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Preparation method of high-purity fine-grained pure copper material for medicine-type cover

A high-purity, medicine-shaped mask technology, which is applied in the field of preparation of high-purity fine-grained pure copper materials for medicine-shaped masks, can solve problems such as uneven grain size and many impurity elements, and achieve stable material performance and high material yield. High efficiency, friction reduction effect

Active Publication Date: 2020-04-07
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercial pure copper materials such as TU1, T2, and T2A are not developed according to the special performance of the drug-type cover, and the penetration ability is affected by many impurity elements and uneven grain size.

Method used

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  • Preparation method of high-purity fine-grained pure copper material for medicine-type cover
  • Preparation method of high-purity fine-grained pure copper material for medicine-type cover
  • Preparation method of high-purity fine-grained pure copper material for medicine-type cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a high-purity fine-grained pure copper material for a drug-type cover is carried out according to the following steps:

[0032] (1) Preparation of blanks: commercial T2 pure copper rods are used, the size specification is φ120mm, and the average grain size is about 250μm (such as figure 1 ), the content of impurity elements is shown in Table 1. Use sawing to cut the material to a length of 500mm to remove oxides and oil on the surface.

[0033] Table 1 Content of impurity elements in T2 copper rods

[0034] grade P Bi Sb As Fe Ni sn S 0 Pb Zn sum T2 60 40 30 20 50 200 20 40 380 120 40 1000

[0035] (2) Vacuum electron beam melting: use an electron beam melting furnace with a power of 900kw for secondary electron beam melting and purification, the copper crystallizer is φ250mm, and the vacuum degree of the melting chamber is ≥2×10 -3 Pa, the primary smelting speed is 100kg / h, the ingot spinning...

Embodiment 2

[0044] A preparation method of a high-purity fine-grained pure copper material for a drug-type cover is carried out according to the following steps:

[0045] (1) Preparation of the billet: commercial T3 pure copper rods are used, the size specification is φ90mm, and the average grain size is about 130μm (such as image 3 ), the content of impurity elements is shown in Table 3. Use sawing to cut the material to a length of 800mm to remove oxides and oil stains on the surface.

[0046] Table 3 The content of impurity elements in T3 copper rods (×10 -6 )

[0047]

[0048]

[0049] (2) Vacuum electron beam melting: use an electron beam melting furnace with a power of 900kw for secondary electron beam melting and purification, the copper crystallizer is φ250mm, and the vacuum degree of the melting chamber is ≥2×10 -3 Pa, the primary smelting speed is 80kg / h, the ingot rotating and drawing speed is 2mm / min; the secondary melting speed is 100kg / h, and the ingot rotating and...

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Abstract

The invention provides a preparation method of a high-purity fine-grain pure copper material for charge liners. The preparation method comprises the steps of smelting and recrystallizing heat treatment, wherein smelting belongs to vacuum electron-beam smelting, and the vacuum degree is greater than or equal to 2*10<-3>Pa. The pure copper material prepared through the method is low in impurity content, fine and uniform in crystal grain, good in performance consistency and capable of remarkably improving the penetration performance of the armor penetration warhead charge liners.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a method for preparing a high-purity fine-grained pure copper material for a drug-type cover. Background technique [0002] Foreign research institutions have done a lot of in-depth research on the relationship between the drug-type cover material, internal organization (grain size, morphology, grain boundary, etc.), manufacturing process and armor-piercing performance. The results show that the drug-mask material, grain size, grain orientation and other intrinsic performance parameters have a significant impact on the penetration ability, and the impurity elements and grain size of the drug-mask material are the key factors affecting the internal quality of the penetration performance. [0003] Copper has a history of more than 50 years as the drug-type cover of the shaped charge warhead. 98% of the existing armor-piercing warheads use copper drug-type covers. Or the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/22C22B15/14C22F1/08
CPCC22B9/228C22B15/00C22F1/08
Inventor 陈强舒大禹赵强屈俊岑黄树海张帷赵祖德
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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