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    • 33. 发明专利
    • Electromagnetic stainless steel
    • 电磁不锈钢
    • JP2012233246A
    • 2012-11-29
    • JP2011104317
    • 2011-05-09
    • Daido Steel Co Ltd大同特殊鋼株式会社
    • KIMURA EIUEDA SHIGENORISAITO AKIHIKO
    • C22C38/00C22C38/60H01F1/14
    • PROBLEM TO BE SOLVED: To provide an electromagnetic stainless steel in which an electric controllability is not deteriorated, that is, magnetic coercive force is not increased even when used for a long time in the discontinuous temperature atmosphere of 80 to 400°C.SOLUTION: The electromagnetic stainless steel contains, by mass%, ≤0.030% C, ≤0.030% N, ≤0.20% Si, 12.5-15.0% Cr, 0.30-1.00% Al, 0.01-0.50% Mn, 0.001-0.10% S, ≤0.010% O and the balance Fe with inevitable impurities and satisfies X≤1.2, 15≤Y≤20, 2≤Z≤6 and W≤[Cr], wherein X=30[C]+25[N]+[Ni]+0.5[Mn]+0.3[Cu], Y=5.5[Al]+2.0[Si]+[Cr]+1.5[Mo]+1.5[Ti]+5.0[V]+1.75[Nb]+1.75[Zr], Z=X-Y+20, and W=375[C]+250[N], and each of [ ] represents the content (mass%) of each element.
    • 解决的问题:为了提供电控制性不劣化的电磁不锈钢,即即使在80〜400℃的不连续的温度气氛中长时间使用也不会增加磁矫顽力 。 解决方案:电磁不锈钢以质量%计含有≤0.030%C,≤0.030%N,≤0.20%Si,12.5-15.0%Cr,0.30-1.00%Al,0.01-0.50%Mn,0.001- 0.10%S,≤0.010%O,余量为不可避免的杂质,满足X≤1.2,15≤Y≤20,2≤Z≤6且W≤[Cr],其中X = 30 [℃] +25 [N ] + [Ni] +0.5 [Mn] +0.3 [Cu],Y = 5.5 [Al] +2.0 [Si] + [Cr] +1.5 [Mo] +1.5 [Ti] +5.0 [V] +1.75 [Nb ] +1.75 [Zr],Z = X-Y + 20,W = 375 [C] +250 [N],各[...]表示各元素的含量(质量%)。 版权所有(C)2013,JPO&INPIT
    • 35. 发明专利
    • Heat resistant steel for exhaust valve
    • 排气阀耐热钢
    • JP2011219864A
    • 2011-11-04
    • JP2011068359
    • 2011-03-25
    • Daido Steel Co LtdHonda Motor Co Ltd大同特殊鋼株式会社本田技研工業株式会社
    • OSAKI MOTOTSUGUUEDA SHIGENORITSUYUNASHI TAKASHI
    • C22C38/00C22C38/58
    • C22C38/02C21D9/0068C22C38/001C22C38/44C22C38/48C22C38/58F01L3/02F01L2103/00F01L2820/00
    • PROBLEM TO BE SOLVED: To provide a heat resistant steel for an exhaust valve which is relatively low in Ni content an high in mechanical characteristics (for example, tensile strength, fatigue strength, abrasion resistance, hardness, etc.) at a high temperature, and excellent in corrosion resistance.SOLUTION: The heat resistant steel for an exhaust valve comprising the following configuration. (1) The head resistant steel for an exhaust valve comprises, by mass, more than 0.50% but less than 0.80% of C, more than 0.30% but less than 0.60% of N, 17.0% or more but less than 25.0% of Cr, 4.0% or more but less than 12.0% of Ni, 7.0% or more but less than 14.0% of Mn, 2.0% or more but less than 6.0% of Mo, more than 0.5% but less than 1.5% of Si, and 0.025% or more but less than 1.0% of Nb with the balance composed of Fe and unavoidable impurities and has a composition in which a content of P is regulated to less than 0.03 mass%. (2) The head resistant steel for an exhaust valve satisfies 0.85≤C+N≤1.3% by bass. (3) The head resistant steel for an exhaust valve satisfies 0.05≤Nb/C
    • 要解决的问题:为了提供一种排气门用耐热钢,其Ni含量相对较低,机械特性(例如拉伸强度,疲劳强度,耐磨性,硬度等)具有高的机械特性 耐高温,耐腐蚀性好。

      解决方案:用于排气门的耐热钢,其包括以下构造。 (1)排气门用耐磨钢,其质量分数为C以上的0.50%以上且0.80%以下,N:0.01%以上且0.60%以下,17.0%以上且25.0%以下 Cr,4.0%以上且小于12.0%的Ni,7.0%以上且小于14.0%的Mn,2.0%以上且小于6.0%的Mo,超过0.5%,但小于1.5%的Si, 和0.025%以上且小于1.0%的余量由Fe和不可避免的杂质组成,并且具有将P含量调节至小于0.03质量%的组成。 (2)排气门用耐头钢,低音为0.85≤C+N≤1.3%。 (3)排气门用耐头钢满足0.05≤Nb/ C <1.8。 版权所有(C)2012,JPO&INPIT

    • 38. 发明专利
    • Austenitic stainless steel
    • 奥氏体不锈钢
    • JP2008127590A
    • 2008-06-05
    • JP2006311257
    • 2006-11-17
    • Daido Steel Co Ltd大同特殊鋼株式会社
    • NARITA SHUJIUEDA SHIGENORIHAMANO SHUJISHIMIZU TETSUYA
    • C22C38/00C22C38/38C22C38/60
    • PROBLEM TO BE SOLVED: To provide austenitic stainless steel having excellent strength, ductility and corrosion resistance.
      SOLUTION: The stainless steel has a composition which consists of, by weight, 0.005 to 0.25% C, 0.2 to 0.8 to 1.30% N and the balance essentially Fe with inevitable impurities and in which the values of Nieq, PRE and OCRE, each defined as follows, are made to ≥20, ≥5 and ≥25, respectively: Nieq=[Ni]+0.41[Cr]-0.01[Cr]
      2 -2[Si]-0.4([Mo]+[W])+[Co]+0.6([Cu]+[Mn])+10([C]+[N]); PRE={[Cr]+3.3([Mo]+0.5[W])+16[N]}/[Mn]; OCRE=[Cr]+1.5([Mo]+0.5[W])+[Ni]+[Cu]-0.2[Mn]+2[N].
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供具有优异的强度,延展性和耐腐蚀性的奥氏体不锈钢。 解决方案:不锈钢具有以重量计0.005%至0.25%C,<2.0%Si,> 0.2至<10.0%Mn,≤0.03%P,≤0.05%S,15.0至30.0% %Cr,0.05〜8.0%Mo,0〜8.0%W,≤0.030%Al,≤0.020%O,> 0.8〜1.30%N,余量基本上为Fe与不可避免的杂质,其中Nieq,PRE和OCRE 每个定义如下,分别为≥20,≥5和≥25:Nieq = [Ni] +0.41 [Cr] -0.01 [Cr] 2 -2 [Si] -0.4 ([Mo]的+ [W])+ [CO] +0.6([铜] + [Mn]为)+ 10([C] + [N]); PRE = A [Cr]的3.3([Mo]的0.5 [W])+ 16 [N]} / [Mn]为; OCRE = [Cr]的1.5([Mo]的0.5 [W])+ [镍] + [铜] -0.2 [Mn]为2 [N]。 版权所有(C)2008,JPO&INPIT
    • 40. 发明专利
    • High strength fine wire, and method for producing the same
    • 高强度精细线及其制造方法
    • JP2006291261A
    • 2006-10-26
    • JP2005111267
    • 2005-04-07
    • Daido Steel Co LtdNippon Seisen Co Ltd大同特殊鋼株式会社日本精線株式会社
    • TAKAHATA NORITAKAUEDA SHIGENORISHIMIZU TETSUYAOMA HIDEYUKITANIMOTO YOSHINORIKAWABATA NAOYUKIKARAKI TAMOTSU
    • C22C19/05C22F1/00C22F1/10
    • PROBLEM TO BE SOLVED: To provide a high corrosion resistance and high strength fine wire having high tensile strength.
      SOLUTION: By cold wire drawing in a third wire drawing stage 26 and aging in the subsequent aging stage 28, a high corrosion-resistance fine wire 10 having tensile strength sufficiently higher than that of a base material can be obtained. Also, since the alloy composition in the base material is essentially consisting of Ni, suitable magnetic properties, i.e., a low magnetic permeability of about 1,003 can be obtained. Further, the magnetic permeability is not increased by cold or warm plastic working differently from the case of austenitic stainless steel represented by SUS 304. Also, the Ni based alloy composition in the base material comprises 30 to 45 (weight)% Cr, high corrosion resistance can be obtained. Further, the Ni based alloy composition in the base material does not comprise expensive metals, an inexpensive corrosion resistance and high strength fine wire can be obtained.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供具有高拉伸强度的高耐腐蚀性和高强度细线。 解决方案:通过在第三拉丝段26中进行冷拉丝并在随后的老化阶段28中老化,可以获得具有足够高于基材的拉伸强度的高耐腐蚀性细线10。 此外,由于基材中的合金组成基本上由Ni组成,因此可以获得合适的磁性,即低磁导率约为1,003。 此外,与由SUS304表示的奥氏体不锈钢的情况不同,冷或暖塑料的磁导率不会增加。另外,基体材料中的Ni基合金组成含有30〜45(重量)%的Cr,高腐蚀性 可获得电阻。 此外,基材中的Ni基合金组成不包含贵金属,可以获得廉价的耐腐蚀性和高强度的细线。 版权所有(C)2007,JPO&INPIT