Soft-magnetic composite material for magnetic conduction component and process for preparing magnetic conduction component

Abstract

This invention provides one motor magnetic parts soft magnetic compound materials, which are characterized by the following: comprising iron materials, magnetic medium and additive with their percentage of 82-99.úÑú¼0.5-13úÑú¼0.5-5úÑ; the said iron material is of iron base materials and the magnetic medium is of the powder alloy to increase the part magnetism; the additive is isolation agent or adhesive agent or lubrication or modified agent for lone usage or combination. The magnetic part process comprises the steps of mixing, shaping, solidifying and stainless process.

Description

Technical field: [0001] The invention relates to a soft magnetic composite material, in particular to a soft magnetic composite material constituting a magnetic conduction member in an electric motor and a production process for manufacturing the magnetic conduction member from it. Background technique: [0002] With the development of society, motors and electrical appliances with magnetic conductive components have been widely used in daily life. At present, most of the magnetic components in these electrical appliances are silicon steel sheets, which are widely used in low- and medium-frequency transformers and motor cores, especially power frequency transformers. Silicon steel is characterized by having the highest saturation magnetic induction (above 2.0T) among commonly used soft magnetic materials, so when used as a transformer core, it can work at a very high working point (such as a working magnetic induction value of 1.5T). However, silicon steel also has the larg...

AI Technical Summary

Problems solved by technology

[0006] However, the above method has a relatively obvious weakness, that is, the direct cost of production is high, because:

[0007] 1) Due to the irregular shape of various components, the utilization rate of materials is relatively low, and the waste produced is more;

[0008] 2), silicon steel sheets are expensive;

[0009] 3), waste is not easy to recycle

[0010] The Chinese Patent Office has published an invention patent application (application number: 03128171.0, publication number CN 1461089A) of "Motors and Appliances Made of Soft Magnetic Composite Materials". Composed of pure iron powder, insulating agent and lubricant, its main raw material is only pure iron powder, the range of raw material selection is narrow, and the price is very expensive. The market price is currently as high as 7,000 yuan / ton, and the cost is relatively high. The corresponding production costs of motors and electrical appliances are also very high

At the same time, the proportion of pure iron powder in soft magnetic materials is 80%-90%. Since the content of iron plays an important role in soft magnetic materials, when the content of iron raw materials is lower than 90%, its magnetic saturation rate is far away. It cannot meet the performance requirements of the magnetic permeable component, directly affects the magnetic performance of the magnetic permeable component, and the magnetic permeability is also low, so it is difficult to adapt to the current continuously improving product quality requirements and market demand

In addition, when the magnetic-permeable component product is formed, the mixture "needs to be sintered in a heating furnace at 1100-1300°C for 2-3 hours" to meet its design requirements. Therefore, a high-temperature heating furnace with high equipment requirements must be used for processing. can only be realized, and the energy cost of heating to such a high temperature will be huge

At the same time, due to the large proportion of insulating agent and lubricant in the magnetic conductive member, the size shrinkage is quite severe during forming, and under such high-temperature process environment conditions, the physical and chemical changes of the insulating agent and lubricant are greater. As a result, there will be large changes in the magnetic and mechanical properties of the magnetically conductive member and the deformation of the structural size during forming, which will affect the processing quality.

Due to the large content, the above-mentioned substances cannot be completely vaporized when heated to high temperature during the sintering process, and some of them will still remain in the magnetic conductive member, which will affect the performance of the product

In addition, after the above substances undergo chemical changes, other compounds that cannot be gasified or dissolved will remain in the sintering furnace, which often needs to be cleaned, which is troublesome and time-consuming