【摘要】：為了實現(xiàn)鋼鐵等金屬熔煉過程中實時、在線監(jiān)測元素組分含量,設(shè)計了一種遠(yuǎn)程雙脈沖激光誘導(dǎo)擊穿光譜(LIBS)分析系統(tǒng),對遠(yuǎn)距離的樣品進(jìn)行非接觸式遠(yuǎn)程測量、成分分析。首先利用固體標(biāo)準(zhǔn)鋼樣對系統(tǒng)進(jìn)行了測試以及標(biāo)定,為下一步利用此系統(tǒng)在線監(jiān)測熔融鋼液組分含量提供了基礎(chǔ)。實驗結(jié)果表明:激光遠(yuǎn)距離聚焦光斑在1 mm左右;雙脈沖燒蝕比單脈沖燒蝕深度深很多;雙脈沖最佳延時在不同距離下不一致;3.1 m處雙脈沖增強(qiáng)效果比2.1 m處更好,其中Ti(Ⅰ)319.99 nrn增強(qiáng)最顯著為5.19倍;各種元素的標(biāo)定曲線相關(guān)系數(shù)r都在0.99左右,重復(fù)精度(RSD)基本都小于5%,測量偏差(RMSE)都小于0.021%,2.1m處的檢出限相比3.1 m處更低,2.1 m處多數(shù)元素檢出限小于500 ppm。
[Abstract]:In order to realize the real-time and on-line monitoring of element content in the smelting process of iron and steel, a remote double-pulse laser-induced breakdown spectrum (LIBS) analysis system is designed, which can be used for remote non-contact measurement and component analysis of long-distance samples. First, the system was tested and calibrated using solid standard steel samples, which provided the basis for the on-line monitoring of molten steel component content in the next step. The experimental results show that the laser long range focusing spot is about 1 mm, the ablation depth of double pulse is much deeper than that of single pulse, the enhancement effect of double pulse is better than that of 2 1 m at different distance. The Ti (鈪，

本文編號：2213176