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Cu-Fe-Cr-Mg electromagnetic shielding material and preparation method thereof

A cu-fe-cr-mg, electromagnetic shielding material technology, applied in the direction of magnetic field / electric field shielding, electrical components, etc., can solve the problem of restricting the processing deformation ability of Cu-Fe alloy, prone to liquid phase separation, shrinkage cavity and porosity, etc. problems, achieve low price, suppress segregation, and improve quality

Inactive Publication Date: 2020-12-22
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the Cu-Fe alloy with high iron content is prone to liquid phase separation in the molten state and enters the liquid phase immiscibility zone, and the higher the Fe content, the easier the liquid phase separation
Therefore, during the solidification process, dendritic segregation and uneven distribution of the Fe phase will occur, and the Cu-Fe alloy ingot is also prone to shrinkage and pores.
Such defects severely restrict the subsequent processing and deformation capabilities of Cu-Fe alloys.

Method used

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  • Cu-Fe-Cr-Mg electromagnetic shielding material and preparation method thereof
  • Cu-Fe-Cr-Mg electromagnetic shielding material and preparation method thereof
  • Cu-Fe-Cr-Mg electromagnetic shielding material and preparation method thereof

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preparation example Construction

[0041] The present application also provides a method for preparing the above-mentioned Cu-Fe-Cr-Mg electromagnetic shielding material, comprising the following steps in sequence:

[0042] 1) Ingredients: according to the ratio of ingredients, the raw materials are pure iron, Cu-Cr master alloy, pure magnesium and pure copper;

[0043]2) Melting: Melting in a vacuum furnace, put the prepared pure copper and pure iron into the melting crucible in the vacuum furnace, put the pure magnesium and Cu-Cr intermediate alloy on the feeding tray in the vacuum furnace, and then Close the furnace cover and vacuumize. After the vacuuming is completed, fill it with argon for protection. The melting temperature is 1400°C~1450°C, and the holding temperature is 1330°C~1370°C. After holding for 10min~20min, add pure magnesium and Cu-Cr intermediate alloy. Keep warm for another 3 minutes to 5 minutes;

[0044] 3) Casting: Cast in the vacuum furnace in step 2), set the casting crucible in the el...

Embodiment 1

[0061] Embodiment 1 provides a kind of Cu-Fe-Cr-Mg electromagnetic shielding material, comprises the component of following mass percent: the Fe of 15wt%, the Cr of 0.5wt%, the Mg of 0.5wt%, balance is Cu and unavoidable of impurities.

[0062] The preparation method of the Cu-Fe-Cr-Mg electromagnetic shielding material provided in the above-mentioned embodiment 1 includes the following steps in sequence:

[0063] 1) Ingredients: according to the ratio of ingredients, the raw materials are pure iron, Cu-Cr master alloy, pure magnesium and pure copper;

[0064] In step 1), the mass percent purity of the pure copper, pure iron and pure magnesium is 99.95wt%, and the mass percent of chromium in the Cu-Cr master alloy is 5%;

[0065] 2) Melting: Melting in a vacuum furnace, put the prepared pure copper and pure iron into the melting crucible in the vacuum furnace, put the pure magnesium and Cu-Cr intermediate alloy on the feeding tray in the vacuum furnace, and then Close the fu...

Embodiment 2

[0079] Embodiment 2 provides a kind of Cu-Fe-Cr-Mg electromagnetic shielding material, comprises the component of following mass percentage: the Fe of 7wt%, the Cr of 0.3wt%, the Mg of 0.3wt%, balance is Cu and unavoidable of impurities.

[0080] The preparation method of the Cu-Fe-Cr-Mg electromagnetic shielding material provided in the above-mentioned embodiment 2 includes the following steps in sequence:

[0081] 1) Ingredients: according to the ratio of ingredients, the raw materials are pure iron, Cu-Cr master alloy, pure magnesium and pure copper;

[0082] In step 1), the mass percent purity of the pure copper, pure iron and pure magnesium is 99.95wt%, and the mass percent of chromium in the Cu-Cr master alloy is 5%;

[0083] 2) Melting: Melting in a vacuum furnace, put the prepared pure copper and pure iron into the melting crucible in the vacuum furnace, put the pure magnesium and Cu-Cr intermediate alloy on the feeding tray in the vacuum furnace, and then Close the ...

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Abstract

The invention provides a Cu-Fe-Cr-Mg electromagnetic shielding material. The Cu-Fe-Cr-Mg electromagnetic shielding material comprises the following components, in percentage by mass, including 5%-15%of Fe, 0.01%-0.5% of Cr, 0.01%-0.5% of Mg and the balance of Cu. The invention further provides a preparation method of the Cu-Fe-Cr-Mg electromagnetic shielding material. Elements are prevented frombeing burnt and oxidized by smelting under argon; Fe phases are crushed through electromagnetic stirring, segregation of the Fe phases and formation of large-particle spherical Fe phases are inhibited, and the Fe phases are distributed more uniformly; Mg reduces the solid solubility, pores and shrinkage cavities of Fe in copper; Cr is dissolved in the Fe phases, so that the strength and the thermal stability of the Fe phases are improved; and the tensile strength of a finished alloy reaches 600-1050 MPa, the softening temperature reaches 450 DEG C or above, the electric conductivity reaches 55-70% IACS, and the electromagnetic shielding effect reaches 80-170 dB.

Description

technical field [0001] The invention belongs to the technical field of copper alloy processing, and in particular relates to a Cu-Fe-Cr-Mg electromagnetic shielding material and a preparation method thereof. Background technique [0002] Cu-Fe alloy is a typical metastable immiscible alloy, which will inherit the high electrical and thermal conductivity of its constituent element Cu and the high strength, electromagnetic properties and wear resistance of Fe. Therefore, the Cu-Fe alloy material has two characteristics different from other Cu alloy materials: one is the function of absorbing electric waves, and the other is the electromagnetic wave shielding effect. The characteristics of Cu-Fe alloy make it have a wide range of application prospects in electromagnetic shielding rooms, 5G mobile phone cooling plates, shielding covers, wireless charging circuit boards and mobile phone card holders. In addition, compared with other copper alloys, Cu-Fe alloys also have the adva...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08H05K9/00B23P15/00
CPCB23P15/00C22C1/03C22C9/00C22F1/08H05K9/0081
Inventor 杨斌袁大伟肖翔鹏陈辉明黄浩
Owner JIANGXI UNIV OF SCI & TECH
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