高韧性细粒度PCD刀具及其在转子芯轴表面车削的应用

By combining a high-entropy alloy binder phase with ultrafine diamond, a high-toughness fine-grained PCD tool was developed to solve the problem of high-precision and high-efficiency machining of QT450 ductile iron rotor shafts, achieving a significant improvement in surface quality and lifespan, while reducing equipment investment and production costs.

CN121402663BActive Publication Date: 2026-07-17ZHEJIANG YIFAN AUTOMATION EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG YIFAN AUTOMATION EQUIP CO LTD
Filing Date
2025-11-19
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for machining QT450 ductile iron rotor shafts suffer from problems such as low grinding efficiency, high equipment specialization, high cost, substandard CBN turning surface quality, weak interface bonding of traditional PCD tools, strong chemical affinity, and poor brazing reliability, making it difficult to achieve high-precision and high-efficiency machining.

Method used

The high-toughness, fine-grained PCD tool, consisting of a cemented carbide matrix, a brazing filler layer, and a PCD tip, is designed with a central through-hole structure by combining a high-entropy alloy binder phase with ultrafine diamond. Silver brazing filler is then used to form a reinforced interface and a chemical passivation effect, thereby improving the interfacial bonding strength and reliability.

Benefits of technology

It achieves high-quality machining with a rotor shaft surface roughness Ra≤0.8μm, reduces machining time from 6 minutes to 3 minutes, reduces changeover and debugging time from 3 hours to 0.5 hours, saves hundreds of thousands of yuan in equipment investment, and significantly improves machining efficiency and reliability.

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Abstract

本发明公开了高韧性细粒度PCD刀具及其在转子芯轴表面车削的应用，高韧性细粒度PCD刀具依次包括硬质合金基体、钎料层和PCD刀头，其制备方法包括硬质合金基体的制备、银钎料制备、PCD刀头的制备、钎焊和后处理。本发明通过高熵合金粘结相的界面强化的“钉扎”效应和化学钝化效应，并从钎料配方和刀头结构设计配合实现PCD刀头与基体高可靠、高强度的连接，加工产品Ra≤0.8μm，且寿命和稳定性远超传统PCD和CBN刀具；最终首次实现“以车代磨”且超越现有磨削工艺，由此加工获得产品表面性能高，具有极高的工业应用价值。
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Citation Information

Patent Citations

  • Manufacturing method of PCD cutter

    CN111112966A

  • Hard alloy matrix material for polycrystalline diamond compact and application thereof

    CN112647852A

  • Brazing method for improving welding strength of polycrystalline diamond cutter and hard alloy

    CN120734461A

  • Diamond-based composite material using boron-based binder, production method therefor, and tool constituent using the same

    JP2019006662A