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

Abstract

This invention relates to soft magnetic compound materials used in motor magnetic parts, which is characterized by the following: the iron materials and magnetic medium are mixed to get the iron element in the parts with the weight percentage of 85-99.5úÑ, magnetic element of 0.5-15úÑ; the said iron materials and magnetic medium weight percentages are 85íœxa1+ya2íœ99. 5ú”0.5íœxb1+yb2íœ15. The said iron material of iron material and the magnetic materials are the powder alloy to increase the magnetic property.

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...

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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 element plays a very important role in soft magnetic materials, when the content of iron element is less than 85%, its magnetic saturation rate is far Far from meeting the performance requirements of the magnetic permeable component, it directly affects the magnetic performance of the magnetic permeable component, and the magnetic permeability is also low, making it 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

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, and the result will be It brings large changes in the magnetic and mechanical properties of the magnetic permeable member and the deformation of the structural size during forming, which affects the processing quality

At the same time, due to the high content of insulating agents and lubricants, the above 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 components, affecting 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