A heterogeneous diamond grinding wheel and a method for manufacturing the same

By introducing irregular structures and alternating transition layers into the interface design of diamond grinding wheels, the problem of residual stress accumulation in multi-material laser selective melting additive manufacturing is solved, thereby improving the structural stability and performance of the grinding wheels.

CN118559623BActive Publication Date: 2026-09-11NANJING AGRICULTURAL UNIVERSITY
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Patent Information

Application Number
CN202410766734.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-14
Publication Date
2026-09-11
Estimated Expiration
2044-06-14

AI Technical Summary

Technical Problem

Existing multi-material laser selective melting additive manufacturing technology tends to accumulate residual stress when preparing heterogeneous diamond grinding wheels, leading to decreased structural stability and poor material performance due to mismatched interfacial residual stress.

Method used

An interface structure design is adopted, which introduces irregular interface structures, such as square waveforms, wavy shapes, or sawtooth shapes, between the steel core matrix and the diamond composite working layer. This increases the interface contact area and achieves stress relief through alternating transition layers, thereby reducing the residual stress level.

Benefits of technology

The structural stability of diamond grinding wheels has been improved, the manufacturing process has been simplified, and the overall performance of the grinding wheels has been enhanced through reasonable stress distribution and homogenization.

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Abstract

This invention discloses a heterogeneous diamond grinding wheel with an irregular interface structure and its preparation method. The working layer of the diamond grinding wheel is a metal-based diamond composite material, and the matrix is ​​steel. The preparation method involves designing heterogeneous models such as square waves, sawtooth, wave patterns, and layered structures; using a multi-material additive manufacturing technology based on laser powder bed melting with simultaneous powder spreading and absorption, a stainless steel grinding wheel matrix and a diamond composite grinding wheel working layer are formed on the same plane, achieving 3D printing of the heterogeneous diamond grinding wheel. The heterogeneous diamond grinding wheel prepared by this invention not only achieves simultaneous forming of heterogeneous materials, but also exhibits a high-strength metallurgical bond between the diamond composite working layer and the steel matrix. Furthermore, the irregular interface structure alleviates residual stress at the grinding wheel interface, improving upon the drawback of low bonding strength caused by high residual stress at the interface of heterogeneous diamond grinding wheels.
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