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Efficient and environment-friendly samarium-cobalt processing technology

A processing technology, samarium cobalt technology, applied in the field of efficient and environmentally friendly samarium cobalt processing technology, can solve the problems of inconvenient use of samarium cobalt processing technology, achieve the effect of reducing labor intensity and environmental pollution, improving production efficiency and material utilization rate

Inactive Publication Date: 2020-06-05
杭州蒙图机械设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency and environmentally friendly samarium-cobalt processing technology, which has the advantage of being easy to use and solves the problem of inconvenient use of the traditional samarium-cobalt processing technology

Method used

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  • Efficient and environment-friendly samarium-cobalt processing technology
  • Efficient and environment-friendly samarium-cobalt processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]A high-efficiency and environmentally friendly samarium-cobalt processing technology includes the following steps: Step 1: Smelting: Put the samarium-cobalt raw material into a vacuum medium-high frequency induction furnace for smelting. into the mold to obtain the alloy billet; step 2: powder making: the alloy billet is crushed by an ultra-high pressure water jet without abrasives in an inert environment, and after being crushed, hydrogen crushing and ball milling are carried out after multiple deionized water washes to obtain magnetic powder; step 3: Forming: The magnetic powder is preliminarily pressed into shape under a balanced magnetic field, and then processed by a cold isostatic press to obtain a green body; Step 4: Green body processing: includes the following steps: (a) Demagnetization treatment: through a demagnetizer Demagnetize the pressed green body to ensure that the zero surface magnetism at the center of the green body is ≤10Gs; (b) Processing environment...

Embodiment 2

[0046] In Example 1, the following steps are added:

[0047] In step 1, the melting temperature of the vacuum medium and high frequency induction furnace is 1500-2000° C., and the mold adopts a water-cooled copper mold.

[0048] A high-efficiency and environmentally friendly samarium-cobalt processing technology includes the following steps: Step 1: Smelting: put the samarium-cobalt raw material into a vacuum medium-high frequency induction furnace for melting, and after the melting is completed, continue to keep warm and refine at a temperature of 1450°C for 5 minutes, and then pour into the mold to obtain the alloy billet; step 2: powder making: the alloy billet is crushed by an ultra-high pressure water jet without abrasives in an inert environment, and after being crushed, hydrogen crushing and ball milling are carried out after multiple deionized water washes to obtain magnetic powder; step 3: Forming: The magnetic powder is preliminarily pressed into shape under a balanc...

Embodiment 3

[0050] In Example 2, the following steps are added:

[0051] In step 2, the broken size of the alloy billet is less than 10mm, the water pressure of the high-superpressure water jet is greater than 250Mpa, and the cutting water adopts potassium nitrate low-temperature freezing saturated solution; in step 2, the ball mill is carried out under the protection of an inert gas using a corundum ball mill, and the magnetic powder after ball milling The particle size is 3.0-5.0um.

[0052] A high-efficiency and environmentally friendly samarium-cobalt processing technology includes the following steps: Step 1: Smelting: Put the samarium-cobalt raw material into a vacuum medium-high frequency induction furnace for smelting. into the mold to obtain the alloy billet; step 2: powder making: the alloy billet is crushed by an ultra-high pressure water jet without abrasives in an inert environment, and after being crushed, hydrogen crushing and ball milling are carried out after multiple dei...

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Abstract

The invention discloses an efficient and environment-friendly samarium-cobalt processing technology which comprises the steps of 1 smelting: putting a samarium-cobalt raw material into a vacuum medium-high frequency induction furnace for smelting, continuing to preserve heat and refine for 5 minutes at the temperature of 1430 to 1450 DEG C after the smelting is finished, and then pouring into a mold to obtain an alloy blank; 2 pulverizing: crushing the alloy blank through an abrasive-free ultrahigh-pressure water jet cutter in an inert environment, carrying out hydrogen decrepitation and ballmilling after the alloy blank is crushed and washed with deionized water many times to acquire magnetic powder; and 3 compression molding: carrying out primary compression molding on the magnetic powder under a balanced magnetic field, then carrying out machining through a cold isostatic press to acquire a green body. According to the invention, green body processing procedure is added on the basis of a traditional production process; the production efficiency and the material utilization rate can be improved, meanwhile, no waste liquid, waste gas or waste residues are generated; the labor intensity and environmental pollution are reduced; and use by people is facilitated.

Description

technical field [0001] The invention relates to the technical field of samarium-cobalt processing, in particular to an efficient and environment-friendly samarium-cobalt processing technology. Background technique [0002] Samarium cobalt magnet is a kind of rare earth magnet. It is a kind of magnetic tool material made of samarium, cobalt and other metal rare earth materials through proportioning, melting into alloy, crushing, pressing and sintering. It has high magnetic energy product , extremely low temperature coefficient, the maximum working temperature can reach 350°C, and the negative temperature is not limited. When the working temperature is above 180°C, its maximum magnetic energy product), coercivity, temperature stability and chemical stability all exceed those of NdFeB Permanent magnet materials have strong corrosion resistance and oxidation resistance; so they are widely used in aerospace, national defense, microwave devices, communications, medical equipment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/055
CPCH01F1/0556H01F1/0557H01F41/0266
Inventor 夏雨辰
Owner 杭州蒙图机械设计有限公司