CAJ | 학술논문

激光诱导击穿光谱（L IB S ）技术是应用于冶金在线分析最具前景的技术之一。为了研究真空和高温条件下L IBS光谱特性和物质成分定量分析方法，设计并搭建了可实现真空环境高温熔融金属L IBS光谱测量的实验系统。系统以调Q Nd：YAG脉冲激光器为光源，采用不同焦距透镜实现激光聚焦和信号光采集，并利用光谱仪进行光谱检测，真空获取和高温加热通过真空泵和中频感应电炉实现，感应加热线圈通过陶瓷封接引线法兰与真空系统进行整合。经过安装测试，搭建系统在未加热情况下真空度可达1×10-4Pa ，加热温度可达到1600℃，可实现真空环境下铁、铝等金属加热或熔融，并获得相应环境下的LIBS测量光谱。利用该系统进行真空和熔融条件下标准钢样品的L IBS实验，得到了固态钢样品L IBS光谱在不同真空度下的光谱对比，以及真空环境熔融态和固态钢样品光谱对比。通过对测得的L IBS光谱进行数据处理和理论分析，所得初步实验结果与现有研究结论相符合，表明该系统工作状况良好，可满足真空环境下的熔融金属成分分析研究的基本需求。
격광유도격천광보（L IB S ）기술시응용우야금재선분석최구전경적기술지일。위료연구진공화고온조건하L IBS광보특성화물질성분정량분석방법，설계병탑건료가실현진공배경고온용융금속L IBS광보측량적실험계통。계통이조Q Nd：YAG맥충격광기위광원，채용불동초거투경실현격광취초화신호광채집，병이용광보의진행광보검측，진공획취화고온가열통과진공빙화중빈감응전로실현，감응가열선권통과도자봉접인선법란여진공계통진행정합。경과안장측시，탑건계통재미가열정황하진공도가체1×10-4Pa ，가열온도가체도1600℃，가실현진공배경하철、려등금속가열혹용융，병획득상응배경하적LIBS측량광보。이용해계통진행진공화용융조건하표준강양품적L IBS실험，득도료고태강양품L IBS광보재불동진공도하적광보대비，이급진공배경용융태화고태강양품광보대비。통과대측득적L IBS광보진행수거처리화이론분석，소득초보실험결과여현유연구결론상부합，표명해계통공작상황량호，가만족진공배경하적용융금속성분분석연구적기본수구。
Laser-induced breakdown spectroscopy (LIBS) is one of the most promising technologies to be applied to metallurgical composition online monitoring in these days .In order to study the spectral characters of LIBS spectrum and to investigate the quantitative analysis method of material composition under vacuum and high temperature environment ,a LIBS measurement sys-tem was designed and set up which can be used for conducting experiments with high-temperature or molten samples in different vacuum environment .The system co nsists of a Q-switched Nd∶YAG laser used as the light source ,lens with different focus lengths used for laser focusing and spectrum signal collecting ,a spectrometer used for detecting the signal of LIBS spectrums , and a vacuum system for holding and heating the samples while supplying a vacuum environment .The vacuum was achieved and maintained by a vacuum pump and an electric induction furnace was used for heating the system .The induction coil was integrat-ed to the vacuum system by attaching to a ceramic sealing flange .The system was installed and testified ,and the results indicate that the vacuum of the system can reach 1 × 10-4 Pa without heating ,while the heating temperature could be about 1 600 ℃ ,the system can be used for melting metal samples such as steel and aluminum and get the LIBS spectrum of the samples at the same time .Utilizing this system ,LIBS experiments were conducted using standard steel samples under different vacuum or high-tem-perature conditions .Results of comparison between LIBS spectrums of solid steel samples under different vacuum were achieved , and so are the spectrums of molten and solid steel samples under vacuum environment .Through data processing and theoretical analyzing of these spectrums ,the initial results of those experiments are in good agreement with the results that are presently re-ported ,which indicates that the whole system functions well and is available for molten metal LIBS experiment under vacuum en-vironment .