Method for measuring content of boron in cobalt-base alloy

A cobalt-based alloy and boron content technology, applied in the preparation of test samples, color/spectral characteristic measurement, etc., can solve the problems of long sample dissolution time, long analysis cycle, uncertain analysis line selection, etc., and achieve simple operation, Wide measurement range, saving manpower and material resources

Active Publication Date: 2010-06-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the analysis of boron in the alloy, there is currently no method for accurately analyzing the alloy at home and abroad. The nickel-based superalloy method is basically us

Method used

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  • Method for measuring content of boron in cobalt-base alloy
  • Method for measuring content of boron in cobalt-base alloy
  • Method for measuring content of boron in cobalt-base alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Determination of B content in ZH188 cobalt-based alloy, using inductively coupled plasma emission spectrometer (French JY170), the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; incident power: 1.0Kw; reflected power: <15W; argon Air flow: cooling air flow: 15L / min; sheath air flow: 0.2L / min; incident slit: 20μm; exit slit: 15μm; sample lift: 1.2ml / min; integration time: 2s; elemental analysis line : Boron 182.583nm;

[0039] (1) The instruments used in the determination process are as follows:

[0040] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0041] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0042] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0043] (1.4), cobalt standard solution: 10.0mg / mL; weigh 5.000g; >99.98% metal cobalt is placed in a 250mL beaker, heated and dissolved with 15mL hydrochloric acid (1.1) at low temperature, cooled, transferred to a 500mL volumetric flask,...

Embodiment 2

[0062] Determination of B content in ZH188 cobalt-based alloy, using inductively coupled plasma emission spectrometer (IRISintrepidII, USA), the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; incident power: 1.15Kw; reflected power: <15W; argon Air flow: cooling air flow: 15L / min; auxiliary air flow: 1.0L / min; pump speed: flushing pump speed 150rpm (2.77ml / min); analysis pump speed 120rpm (2.22ml / min); UV integration time: 5s ;Elemental analysis line: boron 182.641nm;

[0063] (1) The instruments used in the determination process are as follows:

[0064] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0065] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0066] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0067] (1.4), cobalt standard solution: 10.0mg / mL; weigh 5.000g; >99.98% metal cobalt is placed in a 250mL beaker, heat and dissolve with 5-15mL hydrochloric acid (1.1) at low temperature, cool...

Embodiment 3

[0084] Determination of B content in GH188 cobalt-based alloy, using inductively coupled plasma emission spectrometer (France JY170), the working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz; incident power: 1.0Kw; reflected power: <15W; argon Air flow: cooling air flow: 15L / min; sheath air flow: 0.2L / min; incident slit: 20μm; exit slit: 15μm; sample lift: 1.2ml / min; integration time: 2s; elemental analysis line : Boron 182.583nm;

[0085] (1) The instruments used in the determination process are as follows:

[0086] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0087] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0088] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0089] (1.4), cobalt standard solution: 10.0mg / mL; weigh 5.000g; >99.98% metal cobalt is placed in a 250mL beaker, heated and dissolved with 15mL hydrochloric acid (1.1) at low temperature, cooled, transferred to a 500mL volumetric flask,...

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Abstract

The invention belongs to a technique for analyzing trace elements of an alloy, and relates to a method for measuring the content of boron in a cobalt-base alloy. By adopting an inductively coupled plasma emission spectrometer and treating a sample of the cobalt-base alloy in particular a high-tungsten sample by using 20mL of hydrochloric acid, nitric acid and hydrofluoric acid, the method solves the puzzling problems that the past dissolved sample has large reagent dosage and high reagent blank and cannot be measured normally by an instrument; by performing interference experiments and spectrogram analyses, the method finds the optimal analytical line, overcomes the interferences caused by a plurality of elements such as major elements of cobalt, chromium, tungsten and the like in the cobalt-base alloy, and improves the measuring accuracy; the method has wide measuring ranges, the measuring lower limit is 0.002 percent, and the measuring upper limit is 0.20 percent and is 101 times of the measuring lower limit; and the method can perform measurement quickly, is simple and convenient to operate, and saves a large quantity of manpower and material resources.

Description

technical field [0001] The invention belongs to alloy trace element analysis technology, and relates to a method for measuring boron content in cobalt-based alloys. Background technique [0002] At present, there is no detection method standard for the analysis of the composition of cobalt-based superalloys at home and abroad. The methods used in the current work of many testing centers are based on the method standards of nickel-based superalloys. Due to the special structure of cobalt-based superalloys, its The sample dissolution time is much longer than that of other common superalloys, and if the sample dissolution method of nickel-based and iron-based superalloys is simply applied, there will often be incomplete dissolution of cobalt-based superalloy samples. [0003] The control of boron in cobalt-based superalloys is very strict. The measurement limit of B element is 0.005%, and the measurement limit is 0.20%. Therefore, accurate analysis of boron content in the alloy...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/38
Inventor 叶晓英高颂杨春晟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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