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Method for detecting content of carbon and sulfur in spring

A technology of sulfur content and solution, which is used in measurement devices, preparation and sampling of samples for testing, etc., can solve problems such as the inability to remove the anti-corrosion protective layer, the inability to completely straighten the spring, and the inaccurate test results, and achieve stable and accurate test results. , Prevent metal passivation and improve detection efficiency

Pending Publication Date: 2021-11-23
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, due to the existence of the anti-corrosion protection layer, especially the carbon and sulfur contained in it, the test results are inaccurate
[0006] For the anti-corrosion protection layer, most of the existing technologies remove it by sanding, but because the spring cannot be completely straightened, there are many parts that cannot be ground during grinding, and the anti-corrosion protection layer in these parts cannot be removed; If it is too deep for a long time, the fine ore in the sandpaper or abrasive belt will be embedded in the sample, causing pollution to the sample and affecting the test results

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for detecting carbon and sulfur content in springs, comprising the following steps:

[0046] S1. Configure an acid etching solution; the acid etching solution is configured from hydrochloric acid, nitric acid, absolute ethanol, acetone, and deionized water according to a volume ratio of 15:8:15:25:35, and the concentration of the hydrochloric acid is 38wt%. Nitric acid concentration is 65wt%

[0047] S2. Place the spring in a beaker filled with the above-mentioned acid etching solution, and perform heat treatment, the heating temperature is 60°C, and the time is 30min;

[0048] S3, take out the spring after heat treatment, after cleaning with deionized water, use vise to straighten the spring, after polishing with 100# sandpaper, cut into 0.5cm long segment;

[0049] S4. Place the spring segment in an ultrasonic cleaning solution and perform ultrasonic vibration treatment for 28 minutes. The ultrasonic cleaning solution is composed of hydrochloric acid, nitric...

Embodiment 2

[0062] A method for detecting carbon and sulfur content in a spring, the detected spring is the same batch as Example 1, comprising the following steps:

[0063] S1. Configure an acid etching solution; the acid etching solution is configured from hydrochloric acid, nitric acid, absolute ethanol, acetone, and deionized water according to a volume ratio of 10:10:20:20:55, and the concentration of the hydrochloric acid is 40wt%. The concentration of nitric acid is 63wt%

[0064] S2. Place the spring in a beaker filled with the above-mentioned acid etching solution, and perform heat treatment, the heating temperature is 65°C, and the time is 25min;

[0065] S3, take out the spring after heat treatment, after cleaning with deionized water, use vise to straighten the spring, after polishing with 100# sandpaper, cut into 0.5cm long segment;

[0066] S4. Place the spring segment in an ultrasonic cleaning solution and perform ultrasonic vibration treatment for 25 minutes. The ultrason...

Embodiment 3

[0070] A method for detecting carbon and sulfur content in a spring, the detected spring is the same batch as Example 1, comprising the following steps:

[0071] S1. Configure an acid etching solution; the acid etching solution is configured from hydrochloric acid, nitric acid, absolute ethanol, acetone, and deionized water according to a volume ratio of 20:5:10:30:20, and the concentration of the hydrochloric acid is 36wt%. The concentration of nitric acid is 67wt%

[0072] S2. Place the spring in a beaker filled with the above-mentioned acid etching solution, and heat it at a temperature of 55°C for 35 minutes;

[0073] S3, take out the spring after heat treatment, after cleaning with deionized water, use vise to straighten the spring, after polishing with 100# sandpaper, cut into 0.5cm long segment;

[0074] S4. Place the spring segment in an ultrasonic cleaning solution and perform ultrasonic vibration treatment for 30 minutes. The ultrasonic cleaning solution is composed...

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Abstract

The invention discloses a method for detecting the content of carbon and sulfur in a spring. The method comprises the following steps: S1, preparing an acid etching solution from hydrochloric acid, nitric acid, absolute ethyl alcohol, acetone and deionized water according to a certain proportion; s2, placing the spring in a container containing the acid etching solution to be subjected to heating treatment; s3, taking out the spring obtained after heating treatment, after cleaning treatment is conducted, straightening, polishing and shearing the spring, and obtaining spring sections; s4, placing the spring sections in an ultrasonic cleaning solution to be subjected to ultrasonic oscillation treatment; s5, washing the spring sections subjected to the ultrasonic oscillation treatment, and then drying the spring sections; and S6, taking the dried spring sections, and detecting the content of carbon and sulfur. The method can fully and effectively remove the anti-corrosion protection layer on the surface of the spring, meets the detection requirements, and is stable and accurate in detection result.

Description

technical field [0001] The application relates to the technical field of metallurgical analysis, in particular, to a method for detecting the carbon and sulfur content in a spring. Background technique [0002] Spring steel is a steel specially used to manufacture springs and elastic elements. The elasticity depends on its ability to deform elastically, that is, within the specified range, the ability to deform elastically makes it withstand a certain load without permanent deformation after the load is removed. . Since the spring needs to be used under shock, vibration or long-term stress, the spring steel is required to have high tensile strength, elastic limit, and high fatigue strength. Among them, in terms of technology, the spring steel is required to have a certain hardenability and Decarburization, good surface quality, etc., in terms of composition, the carbon and sulfur content in spring steel are required to be within the specified range, that is, the carbon and ...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N1/32G01N1/44G01N1/34G01N1/28
CPCG01N21/3563G01N1/32G01N1/44G01N1/34G01N1/286G01N1/28G01N2001/2873G01N2021/3572
Inventor 胡乐明邢文青郝志奎黄合生黄波吴红兵吴超超梁小红尚聪亚
Owner SGIS SONGSHAN CO LTD