GB/T 15749-2008 English PDF

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GB/T 15749-2008: Measuring method in quantitative metallography
Status: Valid

GB/T 15749: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15749-2008	229	Add to Cart	3 days	Measuring method in quantitative metallography	Valid
GB/T 15749-1995	399	Add to Cart	3 days	Manual measuring method in quantitative metallography	Obsolete

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GB/T 13305   GB/T 13299   GB/T 15711   GB/T 18876.2   GB/T 18876.1   

Basic data

Standard ID: GB/T 15749-2008 (GB/T15749-2008)
Description (Translated English): Measuring method in quantitative metallography
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H24
Classification of International Standard: 77.040.30
Word Count Estimation: 10,113
Date of Issue: 2008-10-20
Date of Implementation: 2009-04-01
Older Standard (superseded by this standard): GB/T 15749-1995
Quoted Standard: GB/T 13298
Regulation (derived from): National Standard Approval Announcement 2008 No.17 (Total No.130)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the number of points with a grid method, grid cut line method, microscope eyepiece micrometer assay, segment scale assays and image analyzer determination of the volume fraction of the phase method. This standard applies to all types of alloy microstructure measured phase volume fraction.

GB/T 15749-2008: Measuring method in quantitative metallography

---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.
Measuring method in quantitative metallography ICS 77.040.30 H24 National Standards of People's Republic of China Replacing GB/T 15749-1995 Determination of quantitative metallography Posted 2008-10-20 2009-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 15749-1995 "quantitative metallography manual measurement method." This standard compared with GB/T 15749-1995, the main changes are as follows. --- Changing the name of the standard; --- Increasing the preface, test report, Appendix A "phase diagram form of reference" and Appendix B "measurement reference map"; --- Increased scale segment assay, an image analyzer method; --- Remove the basic principles and Appendix A "Measurement Example"; --- The increase or decrease of the terminology. Appendix A of this standard and Appendix B is an informative annex. The standard proposed by China Shipbuilding Industry Corporation. This standard by the National Standardization Technical Committee of marine vessels marine materials application technology at the Technical Committee. This standard was drafted. China Shipbuilding Industry Corporation seventh twenty-five Institute, Guangzhou Shipyard International Co., Ltd. The main drafters of this standard. Guo Haixia, Tonghui Rong, Li Xuefeng, Yang Yong. This standard supersedes the release of case. --- GB/T 15749-1995. Determination of quantitative metallography

1 Scope

This standard specifies the number of points with the grid method, the grid line transect method, a microscope eyepiece micrometer assay, assay and line scale image analyzer The method was used to determine the percentage of phase volume. This standard applies to all types of alloy microstructure phase measurement volume percent.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 13298 metal microstructure inspection method 3 Terms, definitions and symbols 3.1 Terms and Definitions The following terms and definitions apply to this standard. 3.1.1 The image characteristic parameter or a two-dimensional cross-sectional plane of projection recovery (or deduction) three-dimensional image morphology of science. 3.1.2 According to stereological principles, measurements and calculated by the two-dimensional metallographic sample grinding surface of the parameters to determine the three-dimensional phase space volume percent. 3.1.3 According to the critical value of the color image is converted to only two binary images. 3.2 Symbol The following symbols apply to this standard. AA --- analyte relative area%; L --- certain angle measuring segment length, in millimeters (mm); LL --- analyte phase line,%; L1 ~ L8 --- a certain angle is measured relative to the line was cutting the segment length, in millimeters (mm); PP --- analyte phase points,%; Vp V --- analyte phase volume%.

4 Determination

4.1 General 4.1.1 swap formula STEREOLOGY see equation (1). Vp V = AA = LL = PP (1) 4.1.2 Cut samples taken and prepared according to GB/T 13298 with the relevant provisions will be. 4.1.3 magnification should be chosen in order to clearly distinguish the boundary morphology and phase analyte prevail, on this basis, select a lower multiples. ......

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