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GB/T 37793-2019 English PDF

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GB/T 37793-2019: Quantitative analysis of dendritic segregation in steel billets
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PDF similar to GB/T 37793-2019


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Basic data

Standard ID GB/T 37793-2019 (GB/T37793-2019)
Description (Translated English) Quantitative analysis of dendritic segregation in steel billets
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H24
Classification of International Standard 77.040.99
Word Count Estimation 14,110
Date of Issue 2019-08-30
Date of Implementation 2020-07-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 37793-2019: Quantitative analysis of dendritic segregation in steel billets

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Quantitative analysis of dendritic segregation in steel billets ICS 77.040.99 H24 National Standards of People's Republic of China Quantitative analysis method for dendrite segregation of steel billet Published on.2019-08-30 2020-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. Publication of this document The organization does not assume responsibility for identifying these patents. This standard was proposed by the China Iron and Steel Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. Shougang Group Co., Ltd., Metallurgical Industry Information Standards Institute, Jiangsu Shagang Iron and Steel Research Institute Co., Ltd. The main drafters of this standard. Yan Chunlian, Yan Xinhua, Meng Yang, Liu Yangbo, Yin Lixin, Deng Suhuai, Jia Huiping, Yan Yuming, Yan Yan, Zhang Wei, Wu Yuanyuan. Quantitative analysis method for dendrite segregation of steel billet

1 Scope

This standard specifies the detection conditions, standard selection and operation steps for quantitative analysis of dendritic segregation of steel bills using an electronic probe analyzer. Steps, data processing and test reports. This standard applies to steel billets with dendritic segregation element content above 0.01% (mass fraction). Ingots, castings, steel, etc. can also be referred to use.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 4930 Microbeam Analysis Electron Probe Analysis Standard Sample Technical Conditions Guide GB/T 13298 metal microstructure inspection method GB/T 15074 General rules for quantitative analysis of electron probes GB/T 15616 metal and alloy electron probe quantitative analysis method Quantitative analysis method of electron probe for low content Si and Mn in GB/T 17360 steel GB/T 21636 Microbeam Analysis Electron Probe Microanalysis (EPMA) Terminology GB/T 32055-2015 Microbeam analysis electron probe microscopic analysis spectroscopy elemental surface analysis JJF1059.1 Measurement Uncertainty Evaluation and Representation JJG901-1995 Electron Probe Analyzer

3 Terms and definitions

The following terms and definitions as defined in GB/T 21636 apply to this document. 3.1 Dendritic segregation dendriticsegregation When the solid solution alloy is grown in a dendritic manner, there is a difference in composition between the first crystallized branch and the post-crystallized branch. 3.2 Surface analysis mappinganalysis Adjusting the spectroscopic crystal of the electron probe analyzer to the position of the characteristic X-ray wavelength of the element to be tested, using electron beam scanning or sample stage The movement method causes the electron beam to move linearly in the X and Y directions with respect to the sample, and records the change in the intensity of the X-ray to obtain the concentration of the element. Cloth image. 3.3 Line analysis Adjusting the spectroscopic crystal of the electron probe analyzer to the position of the characteristic X-ray wavelength of the element to be tested, using electron beam scanning or sample stage The moving mode causes the electron beam to move linearly with respect to the sample in a specified direction, and records the change of the X-ray intensity to obtain the concentration change of the element. Curve.

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