Welded Precious Metal Contacts
Products Description
Welded Precious Metal Contacts are an advanced type of metal contact assembly, with key features including:
Using a precious metal composite layer or a precious metal material welded to the substrate to ensure conductivity and surface stability.
Sheet structure with precise control over thickness and shape, adaptable to automated assembly machines.
Strong welds, free from incomplete soldering or delamination, provide strong resistance to vibration and thermal deformation.
Can be designed as single-layer, double-layer, or multi-layer structures to meet various current load scenarios.
Fine surface treatment, uniform contact surface, reducing initial contact resistance, and extending service life.
Supports customization of different geometries, welding methods, metal combinations, and surface electroplating processes.
It not only solves the problem of thermal fatigue in traditional rivet Silver Contact Welded for EV Charging Relay Contactor under high frequency or high current conditions, but also provides a more flexible and efficient integration method in space-constrained and compact devices.
Product Advantages – Designed for High-Reliability Electrical Systems
Stable Conductivity
The Flat Face Brazed Composite Rivet Contacts utilize a uniform precious metal layer, resulting in high surface flatness and excellent impedance consistency. This effectively reduces arc energy, minimizing temperature rise and system failures caused by poor contact.
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Strong Resistance to Welding
The precious metal material possesses superior resistance to welding. Through welding to the substrate, it maintains low loss during repeated circuit switching, exhibiting greater stability in frequently operated devices such as relays and contactors.
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Excellent Wear Resistance and Lifespan
The special metal microstructure and welded contact structure allow the contacts to maintain cross-sectional stability under mechanical wear and arc impact, resisting collapse, cracking, and delamination, thus significantly extending the overall Radius Face Brazed Composite Rivet Contacts lifespan.
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Precise Matching of Automated Equipment
The sheet structure facilitates automated welding, automatic placement, and automatic inspection, improving production efficiency and adapting to the continuous batch production needs of medium to large-scale orders.
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High degree of design flexibility
Welding with Contacts allows for the selection of silver-based alloys, gold-based alloys, palladium-based alloys, and composite precious metal combinations according to actual application scenarios, and can be applied to different current, voltage levels, and operating environments.
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Technical Features: Innovation Deeply Rooted in Materials Science
Intermetallic Compound Control
During the welding process, an intermetallic compound (IMC) layer is inevitably formed. Our core technology lies in precisely controlling the heat input and cooling rate to optimize the thickness and morphology of this IMC layer, ensuring both bond strength and preventing brittleness due to excessive thickness.
Thermal Stress Management
For material combinations with different coefficients of thermal expansion, we use finite element thermal-structural coupling analysis to predict the thermal stress distribution during welding and optimize welding paths and tooling fixtures to minimize residual welding stress and prevent welded Silver contact deformation.
Micro-area Composition Analysis
Equipped with advanced analytical equipment such as electron probe microanalysis, we can perform micro-area composition analysis on the weld interface to ensure element diffusion meets design expectations, guaranteeing long-term bond stability from a chemical composition perspective.
Solderability Design
We consider not only the manufacturing of the contacts themselves but also their application in your product. We can pre-plate a solderability coating (such as pure tin or tin-silver-copper alloy) on the back of the Composite Weld Contacts and optimize its surface activity to ensure perfect wetting in subsequent SMT or manual soldering.
Detailed Display: Excellence stems from meticulous attention to every pixel.
Weld Pool Morphology
Under a metallographic microscope, the weld interface exhibits a dense, uniform dendritic or equiaxed crystal structure. The transition between the weld and the base material is smooth, without cracks or porosity-typical characteristics of high-quality metallurgical bonding.
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Weld Edge Morphology
The weld edge is smooth, free of spatter or metal granules, indicating perfect control of welding energy and shielding gas parameters.
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Heat Affected Zone (HAZ) Control
Around the weld point, the grain size and microstructure of the base material (such as the spring) show no significant coarsening, maintaining its original mechanical properties, demonstrating effective heat input control.
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Contact Surface Integrity
After welding, the functional contact surfaces of the Electrical Contact Sheets remain clean, free of oxidation and spatter contamination, ensuring top-tier electrical performance out of the box.
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