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    • 1. 发明专利
    • Martensitic iron based heat resistant alloy
    • 马氏体耐热合金
    • JP2007162112A
    • 2007-06-28
    • JP2005363397
    • 2005-12-16
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • YOSHIZAWA MITSURUIGARASHI MASAAKISANO NAOYUKI
    • C22C38/00C21D8/00C22C38/38C22C38/58
    • PROBLEM TO BE SOLVED: To provide a martensitic heat resistant alloy having excellent high temperature long time creep strength suitable for a steel tube for a heat exchanger, a steel sheet for a pressure vessel, a turbine material or the like used under high temperature-high pressure environments in a boiler, nuclear power generation equipment, chemical industry equipment or the like.
      SOLUTION: The martensitic iron based heat resistant alloy has a composition comprising, by mass, 8 to 16% Cr, 1 to 18% Co, 0.01 to 1% Si, 0.01 to 3% Mn, 0.0005 to 0.03% B, 0.001 to 0.1% sol.Al and 0 to 0.5% Cu, further comprising either or both of ≤2% Mo and ≤5% W in the ranges satisfying inequality (1), and the balance Fe with impurities satisfying ≤0.05% C, ≤0.01% N, ≤0.05% P and ≤0.02% S, and has a modulated structure in the using process in the temperature region of ≥575°C. The steel may comprise one or more kinds selected from Nb, V, Ni, Ta, Hf, Ti, REM, Ca and Mg as well. (1): Mo+(1/2)W≥0.5%, wherein Mo and W denote the respective contents (mass%).
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种适用于热交换器用钢管的高温长时间蠕变强度优异的马氏体系耐热合金,在高压下使用的压力容器用钢板,涡轮机材料等 锅炉,核能发电设备,化工设备等的高温环境。 解决方案:马氏体系铁基耐热合金的组成为:以质量计含有8〜16%的Cr,1〜18%的Co,0.01〜1%的Si,0.01〜3%的Mn,0.0005〜0.03%的B, 0.001〜0.1%的sol.Al和0〜0.5%的Cu,在满足不等式(1)的范围内进一步包含≤2%Mo和≤5%W中的任一种或两者,余量为Fe,杂质≤0.05%C, ≤0.01%N,≤0.05%P和≤0.02%S,并且在≥575℃的温度范围内的使用过程中具有调制结构。 钢可以包含Nb,V,Ni,Ta,Hf,Ti,REM,Ca和Mg中的一种或多种。 (1):Mo +(1/2)W≥0.5%,其中Mo和W表示各自的含量(质量%)。 版权所有(C)2007,JPO&INPIT
    • 4. 发明专利
    • Martensitic heat-resistant iron alloy and its production method
    • 马氏体耐热铁合金及其生产方法
    • JP2004143513A
    • 2004-05-20
    • JP2002308705
    • 2002-10-23
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • YOSHIZAWA MITSURUIGARASHI MASAAKI
    • C21D6/00C22C38/00C22C38/58
    • PROBLEM TO BE SOLVED: To provide a martensitic heat-resistant iron alloy excellent in high-temperature long-time creep strength and resistance to steam oxidation.
      SOLUTION: This heat-resistant alloy contains 0.01 mass% or lower C (or 0.005-0.02 mass% C and 0.01-0.15 mass% Nb), higher than 10 mass% but 15 mass% or lower Cr, 0.025-1 mass% Si, 5 mass% or lower Mo, 5-15 mass% W, etc., further contains at least one element selected from among 15 mass% or lower Co, 15 mass% or lower Ni, and 5 mass% or lower Cu, and may further contain at least one element selected from among 0.15 mass% or lower Ta, 0.1 mass% or lower Ti, and 0.05 mass% or lower Nd, the balance being Fe and impurities. The composition of the alloy satisfies the formula, Cr+6Si+4Mo+1.5W+12Al+5Nb+8Ti-4Ni-2Mn-Cu-2Co≤15. The alloy is produced by subjecting an alloy with the above-described composition to hot rolling and to normalizing after heating at 1,050-1,200°C.
      COPYRIGHT: (C)2004,JPO
    • 待解决的问题:提供高温长时间蠕变强度和耐蒸汽氧化性能优异的马氏体耐热铁合金。 解决方案:该耐热合金含有0.01质量%以下的C(或0.005-0.02质量%的C和0.01-0.15质量%的Nb),高于10质量%但高于15质量%或更低的Cr,0.025-1 质量%Si,5质量%以下的Mo,5〜15质量%的W等,还含有选自15质量%以下的Co,15质量%以下的Ni和5质量%以下的至少一种元素 Cu,还可以含有选自0.15质量%以下的Ta,0.1质量%以下的Ti和0.05质量%以下的Nd中的至少一种元素,余量为Fe和杂质。 合金的组成满足式Cr + 6Si + 4Mo + 1.5W + 12Al + 5Nb + 8Ti-4Ni-2Mn-Cu-2Co≤15。 该合金通过将上述组成的合金进行热轧,并在1050〜1200℃加热后进行归一化而制造。 版权所有(C)2004,JPO
    • 6. 发明专利
    • Low alloy steel for high pressure hydrogen gas environment, and vessel for high pressure hydrogen
    • 用于高压氢气环境的低合金钢和高压氢气的容器
    • JP2009074122A
    • 2009-04-09
    • JP2007242973
    • 2007-09-19
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • OMURA TOMOHIKOMIYAHARA MITSUOSENBA MITSUYUKIIGARASHI MASAAKI
    • C22C38/00C22C38/12C22C38/38F17C1/00
    • C22C38/02C22C38/04C22C38/06C22C38/12Y02E60/321
    • PROBLEM TO BE SOLVED: To provide a low alloy steel having excellent hydrogen environmental embrittlement resistance in spite of its high strength satisfying the tensile strength of ≥900 MPa.
      SOLUTION: The low alloy steel for a high pressure hydrogen gas environment has a composition including, by mass, 0.15 to 0.60% C, 0.05 to 0.5% Si, 0.05 to 3.0% Mn, ≤0.025% P, ≤0.010% S, 0.005 to 0.10% Al, 0.5 to 3.0% Mo, 0.05 to 0.30% V, ≤0.01% O (oxygen) and ≤0.03% N, and the balance Fe with impurities, and whose tensile strength is ≥900 MPa. It is desirable that 0.0003 to 0.003% B is incorporated into the low alloy steel, but, in this case, the content of N is restricted to ≤0.010%. Further, one or more kinds selected from Cr, Nb, Ti, Zr and Ca are desirably incorporated therein. The contents of Mo and V are desirably allowed to satisfy the inequality (1): (1) [Mo(%)]×[V(%)]
      0.2 ≥0.32.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供具有优异的耐氢环境脆性的低合金钢,尽管其高强度满足≥900MPa的拉伸强度。 解决方案:用于高压氢气环境的低合金钢具有以质量计含有0.15-0.60%C,0.05-0.5%Si,0.05-3.0%Mn,≤0.025%P,≤0.010% S,0.005〜0.10%的Al,0.5〜3.0%的Mo,0.05〜0.30%的V,≤0.01%的O(氧)和≤0.03%的N,余量为Fe与杂质,其拉伸强度≥900MPa。 优选在低合金钢中加入0.0003〜0.003%的B,但在这种情况下,N的含量被限制在≤0.010%。 此外,期望地包含选自Cr,Nb,Ti,Zr和Ca中的一种或多种。 Mo和V的含量优选满足不等式(1):(1)[Mo(%)]×[V(%)] 0.2 ≥0.32。 版权所有(C)2009,JPO&INPIT
    • 7. 发明专利
    • METHOD FOR TREATING MOLTEN IRON BY ADDITION OF La AND/OR Ce
    • 通过添加La和/或Ce处理铁的方法
    • JP2009024189A
    • 2009-02-05
    • JP2007185491
    • 2007-07-17
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • NAKAZATO HIDEKIUSUI TAKEONUMATA MITSUHIROYOSHIDA NAOTADATAGUCHI KENJIIGARASHI MASAAKI
    • C21C7/064C21C7/00C21C7/04C22C19/05C22C38/00C22C38/06C22C38/58
    • PROBLEM TO BE SOLVED: To provide a treatment method which reduces the concentration of dissolved P by efficiently forming P inclusions in molten iron by the addition of La and/or Ce, and also does not need to remove the formed inclusions.
      SOLUTION: When adding La and/or Ce into the molten iron containing 3.5% or less of C, 2.5% or less of Si, 3.0% or less of Mn, 0.0001 to 0.5% of P, and 3.0% or less of Al, the method for treating the molten iron includes: setting (CaO/Al
      2 O
      3 ) in slag at 0.5 to 11 and (CaO/SiO
      2 ) at 0.45 or more; and controlling [R] (mass%) which is the concentration of La and/or Ce in the molten iron, according to [P] which is the concentration of P in the molten iron, [O] which is the concentration of O and [S] which is the concentration of S (mass%, respectively), so as to satisfy the following expression (1), preferably the expression (2), and more preferably the expression (3) in addition to the expressions of (1) or (2), wherein the expression (1) is 5.5×10
      -5 /[P]≤[R]; the expression (2) is 5.5×10
      -5 /[P]≤[R]≤8.6×10
      -3 /[P]; and the expression (3) is 0.1
    • 要解决的问题:提供通过添加La和/或Ce通过有效地形成铁水中的P夹杂物来降低溶解P的浓度的处理方法,并且也不需要除去形成的夹杂物。 解决方案:当将La和/或Ce添加到含有3.5%以下的C,2.5%以下的Si,3.0%以下的Mn,0.0001〜0.5%的P和3.0%以下的铁水中时, 的铝的处理方法包括:将炉渣中的0.5〜11的(CaO / SiO 2·SB)2(CaO / SiO 2 / SB> 3 )为0.45以上; 根据作为铁水中P浓度的[P],作为O浓度的O [O]控制作为铁水中La和/或Ce浓度的[R](质量%), 为了满足下面的表达式(1),优选表达式(2),更优选表达式(3),除了表达式(1)之外,其中S(分别为质量%)的浓度为[S] )或(2),其中表达式(1)为5.5×10 -5 / [P]≤[R]; 表达式(2)为5.5×10 -5 / [P]≤[R]≤8.6×10 -3 / [P] (3)为0.1 <ä[R] -0.8([S] + [O])} /(0.8 [P])<28。 版权所有(C)2009,JPO&INPIT
    • 8. 发明专利
    • TREATMENT METHOD FOR MOLTEN IRON BY Nd AND Ca ADDITION
    • Nd和Ca添加剂对铁的处理方法
    • JP2007327122A
    • 2007-12-20
    • JP2006160828
    • 2006-06-09
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • NUMATA MITSUHIROMATSUO TORUYOSHIDA NAOTADAIGARASHI MASAAKI
    • C21C7/04B22D1/00B22D11/108C21C7/00C21C7/064
    • PROBLEM TO BE SOLVED: To provide a treatment method for molten iron by which soluble P concentration in the molten iron can be reduced by producing P compound by the addition of a little quantity of Nb and the molten iron excellent in continuous castability and high in cleanliness can be produced.
      SOLUTION: In this treatment method, the Nd is added into the molten iron containing ≥0.0001% to ≤0.5% P, ≤0.005% S and ≤0.005% O(oxygen), then the Nd concentration in the molten iron is controlled so as to satisfy inequalities (1) and (2) according to P, S and O concentrations in the molten iron, and then Ca is added into the molten metal and the Ca concentration is controlled so as to satisfy ineqality (3) according to the Nd concentration in the molten iron. A=0.24[P]+0.82[S]+0.85[O]...(1). A+0.005≤[Nd]≤A+0.03...[2]. 1.2×10
      -2 ×[Nd]
      2/3 ≤[Ca]≤1.6×10
      -2 ×[Nd]
      2/3 +0.15...(3). Wherein, [P], [S], [O], [Nd] and [Ca] denote concentrations (mass%) of respective elements.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种铁水的处理方法,通过添加少量的Nb和连续铸造性优异的铁水,通过生产P化合物可以降低铁水中的可溶性P浓度, 可以生产清洁度高。

      解决方案:在该处理方法中,将Nd添加到含有≥0.0001%至≤0.5%P,≤0.005%S和≤0.005%O(氧)的铁水中,然后将铁水中的Nd浓度 根据铁水中的P,S和O浓度控制满足不等式(1)和(2),然后将Ca加入到熔融金属中,并且控制Ca浓度以满足秩序(3),根据 到铁水中的Nd浓度。 A = 0.24 [P] +0.82 [S] + 0.85×[O] ...(1)。 A +0.005≤[钕]≤A+ 0.03 ... [2]。 1.2×10 -2 ×[钕] 2/3 ≤[CA]≤1.6×10 -2 ×[钕] 2/3 0.15 ...(3)。 其中,[P],[S],[O],[Nd]和[Ca]表示各元素的浓度(质量%)。 版权所有(C)2008,JPO&INPIT

    • 9. 发明专利
    • TREATMENT METHOD FOR MOLTEN IRON BY Nd ADDITION
    • 用Nd添加剂处理铁的处理方法
    • JP2007186729A
    • 2007-07-26
    • JP2006003489
    • 2006-01-11
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • NAKAZATO HIDEKIUSUI TAKEONUMATA MITSUHIROMATSUO TORUYOSHIDA NAOTADAIGARASHI MASAAKI
    • C21C7/064C21C7/04C22C37/00C22C38/00C22C38/58
    • PROBLEM TO BE SOLVED: To provide a treatment method for molten iron where, when NdP is produced into molten iron by Nd addition, the hindering action of oxygen and sulfur in the molten iron is excluded, and the excellent reduction effect of the concentration in melted P can be secured.
      SOLUTION: In the method for treating molten iron, when Nd is added to molten iron comprising 0.0001 to 0.5% P, ≤0.005% O (oxygen) and ≤0.005% S, so as to control the concentration of Nd in the molten iron to 0.001% to 1%, the value of (CaO/Al
      2 O
      3 ) in the slag is regulated to 0.7 to 9 and the value of (CaO/SiO
      2 ) in the slag is regulated to ≥0.65, thus the concentration of Nd in the molten iron: [Nd](mass%) is controlled so as to satisfy the relation expressed by the inequality (1) of 0.2
    • 要解决的问题:为了提供一种铁水处理方法,其中当通过Nd添加将NdP制成铁水时,排除了铁和铁中的氧和硫的阻碍作用,并且优异的还原效果 可以确保熔化的P中的浓度。 解决方案:在用于处理铁水的方法中,当将Nd添加到包含0.0001至0.5%P,≤0.005%O(氧)和≤0.005%S的铁水中时,以控制Nd中的Nd浓度 铁水的含量为0.001〜1%,炉渣中的(CaO / Al 2 O 3 )为0.7〜9,(CaO / 炉渣中的SiO 2 )调节为≥0.65,从而控制铁水中的Nd浓度[Nd](质量%),以满足不等式(1 )根据铁水中的P浓度为0.2 <ä[Nd] -0.8([S] + [O])} /(0.8 [P])<20(1):[P](质量% ),铁水中的O浓度为[O](质量%),铁水中的S浓度为[S](质量%)。 版权所有(C)2007,JPO&INPIT
    • 10. 发明专利
    • TREATMENT METHOD FOR MOLTEN IRON BY Nd ADDITION
    • 用Nd添加剂处理铁的处理方法
    • JP2007186722A
    • 2007-07-26
    • JP2006003257
    • 2006-01-11
    • Sumitomo Metal Ind Ltd住友金属工業株式会社
    • NAKAZATO HIDEKIUSUI TAKEOMATSUO TORUNUMATA MITSUHIROYOSHIDA NAOTADAIGARASHI MASAAKI
    • C21C7/04C21C7/064
    • PROBLEM TO BE SOLVED: To provide a treatment method for molten iron where, when NdP inclusions are efficiently formed into molten iron by the addition of Nd, so as to reduce the concentration of dissolved P, and there is no need of removing the inclusions. SOLUTION: In the method for treating molten iron, when Nd is added to molten iron comprising ≤3.5% C, ≤2.5% Si, ≤3% Mn, 0.0001 to 0.5% P and ≤3% Al, the value of (CaO/Al 2 O 3 ) in slag is regulated to 0.7 to 9 and the value of (CaO/SiO 2 ) in the slag is regulated to ≥0.65, thus the concentration of Nd in the molten iron: [Nd](mass%) is controlled so as to satisfy the relation expressed by the inequality (1) or (2) in accordance with the concentration of P in the molten iron: [P](mass%): 4.8×10 -5 /[P]≤[Nd] (1), and 4.8×10 -5 /[P]≤[Nd]≤9.6×10 -3 /[P] (2). COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题提供一种铁水处理方法,其中当通过添加Nd将NdP夹杂物有效地形成为铁水时,以降低溶解的P的浓度,并且不需要除去 夹杂物。 解决方案:在铁水处理方法中,当添加到铁含有≤3.5%C,≤2.5%Si,≤3%Mn,0.0001-0.5%P和≤3%Al的铁水时, (CaO / Al 2 O 3 )调节为0.7〜9,炉渣中的(CaO / SiO 2 被调节至≥0.65,因此铁水中的Nd浓度[Nd](质量%)被控制为满足由不等式(1)或(2)表示的关系,根据P的浓度 铁水:[P](质量%):4.8×10 -5 / [P]≤[Nd](1)和4.8×10 -5 [P]≤[Nd]≤9.6×10 -3 / [P](2)。 版权所有(C)2007,JPO&INPIT