Preparation method of high-performance samarium-cobalt permanent magnetic material

Abstract

The invention discloses a preparation method of a high-performance samarium-cobalt permanent magnetic material. The method at least comprises one of the following steps: raw material preparation, smelting, pulverization, orienting compression, sintering and aging treatment; sintering is that degassing dedusting, pre-sintering, vacuum sintering, protective atmosphere sintering and solution treatment are sequentially carried out on a blank which is obtained by orienting compression; and pre-sintering is pre-sintering at 1050-1180 DEG C for 20-30 minutes. A high-temperature sintering zone is formed by selecting and controlling different vacuum degrees and temperatures in the sintering process of a sintering method in the scheme, a high-vacuum, high-heat and constant-temperature sintering process is formed and a single-phase uniform solid solution samarium-cobalt permanent magnet blank is obtained, so that the quality of a permanent magnet product is improved, the production benefits of a sintering furnace are improved and the yield of the product is improved by 30%.

Description

technical field [0001] The invention relates to a preparation method of a samarium-cobalt permanent magnet material, in particular to a preparation method of a high-performance samarium-cobalt permanent magnet material. Background technique [0002] As samarium cobalt permanent magnets are increasingly used in miniaturized and high-precision instruments and meters, higher requirements are placed on their mechanical properties in terms of accuracy and reliability. As an important functional material, samarium-cobalt rare-earth permanent magnets are mainly devoted to the research of its magnetic properties at home and abroad, but there are few studies on mechanical properties. How to solve the problem of improving the strength and toughness of materials while maintaining their excellent magnetic properties? The problem is becoming more and more challenging. [0003] Samarium cobalt rare earth permanent magnet materials have irreplaceable advantages such as corrosion resistanc...

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Problems solved by technology

[0007] In the preparation of existing samarium-cobalt permanent magnets, as disclosed in CN201010176900, positive pressure sintering is directly carried out under an inert gas atmosphere, while those disclosed in patent technologies such as CN201210008300, CN201510078114, and CN201510931854 are direct vacuum sintering. There are defects in ash content and green body compactness and grain control and product performance improvement

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