Search result: GB/T 23605-2020 (GB/T 23605-2009 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23605-2020 | English | 339 |
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Determination of β transus temperature of titanium alloys
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GB/T 23605-2020
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| GB/T 23605-2009 | English | 479 |
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Method for β transus temperature determination of titanium alloys
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GB/T 23605-2009
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| Standard ID | GB/T 23605-2020 (GB/T23605-2020) | | Description (Translated English) | Determination of �� transus temperature of titanium alloys | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Classification of International Standard | 77.120.50 | | Word Count Estimation | 18,172 | | Date of Issue | 2020-03-06 | | Date of Implementation | 2021-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 23605-2020
Determination of β transus temperature of titanium alloys
ICS 77.120.50
H21
National Standards of People's Republic of China
Replaces GB/T 23605-2009
Method for measuring β-transition temperature of titanium alloy
2020-03-06 release
2021-02-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 23605-2009 "Method for determination of β-transition temperature of titanium alloys".
Compared with GB/T 23605-2009, except for editorial changes, the main technical changes of this standard are as follows.
--- Removed the normative reference file GB/T 13298 (see Chapter 2, Chapter 2 of the.2009 edition);
--- Modify the element "Method Principle" to "Principle" and change "Primary Alpha" to "Primary Alpha Phase or Precipitated Alpha Phase" (see Chapter 4,.2009
Chapter 4 of the edition);
--- Modify the element "sampling requirements" to "samples" and modify the corresponding sample requirements (see Chapter 5, Chapter 5 of the.2009 edition);
--- Modified the element "test equipment requirements" to "instrument equipment" and modified the corresponding requirements (see Chapter 6,.2009 edition
Chapter 6);
--- Modified the element "test conditions and requirements" to "test steps", and modified the interval between the heat treatment temperature of the sample and the holding time of the sample
And quenching delay time requirements (see 7.1, Chapter 7 of the.2009 edition);
--- Removed the "recommended ordinary annealing after quenching" provisions (see 7.1.3 of the.2009 edition);
--- Modified the element "metallographic sample preparation and inspection requirements" to "test steps" and revised the corresponding requirements (see Chapter 7,.2009
Chapter 8 of the edition);
--- Increased the provisions for corrosion and inspection magnification of samples (see 7.2.2 and 7.2.3);
--- Modified the judgment method of β-transition temperature and the expression of results (see Chapter 8, 9.1 of the.2009 edition);
--- Modify the element "inspection report" to "test report" and modify the corresponding content (see Chapter 9, Chapter 10 of the.2009 edition);
--- Amended Appendix B, and listed the typical quenching micrograph of β-transition temperature judgment of α-type, α-β-type and metastable β-type titanium alloys
(See Appendix B, Appendix B of the.2009 edition).
This standard is proposed by China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This standard was drafted. Baotai Group Co., Ltd., Baoji Titanium Industry Co., Ltd., Nonferrous Metals Technology and Economic Research Institute, Baosteel Special Steel
Co., Ltd., Northwest Nonferrous Metal Research Institute, Western Metal Materials Co., Ltd., Western Superconducting Material Technology Co., Ltd.
The main drafters of this standard. Mu Danning, Shi Wen, Li Jian, Li Xiao, Zhang Lei, Xie Chen, Feng Junning, Bai Zhihui, Feng Yongqi, Gu Yan, Wang Songmao,
Ma Hongzheng, Zhu Jing, Gao Yan, Jia Shuanxiao.
The previous versions of the standards replaced by this standard are.
--- GB/T 23605-2009.
Method for measuring β-transition temperature of titanium alloy
1 Scope
This standard specifies the principle of metallurgical method for the determination of β-transition temperature of titanium alloys, samples, equipment, test procedures, determination of test results,
And test report.
This standard applies to the use of metallographic methods to determine the β-type, α-β-type and metastable β-type titanium alloys β transition temperature.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 5168 Titanium and titanium alloy high and low magnification microstructure inspection method
GB/T 9452 Determination method of effective heating zone of heat treatment furnace
3 terms and definitions
The following terms and definitions apply to this document.
3.1
βtransustemperature
The lowest temperature at which all titanium alloys transform to β-phase structure during heating is represented by Tβ.
4 Principle
α-type, α-β-type and metastable β-type titanium alloys all contain a certain number of primary α-phases after smelting, hot deformation, annealing and solution aging.
The aging phase precipitates an alpha phase. As the temperature increases, the α phase in the titanium alloy gradually decreases, and when it reaches a certain critical temperature, it will all transform into β phase structure.
After the critical temperature is maintained for a certain period of time, rapid quenching can obtain acicular martensite or metastable β-phase structure without α phase. Through view
Check the metallographic structure of the sample after quenching at different temperatures according to the preset temperature interval to determine the β-transition temperature of the titanium alloy.
5 sample
5.1 Samples can be taken from any part of the product processing process, such as intermediate ingots such as ingots, rod billets, forging billets and slabs, or bars, plates
For processed products such as wood, the same group of sample blanks should be taken from the same processing link of the product. If the product standard has requirements for sampling,
Quasi-execution.
5.2 When cutting the sample, deformation and overheating should be avoided, and the surface to be tested of the sample should be able to better represent the entire cross-section structure of the material.
5.3 The sample should be a cylinder with a diameter of 10mm ~ 12mm and a height of 15mm, or a rectangular parallelepiped with a side length of 10mm ~ 12mm and a height of 15mm.
5.4 The number of samples in each group is usually five, which can also be appropriately increased or decreased.
5.5 Phase transition test of metastable β-type titanium alloys in hot and solid solution state. If necessary, the sample blank should be heat treated first. TB2, TB3 are recommended
The heat treatment system with TB5 is. After holding at 650 ℃ ± 10 ℃ for 1 hour, it is cooled to 550 ℃ ± 10 ℃ with the furnace and air-cooled.
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GB/T 23605-2009
Method for β transus temperature determination of titanium alloys
ICS 77.120.99
H14
National Standards of People's Republic of China
Determination of β titanium alloys transition temperature
Posted 2009-04-15
2010-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The Standard Annexes A and B are informative appendices.
The standard proposed by China Nonferrous Metals Industry Association.
This standard Nonferrous Metals by the National Standardization Technical Committee.
This standard was drafted. Baoji Titanium Group Ltd., Baoji Titanium Industry Co., Ltd.
The main drafters of this standard. Xu Zhu Ping, Wang Yongmei, Song Jin, Lixian Jun, Feng Yongqi.
Determination of β titanium alloys transition temperature
1 Scope
This standard specifies the method for the determination of titanium alloy β using optical transition temperatures.
This standard applies to the determination of α, α-β and metastable β-type titanium alloy β transition temperature.
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 5168 α-β titanium alloy low fold inspection method
Determination of GB/T 9452 heat treating furnace zone
GB/T 13298 metal microstructure inspection method
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Titanium in the heating process was transformed to β-phase structure of the lowest temperature, represented by Tβ.
4 principle of the method
[alpha] type, α-β type titanium alloys and metastable beta] in a state below the transition temperature beta], [alpha] contain a certain amount of phase. In the β transition temperature
Degrees, as the heating temperature increases, the content of titanium in the primary α phase is less and less, the content of β phase, more and more, up to a certain critical temperature
After the degree, it will be transformed to β phase. Rapid quenching to maintain a certain time in the critical temperature, the needle can not reach the primary α phase
Martensite or metastable β-phase structure. By observing the quenching, microstructure, we can determine all of the titanium alloy into β-phase structure
The lowest temperature.
This method is in the vicinity of the estimated by measuring the β transformation temperature, a series of samples at different temperature and microstructure after heat treatment
The primary α phase content to complete.
5 sampling requirements
5.1 Sampling location and requirements
5.1.1 shall be measured ingot smelting furnace number β transition temperature. Blank samples may be taken from the middle of the ingot, billets, forging billet and slab of the blank
A rod, sheet or other processed products. Recommended choice for the intermediate material or processed products in the sample to measure. If the product standard of β sample transfer
Varying temperature measurement location specified, shall be the product standards.
5.1.2 Sample blank original organization should be as uniform as possible. When necessary, the sample can be forged billet (for example upsetting) in α-β phase region, to ensure
Uniformity of the sample blank card organization.
5.2 coupons
5.2.1 cut the sample, should try to avoid deformation and overheating. The coupons should be more regular diameter of 10mm ~ 15mm, height
10mm ~ 15mm rod cylinder or side length of 10mm ~ 15mm cube. The observation area should be able to better represent the sample
Entire cross-section.
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