A Quantitative Analysis Method of Niobium Phase in Steel
A quantitative analysis and content technology, applied in the field of rapid determination of solid solution niobium, niobium nitride, niobium carbide content in steel samples, and rapid quantitative analysis of niobium phase in steel, which can solve the problems of slow analysis speed and cumbersome chemical analysis operations. , to achieve the effects of high accuracy and precision, solving cumbersome operations and eliminating matrix effects
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Embodiment 1
[0027] Accurately weigh 0.5000g chip-shaped X80 steel sample, place it in a 250mL conical flask, add 100mL6% iodine-ethanol-acetone (volume ratio 1:1), put it into an ultrasonic cleaner at room temperature and dissolve it quickly with ultrasonic waves ; Circulating cooling water is introduced into the ultrasonic equipment to ensure that the sample dissolves at room temperature.
[0028] Filter the residue with double-layer slow quantitative filter paper and wash with ethanol. Take the filtrate and evaporate it to dryness in a water bath, add 15mL of nitric acid, 5mL of perchloric acid and heat until it becomes transparent. For the determination of solid solution niobium;
[0029] Transfer the above filtered residue and filter paper into a 250mL beaker, add 20mL of sodium hydroxide with a mass concentration of 20%, heat in a boiling water bath for 1h, and after decomposing niobium nitride in the residue, add 1-2 drops with a mass fraction of 1% For phenolphthalein, add 1+1 hy...
Embodiment 2
[0036] Accurately weigh 0.3000g chip-shaped Q370 steel sample, place it in a 250mL conical flask, add 50mL 3% bromine-methanol, put it in an ultrasonic cleaning machine at room temperature and dissolve it quickly with ultrasonic waves; water to ensure that the sample dissolves at room temperature.
[0037] Filter the residue with double-layer slow quantitative filter paper and wash with methanol. Take the filtrate and evaporate it to dryness in a water bath, add 20mL of nitric acid, 3mL of perchloric acid and heat until it becomes transparent. For the determination of solid solution niobium;
[0038] Transfer the above filtered residue and filter paper into a 250mL beaker, add 50mL of sodium hydroxide with a mass concentration of 10%, heat in a boiling water bath for 40min, and after decomposing the niobium nitride in the residue, add dropwise 1 to 2 drops with a mass fraction of 1 % phenolphthalein, add concentrated hydrochloric acid dropwise until the solution is colorless...
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