【摘要】 研究了毫克级铬镍钼钛钢样品中主成分镍的火焰原子吸收光谱法 (FAAS法 )和铬、钼、钒、钛、铝的塞曼恒温平台石墨炉原子吸收光谱法 (ZSTPF AAS法 )。采用了微波溶样技术作为防污染样品预处理技术 ,采用石墨管硅涂层改进技术提高了仪器的测试精度。其中铬、镍、钼、钒、钛、铝的相对标准偏差分别为 2 .7% ,0 .97% ,8.6% ,7.3% ,1.7% ,7.3%。其加标回收率分别为96 5 % ,97% ,96.7% ,93% ,98% ,91%。通过分析 ,发现在较低温度下铬镍钼钛钢断面上有轻微的钼偏析现象 ,可能是拉伸断裂的主要化学影响因素更多还原

【Abstract】 Small amounts of sample on miligram scale are taken from the fracture surface of a Cr Ni Mo Ti alloy steel and its alloy constituents are determined by FAAS (for Ni) and by ZSTPF AAS (for Cr, Mo, V, Ti, Al). In order to prevent pollution in sample dissolution, the sample is dissolved using the microwave technique. The modification of the graphite tube by coating with silicon improves remarkably the precision of the instrument. The RSD′s obtained for these elements (Cr, Ni, Mo, V, Al and Ti) are 2.7%, 0.97%, 8.6%, 7.3%, 1.7% and 7 3%, and their recoveries tested by the standard addition method are 96.5%, 97%, 96.7%, 93%, 98% and 91% respectively. Through a comparative study on the contents of the elements mentioned above determined in samples taken from the fracture surface and from the matrix, it is concluded that the segregation of molybdemun may be the main cause of the pull fracture.更多还原