For OEMs and industrial companies, the quality of a tungsten carbide bushing depends heavily on the authenticity of its material.
Poor-quality or mixed-grade carbide can lead to early wear, cracking, leakage, and unexpected downtime.
This guide explains practical methods to verify whether a 텅스텐 카바이드 부싱 is made from true, high-grade materials.
It is written in simple English and designed for decision-makers who need clear and reliable information.
Why Material Authenticity Matters for OEMs
The performance of a tungsten carbide bushing comes mainly from the purity of 텅스텐 카바이드 분말 and the quality of the binder (cobalt or nickel).
If a supplier uses recycled powder, low-purity carbide, or incorrect binder ratio, the bushing will fail earlier than expected.
1). Risks of using non-authentic material
낮추다 경도 and faster wear
더 높은 다공성 leading to cracks
Poor chemical resistance
줄인 밀도
Weak bonding between carbide particles
Shorter service life and more replacements
2). Typical Failure Impact Table
| 문제 | Cause | Effect on Equipment |
|---|---|---|
| Low hardness | Weak binder or recycled powder | Fast wear, shorter lifetime |
| High porosity | Poor sintering quality | Cracks, chipping, leakage |
| Wrong binder ratio | Uncontrolled cobalt/nickel levels | Low toughness or poor corrosion resistance |
Verify Material Through Chemical Composition Testing
Material composition determines hardness, wear resistance, and corrosion resistance. The most reliable way to confirm authenticity is chemical analysis.
1). Common chemical tests
XRF (X-ray Fluorescence): Detects tungsten carbide purity, binder type, and contamination.
ICP-OES / ICP-MS: Gives precise measurement of cobalt, nickel, iron, and other trace elements.
Carbon & oxygen analysis: Shows moisture or oxidation in carbide powder.
2). What OEMs should require
A chemical composition report for every batch
Clear grade statement (e.g., WC-6Co, WC-12Co, WC-Ni)
Zero recycled powder unless approved
Proof that powder source is stable and consistent
If a supplier cannot offer composition reports, authenticity is doubtful.
Use Density and Porosity Testing
Tungsten carbide is a high-density material. If density is too low, it means the sintering process was poor or the material is not pure.
1). 밀도 testing methods
Archimedes density test (most common)
Hydrostatic weighing
Helium 다공성 test (advanced)
2). Typical density values
Standard WC-Co: 14.4–15.0 g/cm³
Low density = high porosity → poor wear life
3). Density Evaluation Table
| 밀도(g/cm³) | Quality Level | Interpretation |
|---|---|---|
| 14.8–15.0 | 훌륭한 | Low porosity, correct binder ratio |
| 14.4–14.7 | Acceptable | Normal commercial level |
| Below 14.3 | 가난한 | High porosity or mixed materials |
Verify Authenticity Through Hardness Testing
Hardness reveals heat-treatment quality, binder ratio accuracy, and grain structure stability.
1). Hardness expectations
WC-6Co: ~1700 HV
WC-12Co: ~1500 HV
Submicron WC: 1800 HV+
If hardness deviates significantly, the material is not authentic.
2). Typical hardness tests
Vickers 경도 (HV)
Rockwell A
OEMs should always request hardness data for every batch.
Check Microstructure With Microscopy
에이 텅스텐 카바이드 부싱’s microstructure can reveal whether the raw powder was pure, mixed, recycled, or sintered properly.
1). What inspectors look for
Uniform WC grains
No abnormal grain growth
Even binder distribution
No cracks, pits, or voids
No contamination particles
2). Equipment used
Optical microscope (basic check)
SEM (Scanning Electron Microscope) (detailed analysis)
Microstructure provides the strongest visual proof of authenticity.
Non-Destructive Testing (NDT) for Hidden Defects
NDT methods help detect internal problems that suggest poor-quality or fake materials.
Common NDT methods
Ultrasonic testing – finds internal cracks or voids
Dye penetrant inspection – finds surface defects
Eddy current testing – detects structural differences
If a bushing has many internal defects, the material quality is probably fake or low-grade.
Evaluate Supplier Documentation and Traceability
A strong supplier provides complete documentation and full traceability.
1). Documents that prove authenticity
Material certificate (MTC)
Chemical composition report
밀도 report
경도 report
Microstructure images
NDT test results
Powder batch number and source
2). Traceability Table
| Item | Strong Supplier | Weak Supplier |
|---|---|---|
| Powder source record | Clear and traceable | Not provided |
| Chemical reports | Every batch | Sometimes missing |
| Hardness & density | Full test data | Not detailed |
결론
Verifying the authenticity of tungsten carbide bushings is essential for ensuring long service life and safe equipment operation.
OEMs should check chemical composition, density, hardness, microstructure, NDT results, and supplier documentation.
With the right verification steps, decision-makers can protect their equipment, reduce downtime, and avoid poor-quality products.
회사에 대한 자세한 내용을 알고 싶으시면 언제든지 문의해 주세요. 문의하세요.
English 
Español 
简体中文 
Français 
日本語 
한국어 
العربية 
Tiếng Việt