Products Description
The Relay core nickel plating with copper undercoat uses high-permeability silicon steel or low-carbon electrical steel as the base material. Through a copper undercoat + nickel plating composite surface treatment process, it significantly improves corrosion resistance, weldability, and service life while ensuring stable magnetic properties. Combined with hydrogen-protected continuous annealing and demagnetization processes and high-precision tungsten steel die stamping technology, it is a core component in the critical magnetic circuit structure of new energy vehicles.
Deep Optimization of Electromagnetic Pure Iron Substrate
Ultra-High Purity Control
Iron content ≥99.8%, with strict control over harmful impurity elements such as C, S, and P, and carbon content ≤0.004%. Extremely low impurity content is the physical basis for achieving low coercivity and high permeability, ensuring rapid response in magnetic field establishment and dissipation for Relay core cold heading.
Grain Orientation Optimization
Through special rolling and annealing processes, a uniform, equiaxed grain structure (grain size ASTM 7-8) is obtained. This structure effectively reduces hysteresis loss and increases magnetic flux density, enabling compact design for Pure Iron Core.
Customized Material States
Different material solutions can be provided based on customers' different priorities regarding permeability and mechanical strength for Iron Core Relay Part, including soft (high permeability), semi-hard, or hard (with some elasticity) states.
Dual-Layer Composite Electroplating Process
Pretreatment
This includes electrolytic degreasing and acid pickling activation to thoroughly remove any trace amounts of oil and oxide film that may remain after annealing, resulting in a completely clean and activated Cold Heading Pure Iron Core surface.
Underlying Copper Plating
A specialized acidic bright copper plating process is used to deposit a dense, strongly bonded copper layer on the iron substrate, serving as an ideal base for subsequent nickel plating for the Iron Core Relay Part.
Surface Nickel Plating
A 5-8μm functional nickel layer is deposited using nickel sulfamate or other low-stress nickel plating processes for Pure Iron Core. Strict control of current density and additives ensures a coating with low stress, low porosity, and high hardness.
Delivery Cycle and Quality Assurance
Leveraging our mature mold system, stable raw material supply chain, and automotive-grade manufacturing processes, we can expedite delivery after project confirmation: free samples in 1-2 days, new mold samples in 20-30 days (including both the new mold and the new sample), and bulk orders in 15-20 days (upon order confirmation and payment). We can also plan production capacity in advance based on annual demand and platform projects to ensure a continuous and stable supply of Relay core cold heading.
Regarding quality management, the factory fully implements the ISO9001:2015 quality management system and the IATF16949 automotive industry quality system for Pure Iron Core. From incoming material inspection and process control to outgoing audit, a traceability management mechanism is implemented, providing long-term, reliable, and mass-producible quality assurance for new energy relay projects.
contact us
If you have any product selection, customization consultation, quotation request, or sample needs, please feel free to contact us. Our professional team will provide you with authoritative technical guidance and efficient service to help you quickly complete procurement decisions and solve application problems.
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