Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Hardide Coatings
Hardide® is a family of low temperature CVD (chemical vapor deposition) tungsten carbide/tungsten metal matrix composite coatings that extend the life of critical metal components. The coatings have a unique combination of abrasion, erosion and chemical resistant properties while being tough, ductile and impact resistant.
Applications & Uses
- Markets
- Applications
- Application Area
- Application Method
- Compatible Substrates & Surfaces
- Applications
Hardide-T has enhanced toughness and is suitable for heavy duty applications in extremely abrasive and erosive environments where a thicker coating (typically 50 microns) is required or in applications involving shock loads where impact resistance is required.
• Can be applied to both internal and external surfaces, including complex shapes uniformly
• Smooth, uniform as-coated surface minimizes expensive grinding and finishing operations
• Easily applied to a wide range of metallic substrates including ferrous and nickel-based alloys, and most grades of stainless and carbon steels
• Applications include downhole tools, valves, flow control components, pumps, sealing and bearing surfaces, heavy duty earth-moving equipment, hydraulics, powder compaction and tool & die
• Industries served include oil and gas, aerospace, petrochemical, valves, pumps, material processing, power generation, steam and industrial gas turbines, industrial production tooling, pulp and paper processing, food manufacturing and motorsport
Properties
- Typical Properties
- Key Properties
Coating Thickness Typically 50 microns (0.002”)
Thicker coatings can be produced, ask for detailsCoating Toughness Excellent. Good resistance to thermal shockStrain to Fracture Higher than 0.3% (3000 microstrain)Adhesion Tensile Bond Strength Greater than 70 MPa or 10,000 psi*
Under standard bond test ASTM C633-01, the Hardide coating adhesion bond has been proven to be higher than the adhesive ultimate strength of 70 MPa (10,000 psi)
*Adhesive glue can separate at lower valuesCoating Composition Tungsten with nano-structured Tungsten Carbide
Does not contain Cobalt or other metal binder materials used in Cemented Carbides and thermal spray coatingsCoating Porosity < 0.5% as measured in accordance with ASTM E2109Appearance Coating as applied is light gray
Finishes to a high metallic luster when polishedFinishing Operations Grinding, Honing, Lapping, Polishing, Super-finishingSurface Finish As coated, has a smooth conformal finish. Typically, surface roughness after light polishing will be similar to the part before coating.
Without the need for grinding can be polished to 0.2 - 0.3 microns Ra
(8 - 12 μin) and with grinding, super finished to 0.02 microns Ra (0.8 μin)Corrosion Resistance Resistant to acids, H2S and some aggressive chemicals
Passed NACE 30 day Sulfide Stress Cracking (SSC) test to
NACE TM0177-2005/ASTM G39-Method B (1 bar H2S)
Passed 480 hours neutral salt spray corrosion test ASTM B117Coating Temperature Typically 460° to 520°C / 860° to 968°F dependent on substrate
| Value | Units | Test Method / Conditions | |
| Electrical Resistivity (20°C) | 5.5 | microhm-cm | — |
| Linear Coefficient of Expansion | 4.3 x 10-⁶ | ºC | — |
| Density (20ºC) | 19.3 | gm/cc | — |
| Thermal Conductivity @ 20ºC | 174.0 | W/m·K | — |
| Specific Heat Capacity @ 20ºC | 0.132 | J/g·K | — |
| Microhardness (Hv100) | 1100 - 1600 | kgf/mm2 | — |
Regulatory & Compliance
- Certifications & Compliance
- Certifications
Hardide Coatings’ UK and USA manufacturing sites are approved to ISO 9001 and aerospace AS 9100 certification. The UK site is also accredited to Nadcap and ISO 14001.