Abstract：The feasibility of inert gas fusion-infrared absorption determination of high content oxygen in flux-cored wire (FCW) powder was investigated and the optimal working conditions of oxygen/nitrogen/hydrogen analyzer were established. It was found that, satisfactory results could be obtained with 20-60 mg of sample, 0.3-0.5 g of pure iron as flux and a potassium dichromate-calibrated analyzer operating at analysis powder of 5.5 kW under manual sample loading-intermittent heating mode. When the method was applied to the determination of oxygen in flux-cored powders actual samples, the results were accordant with those obtained by subtraction method with the relative standard deviation (RSD,n=5-7)less than 5.5% and the standard addition recovery of 90%-103%.
刘攀,杜丽丽,聂富强. 惰气熔融-红外吸收法测定药芯焊丝药粉中高含量氧[J]. 冶金分析, 2014, 34(9): 53-57.
LIU Pan, DU Li-li, NIE Fu-qiang. Determination of high content oxygen in flux-cored powders by inert gas fusion-infrared absorption method. , 2014, 34(9): 53-57.
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