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GB/T 15749-2008Measuring method in quantitative metallography (English PDF)

定量金相测定方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 20, 2008

Implementation date

April 1, 2009

Scope

GB/T 15749-2008 is the English-translated version of 定量金相测定方法.

GB/T 15749-2008 is the Chinese standard "Measuring method in quantitative metallography".

Its scope clause reads: 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. Its clauses include terms, definitions and symbols; determination.

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Document preview — GB/T 15749-2008

National Standard of the People's Republic of China

ICS: 77.040.30
Classification: H 24
Replacing: GB/T 15749-1995

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Determination

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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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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Editions of GB/T 15749

Edition	Title	Revision	Status
GB/T 15749-2008	Measuring method in quantitative metallography	current edition	Current
GB/T 15749-1995	Measuring method in quantitative metallography	previous edition	Superseded

This page sells the current edition, GB/T 15749-2008. Earlier editions are listed for reference only.

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