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公开(公告)号：EP3020833A1
公开(公告)日：2016-05-18
申请号：EP14822459.5
申请日：2014-06-04
发明人： FURUMAI, Kohei , ARAMAKI, Norichika , MIKI, Yuji , MURAI, Takeshi , INOUE, Toru , USUI, Yukio , ISHIDA, Tomoharu
摘要： A method of producing a steel material according to the present invention is characterized in that Ca is added to molten steel in an amount within the range satisfying a prescribed formula. After secondary refining, the amount of Al 2 O 3 in the molten steel may be analyzed, and then CaSi may be added to the molten steel in a ladle. The amount of Al 2 O 3 in the molten steel may be analyzed using spark discharge atomic emission spectroscopy as follows. The ratio of the intensity of light emission from aluminum to the intensity of light emission from iron is determined for each of a plurality of discharge pulses. An alumina fraction is computed using a prescribed formula, and the obtained light emission intensity ratios of the discharge pulses are arranged in ascending order. A light emission intensity ratio at a certain position equal to or lower than 30% of the total number of discharge pulses is used as a representative aluminum intensity ratio. Then an alumina intensity ratio (= the alumina fraction x the representative aluminum intensity ratio) is computed using the product of the computed alumina fraction and the representative aluminum intensity ratio, and the amount of alumina (in the steel) may computed using the relational formula between the alumina intensity ratio and the amount of alumina (in the steel) determined by chemical analysis.
摘要翻译： 根据本发明的钢材的制造方法的特征在于，在满足规定式的范围内，将Ca添加到钢水中。 在二次精炼之后，可以分析钢水中的Al 2 O 3的量，然后可以将钢水中的CaSi加入到钢水中。 可以如下使用火花放电原子发射光谱法分析钢水中的Al 2 O 3的量。 对于多个放电脉冲中的每一个确定铝的发光强度与来自铁的发光强度的比率。 使用规定的公式计算氧化铝分数，并且获得的放电脉冲的发光强度比以升序排列。 使用等于或低于放电脉冲总数的30％的特定位置处的发光强度比作为代表性的铝强度比。 然后使用计算的氧化铝分数和代表性铝强度比的乘积计算氧化铝强度比（=氧化铝分数×代表性铝强度比），并且可以使用关系式计算氧化铝（在钢中）的量 氧化铝强度比和通过化学分析确定的氧化铝（在钢中）的量。
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公开(公告)号：EP3020833B1
公开(公告)日：2018-04-11
申请号：EP14822459.5
申请日：2014-06-04
发明人： FURUMAI, Kohei , ARAMAKI, Norichika , MIKI, Yuji , MURAI, Takeshi , INOUE, Toru , USUI, Yukio , ISHIDA, Tomoharu
摘要： A method of producing a steel material according to the present invention is characterized in that Ca is added to molten steel in an amount within the range satisfying a prescribed formula. After secondary refining, the amount of Al 2 O 3 in the molten steel may be analyzed, and then CaSi may be added to the molten steel in a ladle. The amount of Al 2 O 3 in the molten steel may be analyzed using spark discharge atomic emission spectroscopy as follows. The ratio of the intensity of light emission from aluminum to the intensity of light emission from iron is determined for each of a plurality of discharge pulses. An alumina fraction is computed using a prescribed formula, and the obtained light emission intensity ratios of the discharge pulses are arranged in ascending order. A light emission intensity ratio at a certain position equal to or lower than 30% of the total number of discharge pulses is used as a representative aluminum intensity ratio. Then an alumina intensity ratio (= the alumina fraction x the representative aluminum intensity ratio) is computed using the product of the computed alumina fraction and the representative aluminum intensity ratio, and the amount of alumina (in the steel) may computed using the relational formula between the alumina intensity ratio and the amount of alumina (in the steel) determined by chemical analysis.
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