Magnetic abrasive material with core-shell structure and preparation method of magnetic abrasive material

By adopting core-shell structure magnetic abrasives, using the hard phase distribution in the ferromagnetic core and the cladding layer, the problems of high cost, poor performance and short life in the existing magnetic abrasive preparation technology are solved, and higher magnetic permeability and longer service life are achieved.

CN119709125AActive Publication Date: 2025-03-28LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202411919306.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-28
Estimated Expiration
2044-12-25

AI Technical Summary

Technical Problem

The existing magnetic abrasive preparation technology has problems such as high cost, poor performance and short life, and the morphology and particle size are uncontrollable, and the hard phase distribution is unreasonable, which affects the processing quality.

Method used

The magnetic abrasive is adopted for core-shell structure, including a ferromagnetic core and a shell covered on its surface. The shell consists of a transition bonding layer and a hard phase embedded on its surface. The hard phase is uniformly distributed through ball milling and sintering processes and is closely connected to the ferromagnetic.

Benefits of technology

The regular morphology and uniform hard phase distribution of magnetic abrasives are achieved, which significantly improves the magnetic properties and service life of magnetic abrasives and reduces costs.

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Abstract

The invention provides a core-shell structure magnetic abrasive and a preparation method thereof, and belongs to the technical field of magnetic abrasive preparation. According to the core-shell structure magnetic abrasive provided by the invention, through the arrangement of the core-shell structure, the magnetic abrasive has regular morphology and size, and irregular morphology and uncontrollable particle size caused by later processing are avoided; the transition bonding layer is arranged on the surface of the ferromagnet core, so that the hard phase is uniformly distributed on the surface of the ferromagnet, and the problem of uneven distribution of the hard phase is avoided; the transition bonding layer is connected with the hard phase through metallurgical bonding, the ferromagnet and the hard phase are tightly connected together, a magnetic channel is established through the formed intermetallic compound interface diffusion layer, the magnetic dilution effect of the hard phase is weakened, and the magnetic performance of the magnetic abrasive is remarkably enhanced.
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