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Method for detecting components of cobalt alloy powder

A composition detection and detection method technology, which is applied in the field of physical and chemical detection, can solve the problems of incomplete dissolution of cobalt-based alloy samples and large errors in test results, and achieve the effects of small errors, reduced errors, and fewer steps

Inactive Publication Date: 2019-04-09
NANTONG JINYUAN INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when using atomic absorption spectrometer to detect the content of alloy elements, for cobalt-based superalloy powder, nitric acid and hydrochloric acid are generally used to dissolve the sample. This method cannot completely dissolve the cobalt-based alloy sample, resulting in large errors in the detection results.

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  • Method for detecting components of cobalt alloy powder

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Embodiment 1

[0043] A method for detecting the composition of cobalt alloy powder, wherein the cobalt alloy powder includes cobalt, chromium, aluminum, molybdenum and carbon chemical components, and the detection method comprises the following process steps:

[0044] 1) Put the test to be tested in a vacuum oven at 90°C for 1.5 hours;

[0045] 2) Take quantitative sample, add digestion solution, digestion solution comprises nitric acid, phosphoric acid and perchloric acid, wherein the volume ratio of nitric acid and phosphoric acid is 3:1, the volume ratio of perchloric acid and nitric acid is 2:1, in microwave Dissolve the sample in the digester to make the solution to be tested; set the temperature of the microwave digester at 140°C for 20 minutes;

[0046] 3) Dissolve cobalt, chromium, aluminum, molybdenum and carbon with an acid solution, the acid solution is a mixed aqueous solution of hydrochloric acid, sulfuric acid and citric acid, the volume ratio of hydrochloric acid and sulfuric...

Embodiment 2

[0051] A method for detecting the composition of cobalt alloy powder. The cobalt alloy powder includes cobalt, chromium, aluminum, molybdenum and carbon chemical components. The detection method includes the following process steps:

[0052] 1) Dry the test to be tested in a vacuum oven at 100°C for 1.5 hours;

[0053] 2) Take quantitative sample, add digestion solution, digestion solution comprises nitric acid, phosphoric acid and perchloric acid, wherein the volume ratio of nitric acid and phosphoric acid is 4:1, the volume ratio of perchloric acid and nitric acid is 3:1, in microwave Dissolve the sample in the digester, and set the temperature of the microwave digester at 150°C for 30 minutes to prepare the solution to be tested;

[0054]3) Dissolve cobalt, chromium, aluminum, molybdenum and carbon with an acid solution, the acid solution is a mixed aqueous solution of hydrochloric acid, sulfuric acid and citric acid, the volume ratio of hydrochloric acid and sulfuric acid ...

Embodiment 3

[0059] A method for detecting the composition of cobalt alloy powder. The cobalt alloy powder includes cobalt, chromium, aluminum, molybdenum and carbon chemical components. The detection method includes the following process steps:

[0060] 1) Put the test to be tested in a vacuum oven at 120°C and dry for 1.5 hours;

[0061] 2) Take quantitative sample, add digestion solution, digestion solution comprises nitric acid, phosphoric acid and perchloric acid, the volume ratio of nitric acid and phosphoric acid is 5:1; The volume ratio of perchloric acid and nitric acid is 4:1; Dissolve the sample in the microwave digester, set the temperature at 160°C for 40 minutes in the microwave digester, and make the solution to be tested;

[0062] 3) Dissolve cobalt, chromium, aluminum, molybdenum and carbon with an acid solution, the acid solution is a mixed aqueous solution of hydrochloric acid, sulfuric acid and citric acid, the volume ratio of hydrochloric acid and sulfuric acid is 6:1,...

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Abstract

The invention discloses a method for detecting components of cobalt alloy powder. The cobalt alloy powder contains the chemical components including cobalt, chromium, aluminum, molybdenum and carbon.The method comprises the steps: 1) drying a to-be-detected sample in a vacuum oven; 2) weighing a certain amount of the sample, adding a digestion liquid, and dissolving the sample in a microwave digester to prepare a to-be-detected solution; 3) dissolving cobalt, chromium, aluminum, molybdenum and carbon in an acid solution to make a working curve; 4) measuring the absorbance value of the to-be-detected solution; and 5) measuring the contents of cobalt, chromium, aluminum, molybdenum and carbon in the to-be-detected solution, and then calculating to obtain the contents of cobalt, chromium, aluminum, molybdenum and carbon in the sample. The method for detecting the components of the cobalt alloy powder has the advantages of less steps and simplicity, can reduce the error generated in the intermediate links, and can effectively reduce the uncertainty of the detection result; and nitric acid, phosphoric acid and perchloric acid are used as the digestion liquid, and through reasonable compatibility, the cobalt-cobalt alloy powder digesting effect is good, and the cobalt alloy powder is completely dissolved.

Description

technical field [0001] The invention relates to the technical field of physical and chemical detection, in particular to a method for detecting the composition of cobalt alloy powder. Background technique [0002] Cobalt-based superalloys have excellent thermal corrosion resistance, oxidation resistance and thermal fatigue resistance, and are widely used in aerospace engines, ground gas turbines and other key equipment serving in harsh environments. Since cobalt alloy materials do not contain toxic elements, they have Good oxidation resistance, corrosion resistance and processability are also some attempts in dental materials for stomatology. [0003] An atomic absorption spectrometer generally consists of four major parts, namely a light source, a flame atomizer, a monochromator and a data processing system. There are many kinds of flames. At present, the air-acetylene flame is commonly used. The temperature of atomization is between 2100 ° C and 2400 ° C, and the latter i...

Claims

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Application Information

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IPC IPC(8): G01N21/72
CPCG01N21/72
Inventor 姜勇梁廷禹
Owner NANTONG JINYUAN INTELLIGENT TECH CO LTD