The invention relates to an observation method for niobium and hafnium alloy metallographic structure, which is characterized in that the method includes the following steps :(1) the observation surface of niobium and hafnium alloy sample is machined into a plane, and then ground on the metallographic grinding machine. (2) dip niobium and hafnium alloy samples washed out of the sand in step (1) into the polishing solution for chemical polishing, and then rinse with clean water; The polishing solution is a mixture of H2SO4, HNO3 and HF mixed at a volume ratio of 5:1 ~ 2:1 ~ 2. The H2S04, HNO3 and HF are pure analytical reagents. (3) the niobium and hafnium alloy samples after chemical polishing in step O were placed in the polishing machine. The niobium and hafnium alloy samples were mechanically polished with Cr2O3 solution and 2. 5 m diamond powder. The corrosion solution is a mixture of H2S04, HNO3, > HF and H2O mixed at a volume ratio of 2:1 ~ 2:1 ~ 2:8 ~ 10. The H2S04, HNO3 and HF are analytical pure reagents.
Is niobium hafnium alloy of each element in the analysis of the current by using chemical analysis, cumbersome procedures, cycle is long, time consuming. In order to meet the needs of production, with X ray fluorescence spectrometry in the alloy tungsten, tantalum, hafnium, titanium, zirconium, this paper analyzed the elements of the experiment, the precision and accuracy can meet the requirement analysis, and the method is simple, accurate and practical. 1 test section 1.1 test conditions and test principle with Siemens SRS300 type X-ray fluorescence spectrometer, the window of rhodium target X ray tube, vacuum light path. In order to eliminate the irregularity of the sample.
