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Method for detecting contents of titanium, manganese, Ferrum, nickel and tungsten in tantalum contained cobalt-base alloy

A technology of cobalt-based alloys and volumetric flasks is applied in the field of alloy element analysis, which can solve the problems of poor analysis results, interference of elements to be measured, and long analysis cycles, and achieves the advantages of simple operation, improved accuracy, and saving of manpower and material resources. Effect

Inactive Publication Date: 2013-02-06
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

[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 the elements to be measured are severely interfered by tantalum, resulting in long analysis periods and poor accuracy of analysis results.

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  • Method for detecting contents of titanium, manganese, Ferrum, nickel and tungsten in tantalum contained cobalt-base alloy
  • Method for detecting contents of titanium, manganese, Ferrum, nickel and tungsten in tantalum contained cobalt-base alloy
  • Method for detecting contents of titanium, manganese, Ferrum, nickel and tungsten in tantalum contained cobalt-base alloy

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Embodiment

[0057] The method for determining the content of titanium, manganese, iron, nickel and tungsten in tantalum-cobalt-based alloys is characterized in that:

[0058] (1) The reagents used in the determination process of this method are:

[0059] 1.1 Hydrochloric acid, ρ1.19g / mL, superior grade or MOS grade;

[0060] 1.2 Nitric acid, ρ1.42g / mL, superior grade or MOS grade;

[0061] 1.3 Sulfuric acid, ρ about 1.84g / mL, superior grade or MOS grade;

[0062] 1.4 Phosphoric acid, ρ about 1.69g / mL, superior grade or MOS grade;

[0063] 1.5 hydrofluoric acid, ρ about 1.15g / mL, superior grade or MOS grade;

[0064] 1.6 Sulfuric acid, 1+1, superior grade;

[0065] 1.7 Sodium hydroxide solution, 200g / L, the preparation method is to weigh 200g of high-grade pure sodium hydroxide and place it in a 500mL beaker. After the solution is completely dissolved, transfer it into a 1000mL volumetric flask, dilute with water to the mark, and mix well;

[0066] 1.8 Ammonium pyrosulfate, solid;

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Abstract

The invention provides a method for detecting contents of titanium, manganese, ferrum, nickel and tungsten in a tantalum contained cobalt-base alloy. The analyzing steps are as follows: weighing a specimen; preparing a specimen solution; preparing a correcting solution; drawing a working curve; measuring concentrations of titanium, manganese, ferrum, nickel and tungsten in the specimen solution; and calculating measuring results so as to obtain the contents of titanium, manganese, ferrum, nickel and tungsten. According to the invention, problems that a sample is hard to dissolve, serious interference on spectral line measurement is caused and so on are overcome; the sample dissolving speed is greatly increased; spectral interferences of a matrix on measuring elements are eliminated through matrix matching; and the measuring accuracy is enhanced. The method for detecting the contents of titanium, manganese, ferrum, nickel and tungsten in the tantalum contained cobalt-base alloy, provided by the invention, has the advantages of speediness in sample dissolution and and measurement as well as simplicity and convenience in operation; and a great deal of manpower and material resources are saved.

Description

technical field [0001] The invention relates to a method for measuring the content of titanium, manganese, iron, nickel and tungsten in a tantalum-cobalt-based alloy, belonging to the technical field of alloy element analysis. Background technique [0002] 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, as well as high high temperature strength. The durable strength of the alloy at 900°C is 40MPa-50MPa higher than that of the similar X40 alloy, and the temperature-bearing capacity is increased by 40°C-50°C. The main product is the guide vane, and the alloy has been used to make hot-end parts such as the guide vane of the gas turbin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/66G01N1/38G01N1/44
Inventor 高颂庞晓辉杨春晟杨峥高帅
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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