阅读说明：本技术 一种利用回收非晶材料制备非晶磁粉芯的热处理方法 (Heat treatment method for preparing amorphous magnetic powder core by utilizing recycled amorphous material ) 是由 顾伟 张志键 施闻博 杨佳泉 顾雪军 于 2019-11-08 设计创作，主要内容包括：本发明提供一种利用回收非晶材料制备非晶磁粉芯的热处理方法,将回收的非晶材料粉末压制成非晶磁粉芯,送入300℃的热处理炉中保温30min进行预处理,然后在30min内将炉温至410-460℃,保温30min,保温结束后取出非晶磁粉芯,自然冷却。本发明有助于非晶磁粉芯中晶粒长大,并能更好地消除内应力,提高磁导率；不会导致绝缘介质的分解及绝缘薄膜的破坏,可获得更高的磁导率和更低的损耗,以及优良的软磁性能及机械物理性能,应用于电力电子领域,能满足电子产品向高精度、高灵敏度和大容量、小型化方向发展的需要。(The invention provides a heat treatment method for preparing an amorphous magnetic powder core by utilizing a recovered amorphous material, which comprises the steps of pressing the recovered amorphous material powder into the amorphous magnetic powder core, sending the amorphous magnetic powder core into a heat treatment furnace at 300 ℃ for heat preservation for 30min for pretreatment, then keeping the furnace temperature to 410-460 ℃ within 30min for heat preservation for 30min, taking out the amorphous magnetic powder core after the heat preservation is finished, and naturally cooling. The invention is beneficial to the growth of crystal grains in the amorphous magnetic powder core, can better eliminate the internal stress and improve the magnetic conductivity; the magnetic material can not cause the decomposition of an insulating medium and the damage of an insulating film, can obtain higher magnetic conductivity, lower loss, excellent soft magnetic performance and mechanical and physical performance, is applied to the field of power electronics, and can meet the requirements of electronic products on the development of high precision, high sensitivity, large capacity and miniaturization.)

1. A heat treatment method for preparing amorphous magnetic powder core by utilizing recovered amorphous material is characterized in that recovered amorphous material powder is pressed into amorphous magnetic powder core, the amorphous magnetic powder core is sent into a heat treatment furnace with the temperature of 300 ℃ for heat preservation for 30min for pretreatment, then the furnace temperature is increased to 410 and 460 ℃ within 30min for heat preservation for 30min, and after the heat preservation is finished, the amorphous magnetic powder core is taken out and naturally cooled.

2. The method as claimed in claim 1, wherein the furnace temperature is increased to 415-450 ℃ within 30min, and the temperature is maintained for 30 min.

3. The method as claimed in claim 1, wherein the furnace temperature is increased to 435-440 ℃ within 30min after the pre-treatment, and the temperature is maintained for 30 min.

Technical Field

The invention relates to the technical field of power electronics, in particular to a heat treatment method for preparing an amorphous magnetic powder core by utilizing a recycled amorphous material.

Background

In recent years, with the rapid development of power electronics and information industries, electronic devices and devices are becoming higher in frequency, smaller in size, and higher in current, and how to reduce the high-frequency loss of the magnetic powder core and maintain good dc bias performance becomes an increasingly critical issue in research and application of the magnetic powder core. Among a plurality of magnetic powder core types, the iron-based amorphous magnetic powder core has excellent magnetic properties such as higher magnetic conductivity, high direct current bias performance, lower loss and the like, has incomparable advantages in many application occasions, is an important development direction of magnetic powder core materials, and gets more and more extensive attention of scientific researchers. At present, how to improve the magnetic conductivity of the amorphous magnetic powder core and reduce the loss of the amorphous magnetic powder core so that the amorphous magnetic powder core obtains more excellent soft magnetic performance and mechanical and physical properties is a key technical means which needs to be broken through by technicians in the field.

The mixture powder is extruded by a press in the pressing process, the stress exists in the magnetic powder core, the stress influences the performance of the magnetic powder core, and the purposes of eliminating the internal stress and improving the performance of the magnetic powder core can be achieved by annealing the magnetic powder core. The magnetic field heat treatment process is a critical factor in the powder core preparation process, and the main purpose of the magnetic field heat treatment is to induce magnetic anisotropy in a sample by using magnetic field annealing, because the magnetic anisotropy is a function of annealing in the presence of an external magnetic field. The heat treatment temperature plays a decisive role in magnetic performance, the increase of the temperature is beneficial to the growth of crystal grains, the internal stress can be better eliminated, and the magnetic conductivity is improved; however, the insulation layer is "burned" due to too high temperature, the eddy current loss is increased due to the decomposition of the insulation medium and the damage of the insulation film, and the quality factor of the powder core is sharply reduced. Therefore, it is necessary to explore a reasonable heat treatment temperature, study the influence of annealing temperature, annealing time and annealing atmosphere on the binder and the amorphous powder core, and obtain higher magnetic permeability and lower loss so as to obtain excellent soft magnetic properties and mechanical and physical properties.

Disclosure of Invention

The invention aims to provide a heat treatment method for preparing an amorphous magnetic powder core by utilizing a recycled amorphous material, so that the amorphous magnetic powder core has higher magnetic conductivity and lower loss, thereby obtaining more excellent soft magnetic performance and mechanical and physical properties, being applied to the field of power electronics, and being capable of meeting the requirements of electronic products on development towards high precision, high sensitivity, large capacity and miniaturization.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a heat treatment method for preparing amorphous magnetic powder core by utilizing recycled amorphous material comprises the following steps: pressing the recovered amorphous material powder into an amorphous magnetic powder core, sending the amorphous magnetic powder core into a heat treatment furnace at 300 ℃ for heat preservation for 30min for pretreatment, then heating the furnace to 410-460 ℃ within 30min, preserving the heat for 30min, taking out the amorphous magnetic powder core after the heat preservation is finished, and naturally cooling.

According to the scheme, after the pretreatment, the furnace temperature is increased to 415-450 ℃ within 30min, and the temperature is kept for 30 min.

According to the scheme, after the pretreatment, the furnace temperature is kept at 440 ℃ of 435 ℃ within 30min, and the temperature is kept for 30 min.

The invention has the beneficial effects that:

the heat treatment method of the invention is beneficial to the growth of crystal grains in the amorphous magnetic powder core, can better eliminate the internal stress and improve the magnetic conductivity; the magnetic material can not cause the decomposition of an insulating medium and the damage of an insulating film, can obtain higher magnetic conductivity, lower loss, excellent soft magnetic performance and mechanical and physical performance, is applied to the field of power electronics, and can meet the requirements of electronic products on the development of high precision, high sensitivity, large capacity and miniaturization.

Detailed Description

The technical solution of the present invention will be described with reference to the following examples.