GB/T 14999.4-2012 English PDF

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GB/T 14999.4-2012: Test methods for superalloys -- Part 4: Determination of characterizing banding grains and primary carbides distribution of super alloy rolling
Status: Valid

GB/T 14999.4: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14999.4-2012	369	Add to Cart	3 days	Test methods for superalloys -- Part 4: Determination of characterizing banding grains and primary carbides distribution of super alloy rolling	Valid
GB/T 14999.4-1994	199	Add to Cart	2 days	Methods of examining micro-structures for heat-resisting superalloys	Obsolete

Similar standards

GB/T 13305   GB/T 13299   GB/T 15711   GB/T 14999.2   GB/T 14999.3   GB/T 14999.1   

Basic data

Standard ID: GB/T 14999.4-2012 (GB/T14999.4-2012)
Description (Translated English): Test methods for superalloys -- Part 4: Determination of characterizing banding grains and primary carbides distribution of super alloy rolling
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H24
Classification of International Standard: 77.140.99
Word Count Estimation: 16,184
Older Standard (superseded by this standard): GB/T 14999.4-1994; GB/T 14999.5-1994
Quoted Standard: GB/T 6394; GB/T 24177
Regulation (derived from): National Standards Bulletin No. 28 of 2012
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 superalloy microstructure determination of terms and definitions, and preparation of the sample cut, test methods and measurement methods, results indicated that inspection reports. This section applies to high-temperature allo

GB/T 14999.4-2012: Test methods for superalloys -- Part 4: Determination of characterizing banding grains and primary carbides distribution of super alloy rolling

---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.
Test methods for superalloys Part 4. Determination of characterizing banding grains and primary carbides distribution of superalloy rollings ICS 77.140.99 H24 National Standards of People's Republic of China Replacing GB/T 14999.4-1994 Partially replace GB/T 14999.5-1994 Superalloys Test methods - Part 4. Rolled strip superalloy grain structure and a Carbide distribution measurement Testmethodsforsuperaloys-Part 4. Determinationofcharacterizingbanding Issued on. 2012-11-05 2013-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 14999 "superalloys test methods" is divided into six parts. --- Part 1. Portrait of macrostructure and defect acid leaching test; --- Part 2. horizontal macrostructure and defect acid leaching test; --- Part 3. longitudinal fracture test bars; --- Part 4. Rolling superalloy strips the grain structure and a carbide distribution measurement; --- Part 6. Wrought superalloys double the grain structure and a carbide distribution measurement method; --- Part 7. high-temperature alloy castings grain size, dendrite arm spacing and a loose microscopic measurement method. This section GB/T Part of 414,999. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 14999.4-1994 "superalloy microstructure test method" and GB/T 14999.5-1994 "superalloys Low magnification, high power rating organization Standard Atlas "in Chapter 3," superalloy purity rating map "and Chapter 4," banded grain size grading atlas. " This section compared with the GB/T 14999.4-1994, the main changes are as follows. --- Standard name changed to "hot rolled strip alloy grain structure and a carbide distribution measurement method"; --- Increasing the "Introduction", "range", "normative references", "Terms and Definitions", "The results are shown" and "test" and other technical Content (see Chapter 1, Chapter 2, Section 3, Chapter 6 and Chapter 7); --- Added two bar sample recommended etchant (see Table 2, 1994 edition of the Table 2); --- Abolition of the "Evaluation of grain size" (see 1994 version 3.2); --- The "fine-grained concentrate grading atlas ribbon" to "strip grains rating standard map" and adds the result shows an example (See Appendix A, GB/T 14999.5-1994 4.1); --- Remove the "scatter band grain grading atlas" (see GB/T 14999.5-1994 4.2); --- The "superalloys purity rating map" changed to "rolling superalloy primary carbides standards diagrams" (see Appendix B, GB/T 14999.5-1994 of Chapter 3). This part is proposed by the China Iron and Steel Association. This part of the National Steel Standardization Technical Committee (SAC/TC183) centralized. This part mainly drafted by. Dongbei Special Steel Group Co., Ltd., Steel Research Institute, Metallurgical Industry Information Standards Institute. The main drafters of this section. Chan new, Luan Yan, Yuan Ying, Wu Guilin, DAI Qiang, Wang Zhigang, Gu Qiang, Zhuangjing Yun. This section was first released in April 1994. This part of the standard replaces the previous editions are. --- GB/T 14999.4-1994, --- GB/T 14999.5-1994.

Introduction

This section is basically the original geometry based on real photos, so regardless of the alloy itself. If the alloy strip grain group Organizations and a carbide distribution and this section provides a rating consistent picture can be assessed using this section provides comparative law. Crystal strip Granulated tissue can also be quantitatively assessed by the method specified in this part. As part of this recommended measurement method applies only to two-dimensional plane (cross section) with grains and determination of a strip of carbide distribution, but Can not determine the subject of high-temperature alloy rolled strips the grain structure and a carbide distribution is received or suitable range for use. Superalloys Test methods - Part 4. Rolled strip superalloy grain structure and a Carbide distribution measurement

1 Scope

This section GB/T 14999 specifies the superalloy microstructure measurement terms and definitions, sample preparation and cut, and test methods Measuring method, the results indicated that inspection reports. This section applies to rolling temperature alloy strips the grain structure and a carbide distribution of inspection and assessment.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 6394 Determination of average grain size of metal GB/T 24177 double grain size characterization and determination

3 Terms and Definitions

GB/T 6394 defined by the following terms and definitions apply to this document. 3.1 Dual grains duplexgrainsizes Two distinctly different sizes, different distributions of crystal grains at least, and the grain size differential is not less than three. 3.2 Strip grain bandinggrains Grain size distribution of a large difference in the machine direction (differential of not less than three) of alternating regions, the alloy is not uniform organization. 3.3 Focus strip grain concentratebandinggrains Rows of grain strips organization. 3.4 A carbide distribution primarycarbidesdistribution Longitudinal cross-section of the sample along the rolling direction of the strip once zonal distribution of carbide particles.

4 Sample preparation and cut

4.1 cut 4.1.1 specimens cut direction, location and number shall be specified in the product standard or the appropriate technical conditions. Not specified, the general should be parallel To the rolling direction of the product (longitudinal) sampling. Sample diameter or side grow up to 32mm, the longitudinal sample cut 1/2 of its test surface Centerline axis through the center should be (the deviation of ± 0.5mm); sample diameter or length was longer than 32mm, the longitudinal direction of the cut sample ......

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