Vicalloy I Iron-Cobalt-Vanadium Permanent Magnet Alloy
Age-hardenable machinable permanent magnet alloy | Fe-Co-V system
Vicalloy I is an age-hardenable, machinable permanent magnet alloy based on the Fe-Co-V system; it features high saturation magnetic induction, high coercivity, and excellent workability. Unlike traditional brittle permanent magnet materials, Vicalloy I can undergo rolling, drawing, stamping, and other plastic forming processes while in a softer state, achieving its required magnetic properties through a final heat treatment; consequently, it is particularly well-suited for fine wires, strips, and precision magnetic components.
Vicalloy I is primarily used in electromagnetic devices, hysteresis motors, hysteresis brakes, hysteresis clutches, and precision magnetic components that require stable hysteresis characteristics. For fine-wire products requiring specific hysteresis properties-such as Wiegand elements-customized supplies are available based on customer specifications regarding dimensions, cold-working levels, and final magnetic performance requirements.
Lork Group supplies Vicalloy I (2J10) in the form of wire, strip, rod, and other wrought products tailored to customer requirements, with controlled chemical composition, dimensional tolerances, cold-working and heat-treatment states, and magnetic performance specifications.
chemical component
| element | Content(%) |
| Co | 51.00-53.00 |
| Fe | rest |
| V | 9.50-10.50 |
| Ni | ≤0.70 |
| Si | ≤0.50 |
| Mn | ≤0.50 |
| P | ≤0.025 |
| S | ≤0.02 |
| C | ≤0.12 |
Magnetic property
| Coercivity (Hμ) | 14.32 – 18.30 kA/m |
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Saturation magnetic flux density (Bs) |
0.9 – 1.20 T |
| Hysteresis loss(Pμ) | ≥30 kJ/m³ |
| Electrical Resistivity | 0.71 μΩ·m |
Physical Properties
| Condition | Solution-annealed state |
| Tensile Strength | ≥700 MPa |
| Yield Strength(0.2%) | 450–700 MPa |
| Elongation | ≥15% |
The data is for reference only; please refer to MTC for the definitive figures.
Applicable working conditions
Temperature Conditions: Suitable for electromechanical equipment operating within a normal to moderate temperature range. The material achieves very high hardness after aging treatment; however, excessive operating temperatures should be avoided, as they may compromise the stability of magnetic properties. The specific upper temperature limit should be assessed based on actual operating conditions.
Atmosphere and Medium Conditions: Exhibits good corrosion resistance in atmospheric environments and does not rust in air. Suitable for standard industrial and instrumentation environments.
Stress Conditions: Suitable for permanent magnet and hysteresis applications involving moderate magnetic fields. In the solution-treated state, the alloy has excellent ductility, allowing cold-forming processes such as punching, shearing, bending, and drawing; however, after aging and hardening, only grinding is feasible.
No plastic processing may be performed after age hardening; the design of magnetically anisotropic materials must account for the influence of the rolling or drawing direction on magnetic properties.
Heat Treatment
Vicalloy I (2J10) is typically processed in the solution-treated state to maintain good ductility and formability. Following operations such as drawing, rolling, stamping, bending, or machining, a final aging treatment is performed to induce precipitation hardening and achieve the desired permanent magnetic properties. Publicly available data indicate that the final aging of Vicalloy I is generally conducted between 600°C and 700°C, with a typical holding time of approximately 2 to 6 hours; historical studies have also employed a process route involving quenching from approximately 1200°C followed by aging at 600°C.
Specific parameters-including solution treatment temperature, cooling method, aging temperature, and holding time-should be optimized based on product dimensions, the cold-worked state, and the target magnetic properties.
FAQ
Information You Might Want to Know About Vicalloy I Alloy
What is the relationship between Vicalloy I and 2J10?
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Vicalloy I is a US commercial trade name, while 2J10 is a Chinese national standard grade (GB/T 14988-2008). Both belong to the same class of machinable iron-cobalt-vanadium permanent magnet alloys, with essentially identical chemical compositions and magnetic properties.
What is the difference between Vicalloy I and Vicalloy II?
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Vicalloy I is in the hot-worked state (magnetically isotropic) with a maximum energy product of approximately 8 kJ/m³. Vicalloy II is in the cold-worked state (magnetically anisotropic); it achieves a higher energy product (up to 24 kJ/m³) through 75%–95% cold deformation.
Can Vicalloy I be used immediately after delivery, or does it require heat treatment?
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It cannot be used directly. The magnetic properties of Vicalloy I must be activated via an aging treatment at 600–700°C for 2–6 hours after the final component has been machined. After aging, the hardness reaches HRC 58–62, allowing only for grinding operations.
Why is heat treatment important for Vicalloy I?
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Heat treatment affects the alloy's internal precipitated microstructure, thereby significantly influencing coercivity, remanence, and overall hysteresis performance. Consequently, the final properties of Vicalloy I are determined not only by chemical composition but also by the degree of cold work and the specific aging parameters.
What information should be provided when requesting a quotation?
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It is recommended to provide the material grade, product form, dimensions, tolerances, quantity, delivery condition, target magnetic properties, heat treatment requirements, testing requirements, and applicable standards. For specialized magnetic components, it is also advisable to provide the target hysteresis loop or key parameters such as Hc, Br, and Bs.
Lork Group
Marketing Operations Department
Email: claire@lorkgroup.com
WhatsApp: +86 19937075488
Hot Tags: Vicalloy I, 2J10, Fe-Co-V alloy, iron-cobalt-vanadium permanent magnet alloy, semi-hard magnetic alloy, hysteresis alloy, magnetic hysteresis motor rotor material, Wiegand wire
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