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    • 1. 发明专利
    • Method for manufacturing chromium-based stainless-steel reinforcing bar
    • 用于制造基于铬的不锈钢加固棒的方法
    • JP2011026686A
    • 2011-02-10
    • JP2009176378
    • 2009-07-29
    • Aichi Steel Works Ltd愛知製鋼株式会社
    • GOTO MANKEIMATSUURA KOTARONAKAGAWA HIDEKI
    • C21D9/52C21D1/26C21D6/00C22C38/00C22C38/40
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing a chromium-based stainless-steel reinforcing bar, which can stably and easily manufacture the reinforcing bar so as to enter an aimed strength classification.
      SOLUTION: The method for manufacturing the chromium-based stainless-steel reinforcing bar includes: preparing a steel material including, by mass%, 0.15% or less C, 1.00% or less Si, 1.00% or less Mn, 0.040% or less P, 0.030% or less S, 0.60% or less Ni, 11.0-13.5% Cr, 0.15% or less N and the balance Fe with unavoidable impurities; hot-rolling the steel material; and annealing the hot-rolled material at a temperature of 600°C or higher and in such a condition that a tempering parameter of T(20+logt)/1,000 (T is annealing temperature (K), t is annealing period of time (hr) and log is a common logarithm) is in a range of 17.0-23.0.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 解决的问题:提供一种可以稳定且容易地制造钢筋的铬基不锈钢钢筋的制造方法,以进入目标强度分级。 解决方案:用于制造铬基不锈钢钢筋的方法包括:制备钢材,以质量%计含有0.15%以下的C,1.00%以下的Si,1.00%以下的Mn,0.040% 或更小的P,0.030%以下的S,0.60%以下的Ni,11.0〜13.5%的Cr,0.15%以下的N,余量为Fe的不可避免的杂质; 热轧钢材; 在600℃以上的温度下退火,在回火参数T(20 + logt)/ 1000(T为退火温度(K))的条件下退火,t为退火时间 hr),log为常用对数)在17.0-23.0的范围内。 版权所有(C)2011,JPO&INPIT
    • 2. 发明专利
    • Surface-treated stainless steel excellent in design characteristics and corrosion resistance and method for producing the same
    • 表面处理不锈钢优良的设计特性和耐腐蚀性及其生产方法
    • JP2008274386A
    • 2008-11-13
    • JP2007122359
    • 2007-05-07
    • Aichi Steel Works Ltd愛知製鋼株式会社
    • KUBOTA KAZUMASAGOTO MANKEI
    • C25F3/24C22C38/00C22C38/58
    • PROBLEM TO BE SOLVED: To provide a surface-treated stainless steel whose corrosion resistance can be markedly improved by electropolishing its surface without deteriorating its design. SOLUTION: The stainless steel excellent in design characteristics and corrosion resistance is obtained by conducting a surface treatment on the surface of an austenitic stainless steel from which scale has been removed after rolling and solution heat treatment. Its surface achieves a surface undulation having a roughness Ra of ≥1.8 μm formed by design characteristics improvement treatment and acquires a passive film having a markedly high Cr content compared to a base metal by an electropolishing treatment and a passivation treatment. The area of Cu-enriched regions observed in pitting parts after a pitting potential measurement test is 0.1 μm 2 per 1.0 cm 2 measured area. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种表面处理的不锈钢,其耐腐蚀性可以通过电抛光其表面而显着改善,而不会使其设计恶化。 解决方案:通过对在轧制和固溶热处理后除去氧化皮的奥氏体不锈钢的表面进行表面处理,可以获得优异的设计特性和耐腐蚀性的不锈钢。 其表面通过设计特征改进处理形成具有≥1.8μm的粗糙度Ra的表面起伏,并且通过电抛光处理和钝化处理获得与贱金属相比具有显着高的Cr含量的钝化膜。 点蚀电位测定试验后,点蚀部分观察到的富Cu区域的面积为每1.0 cm 2测量面积0.1μm 2 。 版权所有(C)2009,JPO&INPIT
    • 3. 发明专利
    • Austenitic stainless steel with excellent machinability
    • 具有优异机械性能的奥氏体不锈钢
    • JP2006249517A
    • 2006-09-21
    • JP2005068871
    • 2005-03-11
    • Aichi Steel Works Ltd愛知製鋼株式会社
    • GOTO MANKEIOKURA KAZUTAKAKAJINO TAKASHITANAKA TATSUO
    • C22C38/00C22C38/60
    • PROBLEM TO BE SOLVED: To improve the machinability of austenitic stainless steel without deteriorating corrosion resistance under the wide range of conditions ranging from machining in the low machining speed region suitable for machining using high speed steel tools to machining in the high machining speed region suitable for machining using cemented carbide tools.
      SOLUTION: In the austenitic stainless steel with excellent machinability, the main composition of oxide inclusions consists of CaO, MnO, Al
      2 O
      3 and SiO
      2 . Further, in the total number of the existing oxide inclusions, the ratio of the total of tridymite, pseudo-wollastonite, wollastonite, cristobalite and rhodonite is ≥25% and the ratio of the total of an Al
      2 O
      3 -containing oxide inclusion anorthite and MnO-containing anorthite-MnO and mullite-MnO is ≥10%.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了提高奥氏体不锈钢的机械加工性,在适用于使用高速钢工具加工的低加工速度区域的加工范围广泛的条件下,在高加工速度下进行加工的条件下,不会劣化耐腐蚀性 适用于使用硬质合金工具加工的区域。 解决方案:在具有优良机械加工性能的奥氏体不锈钢中,氧化物夹杂物的主要成分由CaO,MnO,Al O 3 和SiO 。 此外,在现有的氧化物夹杂物的总数中,鳞石英,假硅灰石,硅灰石,方石英和紫红石的总量的比例为≥25%,Al 2 含有氧化锡的钙钛矿和含MnO的钙长石MnO和莫来石 - MnO的含量为<10%。 版权所有(C)2006,JPO&NCIPI