A kind of preparation method of aluminum magnesium boron abrasive tool and abrasive tool

Abstract

The invention discloses a method for preparing an aluminum-magnesium-boron abrasive tool, which includes mixing and granulating aluminum, magnesium and boron powders, mixing and granulating nickel and aluminum powders, and granulating Al-Mg-B / Ni-Al composite system Powder mixing, heating to trigger self-propagating reaction and other four steps, Al-Mg-B / Ni-Al composite system granulated powder triggers self-propagating reaction under heating conditions, and the temperature generated by self-propagating reaction is sufficient to obtain in-situ Discontinuous distribution of AlMgB 14 The synthesis temperature of the abrasive material needs to improve the utilization rate of heat; at the same time, Ni-Al self-propagating reaction generates Ni-Al intermetallic compound as a binder and AlMgB 14 Abrasive bonding, Ni‑Al intermetallic compounds are mainly NiAl and Ni 3 Represented by Al, it has excellent properties such as high melting point, high strength and high thermal conductivity, and provides the abrasive with the strength, creep resistance and self-sharpening of the bond. This method can abandon processes such as smelting or ultrahigh-pressure high-temperature synthesis, crushing, purification, and sorting in the existing abrasive preparation process, and greatly reduces environmental pollution and intermediate process links that endanger the health of operators.

Description

technical field [0001] The invention belongs to the field of abrasive tool preparation, in particular to a preparation method of an aluminum-magnesium-boron abrasive tool and an abrasive tool. Background technique [0002] High-performance bonded abrasives are essential tools for precision machining of various difficult-to-machine materials (such as superalloys, bearing steels, ceramics, ferrites, semiconductor materials, etc.), and are the key foundation for high-end precision equipment and advanced manufacturing technology. pieces. [0003] The existing abrasive tool manufacturing includes two major links: abrasive preparation and abrasive tool preparation, and the abrasive tool can be manufactured only after the abrasive preparation process is completed. Ordinary abrasives (SiC, Al 2 O 3 ) preparation process includes high temperature smelting, crushing, chemical treatment, drying, grading, magnetic separation and other processes of raw materials; the preparation proce...

AI Technical Summary

Problems solved by technology

Ordinary abrasives (SiC, Al 2 o 3 ) preparation process includes high-temperature smelting of raw materials, crushing, chemical treatment, drying, classification, magnetic separation and other processes; superabrasive (synthetic diamond, cubic boron nitride) preparation process includes ball milling, ultra-high pressure high-temperature synthesis, crushing, physical And chemical purification (strong acid, strong alkali), classification, magnetic separation and other processes, and after the abrasive preparation is completed, it is necessary to prepare the binder (metal, resin, ceramic) and abrasive through mixing, hot pressing sintering, curing and other processes The steps of mold production and abrasive preparation are cumbersome, and high-temperature smelting, ultra-high-pressure high-temperature synthesis, chemical purification (strong acid, strong alkali), chemical treatment, magnetic separation, etc. may cause environmental pollution and endanger the health of operators.

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