GB/T 42259-2022 in English
VALIDMetallic and other inorganic coatings—Test methods for measuring thermal cycle resistance and thermal shock resistance for thermal barrier coatings
- Issued on:2022-12-30
- Implemented on:2023-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$262.00
《GB/T 42259-2022金属及其他无机覆盖层 热障涂层耐热循环与热冲击性能测试方法》由TC57（全国金属与非金属覆盖层标准化技术委员会）归口，TC57SC2（全国金属与非金属覆盖层标准化技术委员会热喷涂分会）执行，主管部门为中国机械工业联合会。
Introduction
1. Background and significance of the standard
GB/T42259-2022 "Test method for thermal cycle and thermal shock resistance of thermal barrier coatings of metals and other inorganic covering layers" is the first standard formulated in my country on the durability test of thermal barrier coatings. It is mainly applicable to coating systems serving in high temperature environments such as gas turbines and aircraft engines.
2. Comparison of standard frameworks
| Standard dimensions | GB/T42259-2022 | ISO14188:2012 | Difference analysis |
|---|---|---|---|
| Scope of application | Metallic and inorganic covering thermal barrier coatings | Same as above | Added adaptability requirements for high-temperature alloy substrates |
| Test method | Combination of steady-state cyclic heating + cooling and water quenching | Mainly steady-state cyclic heating + cooling | New thermal shock performance test requirements |
| Evaluation indicators | Critical number of peeling cycles, tensile bond strength reduction rate | Tensile bond strength test only | Added heat resistance cycle performance indicators |
3. Recommendations for standard implementation
3.1 Recommendations for test equipment selection
- High temperature electric furnace: It is recommended to use German Lindsay or Japanese Hitachi brands to meet the 1600℃ temperature control requirement
- Rapid cooling system: It is recommended to configure a closed-loop water cooling device
- Thermocouple temperature meter: Accuracy ±0.5℃, response time less than 1 second
3.2 Precautions for sample preparation
- The sample surface should be free of obvious scratches and oxide scale
- It is recommended to use plasma spraying or high velocity oxygen fuel (HVOF) process to prepare the coating
- Ensure that the substrate material is a nickel-based high-temperature alloy, such as GH4169 or Rene80
3.3 Data Analysis and Report Writing
It is recommended to use professional software such as OriginLab for data fitting and visualization to ensure that the test results meet the accuracy requirements specified in GB/T42259-2022.
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