GB/T 14999.1-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14999.1-2025	RFQ	ASK	3 days	Test method for superalloys - Part 1: Macro-structures	Valid
GB/T 14999.1-2012	599	Add to Cart	5 days	Test method for super alloys -- Part 1: Verification of longitudinal macro-structures and defect by etch	Valid
GB/T 14999-1994	RFQ	ASK	3 days	Macroscopic and microscopic testing methods and grading figure for heat-resisting superalloys	Obsolete
GB/T 14999.1-1994	199	Add to Cart	2 days	Methods of acid etch test for longitudinal macro-structures of heat-resisting superalloy bars	Obsolete

Basic data

Standard ID: GB/T 14999.1-2025 (GB/T14999.1-2025)
Description (Translated English): Test method for superalloys - Part 1: Macro-structures
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 14999.1-2012, GB/T 14999.2-2012, GB/T 14999.3-2012

GB/T 14999.1-2012: Test method for super alloys -- Part 1: Verification of longitudinal macro-structures and defect by etch

---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 method for superal loys Part 1. Verification of longitudinal macro-structures and defect by etch ICS 77.140.99 H24 National Standards of People's Republic of China Replacing GB/T 14999.1-1994 Partially replace GB/T 14999.5-1994 Superalloys Test methods - Part 1. Portrait macrostructure and defect acid leaching test Testmethodforsuperalloys-Part 1. Verificationoflongitudinal 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 14999 Part 1. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 14999.1-1994 "superalloy bars longitudinally low acid etch test method" and GB/T 14999.5- 1994 "superalloys low magnification, high power rating organization Standard Atlas" in Chapter 1, "superalloy bars for longitudinal grading atlas." This section compared with the GB/T 14999.1-1994, the main changes are as follows. --- Increase the "scope", "normative references", "Types and characteristics of defects and uneven organizations", "result representation", "check Inspection report "and other technical content (see Chapter 1, Chapter 2, Section 3, Chapter 6 and Chapter 7); --- Increasing the high-temperature alloy ingot, melt the technical content of the subject material, forging (rolling) or blank pieces of longitudinal low magnification inspection items (see 5.2, 5.3); --- Increased macroscopic deformation superalloy grain size rating methodology and standards diagrams (see 5.3.1 and Figure B.1); --- Increased coarse grain strips organization rating methodology and standards diagrams (see 5.3.2 and Figure B.2); --- Increasing the fine grain carbide strips organization and a striped organization rating methodology and standards diagrams (see 5.3.3,5.3.4, and FIG. B.3, Figure B.4); --- Added "superalloy ingots longitudinal low magnification and defects typical picture" and "high temperature alloy melt picking, forging (rolling) or blank pieces Longitudinal low magnification and defects typical picture "(see Appendix A and Appendix C); --- Included in the GB/T 14999.5-1994 in Chapter 1, "superalloy bars longitudinal low magnification rating map", and re-repair The words "standards diagrams and allowed defects typical picture" (see Appendix B, GB/T 14999.5-1994 of 1 chapter). 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. Wu Guilin, Yuan Ying, Luan Yan, Chen Qing new, wear strong, Zhuangjing Yun, Wang Zhigang, strong valley. This part of the standard replaces the previous editions are. --- GB/T 14999.1-1994; --- GB/T 14999.5-1994.

Introduction

This section gives a macroscopic deformation superalloy average grain size, coarse grain strips, strips of fine grain, a carbide strips rating organization Standard Pictures, and high-temperature alloy ingots, picking melting, forging (rolling) or blank pieces of longitudinal low magnification and defects typical pictures. This section as a recommended test method applies only to the longitudinal low magnification defect inspection and uneven organization of a two-dimensional plane (cross-section), it can not Superalloy determine the subject of longitudinal low magnification defect and whether to accept or use the appropriate range. Superalloys Test methods - Part 1. Portrait macrostructure and defect acid leaching test

1 Scope

This section GB/T 14999 specifies the superalloy longitudinal low magnification common defects and uneven tissue types and characteristics of the sample Interception and preparation, inspection and evaluation of the results indicates methods, inspection reports. This section applies to high-temperature alloy ingots, inspection longitudinal low magnification picking melting, forging (rolling) or blank pieces and defects. Other products Senate According to the Executive.

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

3 Types and Characteristics of Common Defects and uneven organizations

Type and characteristics of the following common defects and uneven organizations described are applicable to this document. 3.1 Alien slag slaginclusion Defects in the smelting and casting process into the alloy in the slag or refractories and other foreign material. 3.2 Iso-metallic inclusions nonmetalicinclusion In the process of smelting and casting, the alloy material is not fully melted or mixed with different metals and the formation of defects. In the acid leaching test piece with the base color Different organizations, with no fixed shape. There are some clear boundaries with the matrix organization, and some ill-defined. 3.3 Residual shrinkage residualshrinkage Due to insufficient amount of alloy ingot cutting head, so that part of the residual shrinkage to the preform to form defects. In times of low alloy acid leaching transverse test pieces The central portion of irregular voids or cracks; longitudinal tubular specimen was reduced; the longitudinal fracture, parts corresponding to residual shrinkage delamination. In or near which is often accompanied by severe osteoporosis, inclusions (slag) and segregation. 3.4 Loose shrinkage Since the organization is not sufficient feeding liquid alloy formed less dense defects. In times of low alloy acid leaching laterally central portion of the test piece was Diablo Color dots and tiny pores; longitudinal fracture layered, fibrous. In loose gathered at more gas and inclusions. 3.5 Internal bubble internalairhole, internalbubbles Due to the presence of large amounts of gas caused by the ESR process. On the alloy ingot transverse specimen low magnification bubble circular holes, longitudinal low Times were on the test piece spindle hole, sometimes ranging from the length of the silkworm-shaped grooves, appearing at the bottom of ESR ingots; in forging, rolling transverse specimen low magnification The flocks were irregular short "S" shape of fine cracks; at high magnification observation, the non-inclusion of cracks. ......

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