GB/T 42275-2022 in English
VALIDHardmetals—Determination of total carbon content—High frequency combustion infrared absorption or thermal conductivity method
- Issued on:2022-12-30
- Implemented on:2023-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$68.00
《GB/T 42275-2022硬质合金 总碳量的测定 高频燃烧红外吸收法/热导法》由TC243（全国有色金属标准化技术委员会）归口，TC243SC4（全国有色金属标准化技术委员会粉末冶金分会）执行，主管部门为中国有色金属工业协会。
Introduction
1. Background and significance of standard formulation
GB/T42275-2022 standard specifies the method of determining the total carbon content in cemented carbide using high-frequency combustion infrared absorption method and thermal conductivity method, which is applicable to carbides and compound carbides of refractory metals such as tungsten, tantalum, and niobium. This method fills the gap in this field in China and provides a unified technical specification for the industry.
2. Standard Technical Framework
| Chapter | Content Overview | Keywords |
|---|---|---|
| Scope | Applicable materials and measurement range (4.00%~20.00%) | Cemented carbide, carbon content determination |
| Principle | High-frequency combustion generates CO₂, detected by infrared or thermal conductivity | High-frequency induction furnace, infrared absorption method |
| Reagents and instruments | Flux, standard substances, oxygen and special equipment | Carbon-sulfur ceramic crucible, high-frequency induction carbon determination instrument |
3. Technical principles and implementation steps
Technical advantages: The high-frequency combustion method is highly efficient and sensitive, and is suitable for a variety of refractory metal materials. Infrared absorption method and thermal conductivity method provide two different detection methods, which can be selected according to actual needs.
Implementation steps: Sample processing → Instrument calibration → Sample measurement → Data processing
4. Implementation suggestions
- Equipment selection: It is recommended to select a high-frequency induction carbon analyzer with high precision and stability.
- Staff training: Operators need to be familiar with the principles and maintenance of the equipment.
- Quality control: Calibrate the instrument regularly to ensure measurement accuracy.
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