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Sample preparation verification method and sample preparation method

A verification method and sample technology, applied in sampling, preparation of test samples, fluorescence/phosphorescence, etc., to achieve the effect of improving precision, eliminating major uncertain factors, and improving quality assurance level

Inactive Publication Date: 2020-07-07
SAIC GENERAL MOTORS
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Problems solved by technology

[0004] The purpose of the present invention is to solve or at least alleviate the problems existing in the prior art

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  • Sample preparation verification method and sample preparation method
  • Sample preparation verification method and sample preparation method
  • Sample preparation verification method and sample preparation method

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Embodiment Construction

[0026] It is easy to understand that, according to the technical solution of the present invention, those skilled in the art can propose multiple structural modes and implementation modes that can be replaced without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom that are mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings, and they are It is a relative concept, so it may change accordingly according to its different positions and different usage states. Accordingly, these or other directional terms should not be...

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Abstract

The invention provides a sample preparation verification method and a sample preparation method. The sample preparation verification method is used for a test for determining components of spheroidized molten iron by spark discharge atomic emission spectrometry, and comprises the following steps: sampling from molten iron of a cast iron product, and preparing a plurality of samples; dividing the samples into a plurality of groups, wherein each group of samples comprises a plurality of samples; grinding each group of samples according to different sample grinding conditions; comparing and counting detection results of the spectrograph and the carbon sulfur instrument on C and S components in each group of samples; comparing metallographic phases of each group of samples; and determining theoptimal sample grinding condition based on the difference of C and S component detection results of the spectrograph and the carbon-sulfur analyzer and the structure uniformity in the metallographicphase. According to the method disclosed by the invention, the technical problem that a detection result has relatively large discreteness when an emission spectrometer is used for analyzing the ductile iron carbon element is solved, and the precision of determining the components of the nodulized molten iron by spark discharge atomic emission spectroscopy is improved.

Description

technical field [0001] The invention relates to the field of quality detection and control of nodular cast iron, and more specifically, the invention relates to a sample preparation and verification method for determining the composition of nodularized molten iron by spark discharge atomic emission spectroscopy. Background technique [0002] Accurate determination of C and S elements in spheroidized molten iron by spark discharge atomic emission spectroscopy has always been a major problem in the foundry industry. Due to the significant error in sample preparation, the scientific instruments used for determination are calibrated, which does not mean that the determination of product components is true and objective. The national standard GB / T20066-2006 does not give a clear sample preparation method for the determination of spheroidized molten iron, and the application enterprises cannot control the production process according to a unified method. Accurate diagnosis of the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N21/64G01N1/28
CPCG01N21/71G01N21/35G01N1/286G01N2001/2866
Inventor 王学杰
Owner SAIC GENERAL MOTORS
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