原子吸收光谱法测定拉伸断口铬镍钼钛钢样品中主成分  

AAS DETERMINATION OF ALLOYING CONSTITUENTS IN ALLOY STEEL WITH 1-mg SAMPLE TAKEN FROM ITS FRACTURE SURFACE

作　　者：杨强[1] 袁明康[1] 林良栋[1] 刘俊[1] 毕雅敏[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,绵阳621900

出　　处：《理化检验（化学分册）》2002年第2期76-79,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

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 。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.

关 键 词：原子吸收光谱法 铬镍钼钛钢 拉伸断口样品 微波溶样技术 石墨管硅涂层改进技术 成分分析 

分 类 号：TG142.15[一般工业技术—材料科学与工程] TG115.33[金属学及工艺—金属材料]