Method for detecting zirconium content in tantalum-cobalt-base alloy in microwave solution sample dissolving manner
A technology of microwave digestion and cobalt-based alloys, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problems of unsuitable cobalt-based alloy dissolution and measurement, easy formation of precipitates, large spectral interference, etc. problems, to achieve the effects of fast measurement, improved accuracy, and saving manpower and material resources
Inactive Publication Date: 2013-01-16
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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[0005] However, at present, there is no analysis method for tantalum-cobalt-based superalloys in China. Ordinary cobalt-based superalloys are dissolved with hydrochloric acid and nitric acid. Alloys are difficult to dissolve due to the presence of high tantalum, and if there is phosphoric acid in the system when zirconium dissolves, it will easily form precipitates. Due to the presence of high tantalum, the spectrum interference is relatively large, so it is necessary to treat tantalum-cobalt-based alloys. Research on problems such as sample dissolution and spectral interference
Gao Song et al. applied for a patent in 2009 "A Method for Measuring the Contents of Aluminum, Titanium, Manganese, Nickel, Tungsten and Iron in CoCrMo Cobalt-Based Alloys". It is not applicable to the dissolution and measurement of cobalt-based alloys after adding high melting point element tantalum
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[0044] Determination of zirconium content in tantalum-cobalt-based superalloy K6509 is characterized in that: the steps of the determination method are:
[0045] (1) The reagents used in the determination process of this method are:
[0046] 1.1 Hydrochloric acid, ρ1.19g / mL, superior grade or MOS grade;
[0047] 1.2 Nitric acid, ρ1.42g / mL;, excellent grade pure or MOS grade
[0048] 1.3 Hydrofluoric acid, ρ1.15g / mL, superior grade;
[0049] 1.4 Sulfuric acid, ρ1.84g / mL, superior grade;
[0050] 1.5 Zirconium standard solution, 0.10mg / mL, the preparation method is to weigh 0.1351g of zirconium dioxide, put it in a platinum crucible, add 10mL of hydrofluoric acid in the above step 1.3 and 6mL of nitric acid in the above step 1.2, and dissolve it by heating at low temperature , add 10mL of sulfuric acid in the above step 1.4, heat and evaporate to sulfuric acid fumes, add water and mix the solution carefully, after cooling, transfer the solution into a 1000mL volumetric flask,...
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The invention provides a method for detecting the zirconium content in tantalum-cobalt-base alloy in a microwave solution sample dissolving manner. The method comprises the analyzing steps of: weighing a sample; preparing a sample solution; preparing a calibration solution; drawing a working curve; measuring the concentration of zirconium in the sample solution; and calculating a measurement result, so as to obtain the zirconium content. The problems that the sample is difficult to dissolve, a measurement spectral line is interfered seriously and the like can be overcome, so that the sample dissolving speed is greatly accelerated; the spectral interference of a base body on measurement elements can be avoided by base body matching; and the accuracy of the measurement is improved. The method has the advantages of rapid sample solution and measurement, simplicity and convenience in operation, and good labor and material saving performance.
Description
technical field [0001] The invention is [0002] The invention belongs to an alloy element analysis technology, and relates to a method for determining the zirconium content in a tantalum-cobalt-based alloy by a microwave digestion and dissolution method. Background technique [0003] The tantalum-cobalt-based superalloy K6509 is a Co-Cr-Ni-based precipitation hardening equiaxed crystal casting superalloy, and the service temperature is below 1000 °C. The Cr content in the alloy accounts for about 23%, and elements that form carbides such as tantalum, tungsten, and titanium are added at the same time, so the alloy has excellent oxidation resistance and corrosion resistance, and high high-temperature strength. The X40 alloy is 40MPa~50MPa higher, and the temperature bearing capacity is increased by 40℃~50℃. The main product is the guide vane. The alloy has been used to make hot end parts such as the guide vane of the gas turbine engine working below 1000℃. It is recommended ...
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IPC IPC(8): G01N21/71G01N1/44
Inventor 庞晓辉高颂杨春晟房丽娜张艳
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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