Processing method of samarium cobalt magnetic steel

Abstract

The invention relates to a processing method of samarium cobalt magnetic steel. The processing method comprises the steps as follows: (1) using an inside diameter slicer to process sintering samarium cobalt work-blank with qualified magnetic performance into a square strip, or using wire electrical discharge machining to form a column, or using trepan boring machining to form a circular long strip; (2) polishing the excircle of the column; (3) sticking the square strip, the column or the circular long strip on a glass plate; (4) fixing the glass plate stuck with the square strip, the column or the circular long strip on the working table of a multi-wire sawing machine; (5) using the multi-wire sawing machine to cut the square strip, the column or the circular long strip into thickness which is less than 2mm, wherein the machining line uses theta 0.12 to 0.25 mm steel wire while using the multi-wire sawing machine to cut; (6) taking out the product after the cutting is finished and using a alkali liquor to heat and boil for 10 to 60 min, and fishing the product out from the alkali liquor, cleaning and drying. The samarium cobalt magnetic steel slice processed by the invention could avoid crack and edge failure, and the product percent of pass is more than 90%.

Description

technical field [0001] The invention relates to a processing method of samarium cobalt magnet steel. Background technique [0002] Sintered samarium cobalt permanent magnet material, since its invention in the 1960s, has been widely used as the permanent magnet material with the best magnetic properties at that time. With the emergence of sintered NdFeB permanent magnet materials in the 1980s, the application of samarium permanent magnet materials has been greatly impacted, and the market share has shrunk greatly. However, sintered samarium cobalt permanent magnet materials have the advantages of high temperature stability, high temperature resistance, corrosion resistance and high magnetic energy product, and are still widely used in the field of high-precision microwave isolators. [0003] The sintered samarium cobalt magnets used in microwave isolators required by mobile phones, communication base stations, radars, etc. are generally thin slices, and the thickness is usu...

AI Technical Summary

Problems solved by technology

Due to the high brittleness and high hardness of sintered samarium cobalt materials, internal circular slicers are mostly used for processing, but when internal circular slicers are used to cut thin slices below 2mm, the products are prone to cracking and corner loss, and the yield of processed products is only 50%~70% %, leading to a significant increase in product cost

The methods of wire electric discharge cutting (commonly known as fast wire cutting), medium wire cutting and slow wire cutting are used to process this type of thin slices. Although the problems of product cracking and corner drop can be solved, these three processing methods not only have low processing efficiency, but also The processing accuracy of fast wire-feeding is poor, and the surface needs to be ground, while the surface of medium-feeding and slow-moving wire is exposed to high-temperature arcs for a long time, and the surface structure is affected to a certain extent, resulting in a decrease in the surface magnetism of thin-sheet magnets.

Images