Material Characteristics
HVDC new energy high-voltage DC contactor parts rely on a strategic combination of metals and advanced ceramics to meet extreme operational demands. Precision Metallized Alumina Ceramic Components serve as critical insulating components, boasting a dielectric strength that prevents electrical breakdown while facilitating heat dissipation. For conductive elements, copper-chromium (CuCr) and silver-tungsten (AgW) alloys are selected for their exceptional arc resistance and electrical conductivity.
High Purity Alumina Precision Advanced Ceramic Metallization Parts act as interfaces between metal and ceramic components, featuring a metallized layer with high peel strength to withstand mechanical stress during contactor operation. Metal parts, such as contact bridges and terminal blocks, exhibit high tensile strength and corrosion resistance, achieved through alloy formulation and surface treatments. These materials collectively ensure the parts can endure temperature fluctuations and voltage spikes common in new energy systems.
Production Process Flow
Material Preparation and Purification
Raw metal alloys undergo vacuum melting to eliminate gas impurities. It's vital for preventing voltage leakage. Precision Metalized Ceramics are sourced with pre-metallized surfaces, requiring initial ultrasonic cleaning to remove contaminants that could hinder bonding with metal components. Metal sheets are annealed to relieve internal stress, ensuring dimensional stability during subsequent processing.
Precision Forming and Machining
Metal components are shaped using progressive stamping dies. Complex geometries, such as threaded holes and mating surfaces, are crafted via CNC machining. Alumina ceramic parts precision machining involves laser cutting to create insulating spacers, ensuring minimal thermal damage to the ceramic structure and preserving the integrity of the metallized layer.
Surface Treatment and Coating
Contact surfaces of metal parts undergo electroplating with silver or gold layers to minimise contact resistance and enhance wear resistance. Plating uniformity is verified using X-ray thickness gauges. Precision Metallized Alumina Ceramic Components receive a secondary polishing step using diamond abrasives, achieving a surface roughness (Ra) to optimise adhesion with metal coatings. Metal parts also undergo passivation to form a protective oxide layer, extending service life in humid environments.
Quality Control Key Points
| Dimensional Accuracy | Coordinate Measuring Machines (CMM) inspect all parts to ensure compliance with design specifications. |
Material Integrity |
X-ray inspection detects internal defects in Precision metallized alumina ceramic components, ensuring no cracks or delamination. Metal alloys undergo hardness testing to verify mechanical durability. |
FAQ
Q: WHAT ARE YOUR CERTIFICATES?
A: We have lSO9001, IATF 16949 certificates, RoHS and Reach
Q: DO YOU TEST ALL YOUR GOODS BEFORE DELIVERY?
A: Yes, we have a 100% test before delivery.
Q: WHAT IS YOUR TERMS OF PAYMENT?
A: Usually, we accept bank T/T, irrevocable L/C at sight. For regular orders, we prefer 30% in advance .70% balance before shipment.
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