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    • 2. 发明授权
    • Method for detecting cause of abnormal portion present on surface of
steel product
    • 钢产品表面存在异常部位原因的检测方法
    • US5784153A
    • 1998-07-21
    • US722276
    • 1996-10-09
    • Tadashi MochizukiShigeomi SatoTakanori AkiyoshiAkiko SakashitaYohichi Ishibashi
    • Tadashi MochizukiShigeomi SatoTakanori AkiyoshiAkiko SakashitaYohichi Ishibashi
    • G01N21/62G01N1/00G01N1/04G01N1/22G01N1/28G01N33/20G01N21/63G01N21/72G01N21/73
    • 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.sup.2 to 100 MW/mm.sup.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.
    • PCT No.PCT / JP96 / 01585 Sec。 371日期1996年10月9日第 102(e)1996年10月9日PCT PCT 1996年6月12日PCT公布。 出版物WO96 / 42005 日期:1996年12月27日一种用于检测存在于钢产品表面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 钢产品的表面及其附近,将脉冲激光束的照射点的脉冲激光束的脉冲能量密度限制在钢制品的表面上在10kW / mm 2至100MW / mm 2的范围内; 使脉冲激光束的照射点在含有异常部分及其附近的整个区域中进行曲折移动,以使照射点的之字形移动区域中的钢制品的表面部分气化,并将所得到的 将其蒸发成细颗粒,从而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分析如此收集的样品的化学成分,以检测存在于钢产品表面上的异常部分的原因。