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为了在脱气过程中快速精确地测定钢液中的氢含量,日本钢公司开发了几种在线分析方法。1.EB-MS 法:这种方法是从钢液中取得小试样,然后用电子束照射熔化试样,用质谱仪测定氢含量。测定程序由计算机自动进行。试样首先进入预真空的取样孔,然后送入真空室(10~(-6)托)。在真空室内用电子束照射(EB),局部熔化的钢样放出的氢气和氮气,由四极质谱仪进行测定。在110秒内测定出氢气和氮气,在平均2ppm 氢和300ppm氮时,误差为±5%。如果电子束的电流和电压恒定,则试样熔化区域的体积不变。因
In order to quickly and accurately determine the hydrogen content of molten steel during degassing, Japanese steel companies have developed several online analytical methods. 1. EB-MS method: This method is to obtain a small sample from the molten steel, and then electron beam irradiation to melt the sample, the mass spectrometer hydrogen content. Measurement procedures automatically by the computer. First sample into the pre-vacuum sampling hole, and then into the vacuum chamber (10 ~ (-6) care). Electron beam irradiation (EB) in a vacuum chamber, hydrogen and nitrogen evolved from a locally melted steel sample were performed by a quadrupole mass spectrometer. Hydrogen and nitrogen were measured in 110 seconds with an error of ± 5% with an average of 2 ppm hydrogen and 300 ppm nitrogen. If the current and voltage of the electron beam are constant, the volume of the sample melting area does not change. because