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Determination method for calcium, cobalt, chromium and iron in tungsten carbide

A technology of iron element and tungsten carbide, which is applied in the field of determination of cobalt, chromium, calcium and iron elements in tungsten carbide, can solve the problems of long analysis period, unstable sample dissolution, uncertain selection of analysis line, etc. The method is accurate and reliable, and the effect of saving manpower and material resources

Inactive Publication Date: 2013-08-21
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is also no applicable analysis method for calcium, cobalt, chromium, and iron elements in tungsten carbide. Applying the analysis method of nickel-based superalloy and medium-low alloy steel, there are problems of unstable dissolved samples and uncertain selection of analysis lines, which lead to Analysis period is long

Method used

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  • Determination method for calcium, cobalt, chromium and iron in tungsten carbide
  • Determination method for calcium, cobalt, chromium and iron in tungsten carbide
  • Determination method for calcium, cobalt, chromium and iron in tungsten carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]To measure the content of calcium, cobalt, chromium and iron elements in WC-10Co4Cr, an inductively coupled plasma emission spectrometer (French JY170) is used. Among them, the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; incident power: 1.0Kw; reflected power: <15W; cooling air flow: 12L / min; sheath air flow: 0.2L / min; sample lift: 1.0ml / min; integration time: 2s; Co: 228.616nm; Cr: 267.716nm; Fe: 259.940nm; Y371.029nm.

[0046] The reagents used in the determination process are as follows:

[0047] Hydrochloric acid, density 1.19g / mL, superior grade;

[0048] Nitric acid, density 1.42g / mL, superior grade;

[0049] Sulfuric acid I, density 1.84g / mL, superior grade;

[0050] Sulfuric acid II, 1+1, sulfuric acid I and water are mixed in a volume ratio of 1:1;

[0051] Phosphoric acid, density 1.69g / mL, superior grade;

[0052] Calcium standard solution A: the mass-volume concentration is 0.10 mg / mL. The p...

Embodiment 2

[0079] To measure the content of calcium, cobalt, chromium and iron elements in WC-Co10-Cr4, an inductively coupled plasma emission spectrometer (French JY170) is used. Among them, the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; Power: 0.95Kw; reflected power: <15W; cooling air flow: 15L / min; sheath air flow: 0.4L / min; sample lift: 1.2ml / min; integration time: 5s; nm; Co:228.616nm; Cr:267.716nm; Fe:259.940nm; Y371.029nm;

[0080] The reagents used in the assay process are as follows:

[0081] Hydrochloric acid, density 1.19g / mL, high purity;

[0082] Nitric acid, density 1.42g / mL, high purity;

[0083] Sulfuric acid I, density 1.84g / mL, high purity;

[0084] Sulfuric acid II, 1+1, sulfuric acid I and water are mixed in a volume ratio of 1:1;

[0085] Phosphoric acid, density 1.69g / mL, high purity;

[0086] Calcium standard solution A: the mass-volume concentration is 0.10 mg / mL. The preparation method is to w...

Embodiment 3

[0113] To measure the content of calcium, cobalt, chromium and iron elements in WC-10Co4Cr, an inductively coupled plasma emission spectrometer (French JY170) is used. Among them, the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; incident power: 0.98Kw; reflected power: <15W; cooling air flow: 20L / min; sheath air flow: 0.6L / min; sample lift: 1.5ml / min; integration time: 8s; Co:228.616nm; Cr:267.716nm; Fe:259.940nm; Internal standard analysis line: Y371.029nm;

[0114] The reagents used in the assay process are as follows:

[0115] Hydrochloric acid, density 1.19g / mL, MOS grade;

[0116] Nitric acid, density 1.42g / mL, MOS grade;

[0117] Sulfuric acid I, density 1.84g / mL, MOS grade;

[0118] Sulfuric acid II, 1+1, sulfuric acid I and water are mixed in a volume ratio of 1:1;

[0119] Phosphoric acid, density 1.69g / mL, MOS grade;

[0120] Calcium standard solution A: the mass-volume concentration is 0.10 mg / mL. T...

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Abstract

The invention provides a determination method for calcium, cobalt, chromium and iron in tungsten carbide. The method employs inductively coupled plasma atomic emission spectrometry for determination of the content of calcium, cobalt, chromium and iron in tungsten carbide, and analytical ranges are as follows: Ca 0.005 to 2%, Co 1 to 15%, Cr 1 to 15% and Fe 0.005 to 10%. According to the invention, a tungsten carbide sample can be effectively dissolved, so the problem of difficult dissolution of the sample is overcome and a sample dissolution speed is accelerated; an optimal analytical line is found through interference experiments and spectrum analysis, interference among spectral lines is eliminated, accurate and reliable determination of the content of calcium, cobalt, chromium and iron in tungsten carbide is realized, and requirements of scientific research and production are met; and the method has the advantages of rapid measurement, easy and convenient operation and conservation of considerable manpower and material resources.

Description

technical field [0001] The invention relates to a method for determining calcium, cobalt, chromium and iron elements in tungsten carbide, belonging to the technical field of alloy element analysis. Background technique [0002] At present, there is no detection method standard for the analysis of the composition of tungsten carbide at home and abroad. The methods used in the current work are all based on the method standards of nickel-based superalloys or medium and low alloy steels. Due to the special structure of tungsten carbide, its dissolution The method is different from other ordinary nickel-based superalloys and low-medium alloy steels, and if the sample dissolution method of nickel-based superalloys or low-alloy steels is simply applied, the phenomenon of incomplete dissolution of tungsten carbide samples often exists. Secondly, the analysis line The choice of is uncertain, if you choose an analysis line with interference, it will affect the reliability of the measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
Inventor 任慧叶晓英杨春晟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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