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Method for preparing manganese-aluminium hard-magnetic alloy

A hard magnetic alloy and alloy technology, applied in the field of manganese-aluminum hard magnetic alloy manufacturing, can solve the problem of high magnetic properties, achieve the effects of improved magnetic properties, low cost of raw materials, and easy operation and production

Active Publication Date: 2010-03-31
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Application Information

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Problems solved by technology

Through the above process, only materials with slightly higher magnetic properties than hard ferrite can be produced

Method used

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  • Method for preparing manganese-aluminium hard-magnetic alloy
  • Method for preparing manganese-aluminium hard-magnetic alloy
  • Method for preparing manganese-aluminium hard-magnetic alloy

Examples

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example 1

[0038] First determine the molecular formula of the manganese-aluminum alloy, calculate the mass percentage of each element (as shown in Table 1) and weigh the corresponding weight (raw material purity: 99wt% or higher). The alloy raw materials smelted in a vacuum induction furnace are used to make ingot billets.

[0039] Using rapid quenching equipment (such as figure 1 ), the molten alloy is loaded into the crucible 1, the heating source 2 provides heat to the molten state, pours it on the water-cooled copper roller 3 rotating at a peripheral speed of 30-50 m / s, and the cooling rate is close to 10 6 °C / sec. A collection bucket or collection tank can be set in the direction of the alloy thin strip injection. The thickness of the thin alloy strip is about 20-50 μm. The X-ray diffraction pattern of the alloy powder is as figure 2 As shown, when the line speed of the copper roll is 40 m / s, the alloy powder presents an amorphous structure; when the line speed of the copper r...

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Abstract

The invention provides a method for preparing manganese-aluminium hard-magnetic alloy, which is characterized by: (1) heating the raw material alloy comprising transition metal elements, rare earth elements and non-metallic elements to obtain melting alloy; (2) rapidly quenching in a speed of 1*10<5>-1*10<6> DEG C / s to obtain an alloy band; and (3) hot working the alloy powder under the protectionof vacuum / inert atmosphere. The method has advantages of low cost increase on raw material compared with the initial prescription, comprehensive utilization of rapid quenching and hot working, greatincrease of magnetic property of the products and easy operation and production.

Description

technical field [0001] The invention relates to a method for manufacturing a manganese-aluminum hard magnetic alloy, which belongs to the technical field of magnetic materials and powder metallurgy. The products manufactured by the manufacturing method can be used for magnetic elements in electroacoustic conversion or electromechanical transmission devices. Background technique [0002] Ordinary civilian products such as audio, motor or magnetic chuck are in great demand, and quite a few of them do not require high magnetic properties of hard magnetic components, but pay more attention to the ratio of magnetic properties to unit price. Usually, low-cost hard magnetic materials mainly use barium ferrite and strontium ferrite. , mechanical post-processing, surface coating and magnetization processes to obtain the final product. In addition, the field of applied technology has been seeking a material that can balance between high-performance and high-priced rare earth hard mag...

Claims

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Application Information

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IPC IPC(8): C22C1/02H01F1/053
Inventor 胡元虎林旻闫阿儒李东张元宏
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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