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    • 62. 发明公开
    • METHOD OF DETERMINING CAUSE OF DEFECTS ON STEEL MATERIAL SURFACE
    • 方法ZUR BESTIMMUNG DER URSACHE VON DEFEKTEN AUFSTAHLOBERFLÄCHEN
    • EP0780677A1
    • 1997-06-25
    • EP96917647.8
    • 1996-06-12
    • NKK CORPORATION
    • MOCHIZUKI, TadashiSATO, ShigeomiAKIYOSHI, TakanoriSAKASHITA, AkikoISHIBASHI, Yohichi
    • G01N1/02G01N33/20G01N21/63G01N21/89
    • G01N33/20G01N1/04G01N2001/045
    • A method for detecting a cause of an abnormal portion present on a surface of a steel product, which comprises the steps of: condensing a pulsed laser beam, irradiating the pulsed laser beam thus condensed onto an abnormal portion present on a surface of a steel product and a vicinity thereof, limiting pulse energy density of the pulsed laser beam at an irradiation point of the pulsed laser beam on the surface of the steel product within a range of from 10 kW/mm 2 to 100 MW/mm 2 ; causing the irradiation point of the pulsed laser beam to zigzag-move throughout the entire region containing the abnormal portion and the vicinity thereof, to vaporize a surface portion of the steel product in the zigzag-moving region of the irradiation point, and converting the resultant vapor into fine particles, so as to collect samples of the abnormal portion and the vicinity thereof on the surface of the steel product in the form of fine particles; and continuously analyzing chemical compositions of the thus collected samples in the form of fine particles to detect a cause of an abnormal portion present on the surface of the steel product.
    • 一种用于检测存在于钢产品表面上的异常部分的原因的方法,包括以下步骤:将脉冲激光束进行冷凝,将由此冷凝的脉冲激光束照射到存在于钢产品表面上的异常部分 及其附近,将脉冲激光束的脉冲激光束的脉冲能量密度限制在10kW / mm 2至100MW / mm 2的范围内的钢产品表面上的脉冲激光束。 ; 使脉冲激光束的照射点在包含异常部分及其附近的整个区域中进行锯齿形移动,以使照射点的锯齿形移动区域中的钢制品的表面部分气化,并将所得物 蒸汽成细颗粒,以细颗粒的形式收集在钢制品表面上的异常部分及其附近的样品; 并且以细颗粒的形式连续地分析如此收集的样品的化学组成,以检测存在于钢产品表面上的异常部分的原因。
    • 68. 发明公开
    • Alloy sheet for shadow mask and method for manufacturing thereof
    • LegistungfürSchattenmaske und Verfahren zu dessen Herstellung
    • EP0739992A1
    • 1996-10-30
    • EP96101338.0
    • 1993-12-15
    • NKK CORPORATION
    • Inoue, TadashiTsuru, KiyoshiHiasa, Michihito
    • C22C38/08C21D8/02
    • H01J9/142C21D8/0205C21D8/0236C21D8/0263C21D8/0268C21D8/0273C22C38/08H01J2229/0733
    • An alloy sheet for making a shadow mask consisting essentially of 34 to 38 wt.% Ni, 0.1 wt.% or less Si, 0.003 wt.% or less B, 0.003 wt.% or less O, less than 0.002 wt.% N, 0.05 to 3 wt.% Cr and the balance being Fe and inevitable impurities;
         said alloy sheet after annealing before press-forming having 0.2% proof stress of 27.5 kgf/mm 2 or less; and
         a gathering degree of {211} plane on a surface of said alloy sheet being 16% or less.
      A method for manufacturing an alloy sheet for shadow mask comprising the steps of:

      (a) preparing a hot-rolled sheet containing Fe, Ni and Cr;
      (b) annealing said hot-rolled sheet in a temperature range of 910 to 990°C;
      (c) cold-rolling said annealed hot-rolled sheet to produce a cold-rolled sheet:
      (d) a final recrystallization annealing step of annealing said cold-rolled sheet subjected to the cold-rolling;
      (e) a finish cold-rolling step of cold-rolling the cold-rolled sheet subjected to the final recrystallization annealing at the cold-rolling reduction ratio in response to an average austenite grain size D (µm) yieleded by the final recrystallization annealing, the cold-rolling reduction ratio R (%) satisfying the equations below; 16 ≦ R≦75, 6.38D-133.9 ≦ R ≦ 6.38D-51.0
      (f) a stress relief annealing step of annealing the cold-rolled sheet subjected to the finish cold rolling;
      (g) a softening annealing step of annealing said cold-rolled sheet subjected to the finish cold-rolling in a temperature range of 700 to less than 800 °C for 0.5 to less than 60 min. before press-forming and on conditions satisfying the equation below; T ≧ -48.1 logt + 785,    where T( °C) is the temperature and t (min.) is the time of the annealing.
    • 用于制造基本上由34至38重量%的Ni,0.1重量%或更少的Si,0.003重量%或更少的B,0.003重量%或更少的O,小于0.002重量%的N组成的荫罩的合金薄片 ,0.05〜3重量%的Cr,余量为Fe和不可避免的杂质; 所述合金板在压制成形之后的退火后具有27.5kgf / mm 2以下的0.2%的有限应力; 并且在所述合金板的表面上的聚集度为ä211ü平面为16%以下。 一种荫罩用合金薄板的制造方法,其特征在于,包括:(a)制备含有Fe,Ni,Cr的热轧板; (b)在910〜990℃的温度范围内退火所述热轧板; (c)冷轧所述退火的热轧板以制造冷轧板;(d)对经过冷轧的冷轧板退火的最终再结晶退火步骤; (e)根据通过最终再结晶退火得到的平均奥氏体晶粒尺寸D(μm),以冷轧压下率冷轧经过最终再结晶退火的冷轧板的精轧冷轧工序 ,满足以下等式的冷轧压下率R(%) (f)对经过精冷轧的冷轧板退火的应力消除退火工序; (g)软化退火工序,在700〜800℃的温度范围内对经过精冷轧的冷轧板进行0.5〜60分钟的退火。 在压制成形之前和满足以下等式的条件下进行。 其中T(℃)为温度,t(min。)为退火时间。