excellent creep characteristics even at a high temperature exceeding 600 DEG C, comprises, on the basis of percent by weight, 1.0 to 13% of chromium, 0.1 to 8.0% of cobalt, 0.01 to 0.20% of nitrogen, 3.0% or less of nickel, 0.01 to 0.50% of one or more of elements selected from the group consisting of vanadium, niobium, tantalum, titanium, hafnium, and zirconium that are MX type precipitate forming elements, and 0.01% or less of carbon and the balance being substantially iron and inevitable impurities, wherein the MX type precipitates precipitate on grain boundaries and in entire grains and the grain boundary existing ratio of an M23C6 type precipitate precipitating on the grain boundaries is 50% or less.

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