Products Description
Bimetallic Contact Rivets are electrical contact components fabricated by compounding a working layer of precious metal with a conductive base material. Through a cold-heading process, a silver-based alloy is bonded to a copper substrate to form a standardized connecting component that offers both excellent electrical contact performance and cost-effectiveness. Serving as the core contact element in electrical devices such as relays, switches, and contactors, this product fulfills critical functions during circuit switching operations-specifically, current conduction, arc resistance, and mechanical structural support.
Material Properties
Silver-based Alloy Working Layer
Primarily utilizes silver-based alloys such as AgCu, AgNi, AgSnO2, and AgCdO, with specific compositions selected based on the operating current and load characteristics. Silver alloys possess excellent electrical conductivity, low contact resistance, high resistance to contact welding, and superior resistance to arc erosion, making them the ideal material for Spring Loaded Electrical Contacts.
Copper Substrate
Schneider Auxiliary Contact employs oxygen-free copper or pure copper as the base material to provide structural strength and optimize cost-efficiency. The copper substrate features excellent electrical conductivity and mechanical strength, enabling it to withstand the mechanical stresses encountered during cold heading deformation and the riveting process.
Composite Interface
The bimetallic composite strip is formed through high-temperature rolling to establish a metallurgical bond; the interfacial bond strength must meet the specific requirements of subsequent cold heading and riveting processes. The quality of this interface directly impacts the reliability and service life of the Normally Open Limit Switch Electrical Contacts.
Manufacturing Advantages
Diffusion Bonding Technology
Under the protection of a vacuum or high-purity inert gas atmosphere, precisely controlled high temperatures and pressures are applied to silver alloy and copper blanks. This process induces the mutual diffusion of atoms at the interface between the two metals, creating a robust metallurgical bond free of oxide inclusions. The resulting interface exhibits high strength and low electrical resistivity, serving as the foundational basis for manufacturing the highest quality Switch Electrical Contact
Composite Rolling and In-line Non-destructive Testing
Silver alloy and copper slabs are firmly bonded together through a multi-pass hot or cold rolling process. Integrated ultrasonic or eddy current in-line inspection systems are employed during rolling to monitor the continuity of the bonding interface in real-time. This ensures the absence of defects-such as unbonded areas or delamination-thereby guaranteeing the consistency of the Leaf Spring Electrical Contacts material across large production batches.
Cold Heading of Composite Materials
The bonded plates, strips, or wires are directly formed into rivets using a multi-station cold heading process. This technique leverages the plastic flow of the metal within the die to preserve the integrity of the composite interface, while simultaneously utilizing the metal's grain flow orientation to enhance the overall strength of the finished part. We maintain precise control over forming forces and die design to prevent the interface from cracking during the intense plastic deformation involved in the process for Silver Contact Rivets With Silver Layer.
Product Customization Process
Q1: What material combination is used for Silver Coated Electrical Contacts?
A1: They primarily utilize a combination of silver-based alloys (such as AgCu, AgNi, AgSnO2, etc.) and oxygen-free copper; the specific composition can be customized based on the load rating.
Q2: What are the advantages of Silver Alloy Electrical Contacts compared to solid precious metal rivets?
A2: They offer a 30–50% reduction in cost while maintaining comparable electrical contact performance, making them better suited for large-scale manufacturing applications.
Q3: How does the thickness of the working layer of Silver Electronic Contact affect product performance?
A3: The thickness of the working layer determines the contact's service life and current-carrying capacity; increasing the thickness extends the lifespan but also increases the cost.
contact us
If you have requirements for Bimetallic Contact Rivets, need to consult on technical specifications, wish to obtain samples for validation and quotation, or would like to discuss solutions for your electrical contact applications, we invite you to contact our professional team. We will provide tailored technical support and solutions designed to meet the specific requirements of your electrical system design.
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