SU851504A1

SU851504A1 - Method of magnetization of permanent magnets

Info

Publication number: SU851504A1
Application number: SU792805954A
Authority: SU
Inventors: Сергей Евгеньевич Виноградов; Нина Александровна Маркелова
Original assignee: Предприятие П/Я А-1216
Priority date: 1979-07-30
Filing date: 1979-07-30
Publication date: 1981-07-30

Description

Изобретение относится к производству постоянных магнитов и может быть использовано для намагничивания магнитов из сплавов РЗМ-Со (редко- _ земельный металл - кобальт). ⁵ The invention relates to the production of permanent magnets and can be used to magnetize magnets from REM-Co alloys (rarely - ground metal - cobalt). ⁵

Известный способ намагничивания постоянных магнитов, заключающийся в воздействии на магнит импульсным магнитным полем. Использование импульсных полей объясняется тем, что получение импульсных магнитных полей, требуемой напряженности, значительно проще, чем постоянных магнитных полей той же напряженности £1} . 15A known method of magnetization of permanent magnets, which consists in exposing the magnet to a pulsed magnetic field. The use of pulsed fields is explained by the fact that obtaining pulsed magnetic fields of the required strength is much simpler than constant magnetic fields of the same strength £ 1}. fifteen

Недостатком известного способа является низкий выход годных магнитов, особенно тонкослойных, при намагничивании.The disadvantage of this method is the low yield of magnets, especially thin-layer, with magnetization.

Цель изобретения - повышение вы- 20 хода годных магнитов.The purpose of the invention is to increase the yield of suitable magnets.

Поставленная цель достигается тем, что в способе намагничивания постоянных магнитов, в частности тонкослойных магнитов, из соединений 25 редкоземельный элемент-кобальт, включающий намагничивание^ импульсным магнитным полем, перед импульсным намагничиванием постоянные магниты подвергают воздействию магнитным 30 полем, плавно возрастают со скоростью от до 8*10^ Э/с, до величины 8-16 кЭ, причем напряженность импульсного магнитного поля выбирают от 70 до 140 кЭ при скорости его возрастания от 10·10⁶ до 60«60^д Э/с.This goal is achieved by the fact that in the method of magnetization of permanent magnets, in particular thin-layer magnets, of compounds 25 of the rare-earth element-cobalt, which includes magnetization by a pulsed magnetic field, before pulsed magnetization, the permanent magnets are exposed to a magnetic 30 field, gradually increase from a speed of up to 8 * 10 ^ E / s, up to a value of 8-16 kOe, and the intensity of the pulsed magnetic field is selected from 70 to 140 kOe at a rate of increase from 10 · 10 ⁶ to 60 «60 ^d E / s.

Пример 1. 25 магнитов размером 15х 1, сложенных стопкой, помещают в оправке между полюсами электромагнита. Поле возрастает со скоростью 5 кЭ/c до величины 10 кЭ. После этого поле уменьшается до нуля, магниты извлекают из межполюсного зазора электромагнита.и намагничивают импульсным полем, напряженностью ₍(максимальной) 5600 кА/м (70 кэ) / скорость нарастания импульса 10·10⁶ Э/с„ Ни один .магнит не тр₽снул, выход годных 100%.Example 1. 25 magnets of size 15x1, folded in a stack, are placed in a mandrel between the poles of an electromagnet. The field increases at a rate of 5 kOe / s to 10 kOe. After this, the field decreases to zero, the magnets are removed from the inter-pole gap of the electromagnet, and magnetized by a pulsed field with a strength ₍ (maximum) of 5600 kA / m (70 ke) / pulse rise rate of 10 · 10 ⁶ E / s “None. Magnet does not ₽ asleep, yield 100%.

Пример 2. Операции, аналогичные примеру 1, проделаны после первоначального намагничивания в поле 8 кЭ при скорости возрастания поля 2 кЭ/c, напряженность импульсного поля 11200 кА/м (140 кЭ)) скорость возрастания напряженности поля 60·10^& Э/с. Выход годных магнитов 100%.Example 2. Operations similar to example 1 were performed after the initial magnetization in a field of 8 kOe at a rate of increase of a field of 2 kOe / s, the intensity of a pulse field of 11,200 kA / m (140 kOe)), the rate of increase of a field strength of 60 · 10 ^& E / s. The yield of magnets is 100%.

При мер 3. Операции, аналогичные примеру 1, проделаны после первоначального намагничивания в поле 8 Эк при скорости возрастания поля 8 кЭ/с; напряженность импульсного поля (максимальное) 8000 кА/м (100 кЭ) скорость возрастания напряженности 26«10^йЭ/с. Выход годных магнитов 100% (из партии 25 магнитов) .Example 3. Operations similar to example 1 were performed after the initial magnetization in a field of 8 Ek at a field increasing rate of 8 kO / s; the intensity of the pulsed field (maximum) 8000 kA / m (100 kOe) the rate of increase in tension 26 "10 ^th E / s. The yield of magnets is 100% (from a batch of 25 magnets).

Пример 4. Операции, аналогичные примеру 1, проделаны после первоначального намагничивания в поле 15 кЭ при скорости возрастания поля 8 кЭ/c напряженность импульсного поля (максимальное) 6400 кЭ/м (80 кЭ)) скорость возрастания напряженности поля 12^10^ Э/с. Выход годных магнитов 100% (из партии 26 магнитов) .Example 4. Operations similar to example 1 were performed after the initial magnetization in a field of 15 kOe at a field growth rate of 8 kOe / s pulsed field strength (maximum) 6400 kOe / m (80 kOe)) field strength increase rate 12 ^ 10 ^ E / from. The yield of magnets is 100% (from a batch of 26 magnets).

Пример 5. Операции, аналогичны примеру 1, проделаны после первоначального намагничивания в поле 16 кЭ при скорости возрастания 2 кЭ/c; максимальная напряженность импульсного поля 6000 кА/м (72 кЭ), скорость возрастания напряженности поля 30·10^й Э/с. Выход годных магнитов 100%.Example 5. Operations similar to example 1 were performed after the initial magnetization in a field of 16 kOe at an increase rate of 2 kOe / s; the maximum intensity of the pulse field is 6000 kA / m (72 kOe), the rate of increase of the field strength is 30 · 10 ^th E / s. The yield of magnets is 100%.

Использование предлагаемого.способа обеспечивает увеличение выхода годных магнитов от 60 до 100%.Using the proposed method provides an increase in the yield of magnets from 60 to 100%.

Claims

The invention relates to the production of permanent magnets and can be used to magnetize magnets from REM-Co alloys (rare earth metal — cobalt). There is a known method of magnetizing permanent magnets, which involves exposing a magnet to a pulsed magnetic field. The use of pulsed fields is explained by the fact that obtaining pulsed magnetic fields, the required strength, is much simpler than constant magnetic fields of the same voltage 1. The disadvantage of this method is the low yield of magnets, especially THIN-LAYER, with magnetization. The purpose of the invention is to increase the yield of magnets. The goal is achieved by the fact that in the method of magnetization of permanent magnets, in particular thin-layer magnets, a rare-earth cobalt element is connected, which includes magnetization by a pulsed magnetic field, before pulsed magnetization permanent magnets are exposed to a magnet by a field, gradually increasing with speed from to e / s, to a value of 8–16 kOe, and the intensity of a pulsed magnetic field is chosen from 70 to 140 kOe at a rate of its increase from 10,100 to 60–60 e / s. Example 1. 25 15X 1 magnets stacked in a pile are placed in a mandrel between the pole of an electromagnet. The field increases with a speed of 5 kOe / s to a value of 10 kOe. After that, the field is reduced to zero, the magnets are removed from the interpolar gap of the electromagnet. And they are magnetized by a pulsed field, strength, (maximum) 5600 kA / m (70 ke)., The pulse buildup rate is 10 10 O / s, no one has cracked , yield of 100%. Example

2. Operations analogous to Example 1 were carried out after the initial magnetization in the field CE at a speed of increasing field 2 kOe / s, the intensity of a pulsed field 11200 kA / m (140 kOe) the speed of increasing tension of field E / s. The yield of magnets 100%. Etc. and measures

3. Operations analogous to Example 1 were carried out after the initial magnetization in the field of 8 Ek at a rate of increase of the floor of 8 kOe / s; impulse field strength (maximum) 8000 kA / m (100 kOe); rate of increase in tension 2b "10 O / s. An exit, suitable magnets of 100% (from a batch of 25 magnets). Example

4. Operations analogous to Example 1 were performed after the initial magnetization in a field of 15 kOe at a SPEED increase of the field of 8 kOe / s. The intensity of the pulsed field (maximum) 6400 kOe / m (80 kOe); The rate of increase in tension is 12-10 O / s. The yield of magnets is 100% (from a batch of 26 magnets). Example

5. Operations, similar to example 1, were performed after the initial magnetization in the field of 16 kOe at a rate of increase of 2 kOe / s; The maximum intensity of the pulsed field is 6000 kA / m (72 kOe), the rate of increase in the intensity of the field is 30-10 O / s. The yield of magic tov 100%. Using the proposed method provides an increase in the yield of magnets from 60 to 100%. Claims The method of magnetizing permanent magnets, in particular thin-layer magnets, from rare-cobalt rare-earth compounds, including Hc # 1 magnetization by a pulsed magnetic field, characterized in that, in order to increase the yield of magnets, the permanent magnets are subjected to magnetic effects in order to improve the yield of magnets , gradually increasing with a speed from 2-10 to O / s to a value of 8–16 kOe, with the intensity of a pulsed magnetic field being chosen from 70 to 140 kOe at a rate of its increase from 10 to 10 o to OU / s. Sources of information taken into account during the examination 1. Bochkarev OV Impulse magnetization of permanent magnets. Electrical Engineering, 1975, 8, p. 53-59.