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Tantalum-tungsten material and preparation method thereof

An ingot casting and pickling technology, applied in the field of metal materials, can solve the problems of large grain size, poor plate homogeneity, uneven grain size, etc.

Active Publication Date: 2013-08-14
NINGXIA ORIENT TANTALUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is mainly based on flat forging and rolling in the longitudinal and vertical directions. This process has the following disadvantages: 1. The grain size is not uniform, and there are large grains; 2. The isotropy of the final plate is relatively low. Difference

Method used

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  • Tantalum-tungsten material and preparation method thereof
  • Tantalum-tungsten material and preparation method thereof
  • Tantalum-tungsten material and preparation method thereof

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preparation example Construction

[0024] The embodiment of the present invention discloses a method for preparing a tantalum-tungsten material, which includes the following steps:

[0025] 1) The tantalum and tungsten ingot is forged for the first time, and the tantalum and tungsten ingot after the first forging is subjected to the first heat treatment;

[0026] 2) The tantalum and tungsten ingot obtained in step 1) is forged for the second time, and the tantalum and tungsten material after the second forging is subjected to a second heat treatment;

[0027] 3) The tantalum-tungsten ingot obtained in step 2) is rolled, and the rolled tantalum-tungsten ingot is subjected to a third heat treatment to obtain a tantalum-tungsten material.

[0028] According to the present invention, in the process of preparing tantalum-tungsten materials, it is first necessary to provide tantalum-tungsten ingots, which can be obtained by electron beam melting, and the present invention has no special limitation on the preparation ...

Embodiment 1

[0041] 1) The tantalum 2.5 tungsten ingot is obtained by electron beam melting. The diameter of the tantalum 2.5 tungsten ingot is 153 mm and the length is 250-260 mm. The composition of the tantalum 2.5 tungsten ingot is shown in Table 1. The elemental composition data table;

[0042] Table 1 Elemental composition data table of tantalum 2.5 tungsten ingot

[0043]

[0044] 2) The tantalum 2.5 tungsten ingot obtained in step 1) was ultrasonically tested, and then the tantalum 2.5 tungsten ingot was heated to 400°C, kept warm for 150 minutes, and then subjected to axial upsetting with an upsetting ratio of 1.6; then radial elongation, Obtain a tantalum 2.5 tungsten rod with a diameter of 100mm and a length of 450mm;

[0045] 3) The tantalum 2.5 tungsten rod obtained in step 2) is divided into 2 sections in the length direction, and one section is taken and the forging defect of the end face is removed;

[0046] 4) Pickling the tantalum 2.5 tungsten rod obtained in step 3):...

Embodiment 2

[0057] 1) The tantalum 2.5 tungsten ingot is obtained by electron beam melting. The diameter of the tantalum 2.5 tungsten ingot is 155mm and the length is 242mm. The composition of the tantalum 2.5 tungsten ingot is shown in Table 2. ingredient data sheet;

[0058] Table 2 Elemental composition data table of tantalum 2.5 tungsten ingot

[0059]

[0060] 2) The tantalum 2.5 tungsten ingot obtained in step 1) was ultrasonically inspected, then the tantalum 2.5 tungsten ingot was heated to 500°C, kept warm for 150 minutes, and then subjected to axial upsetting with an upsetting ratio of 2.0; then radial elongation, Obtain a tantalum 2.5 tungsten rod with a diameter of 100mm and a length of 443mm;

[0061] 3) The tantalum 2.5 tungsten rod obtained in step 2) is divided into 2 sections in the length direction, and one section is taken and the forging defect of the end face is removed;

[0062] 4) Pickling the tantalum 2.5 tungsten rod obtained in step 3): the volume ratio of h...

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Abstract

The invention provides a preparation method of a tantalum-tungsten material. The preparation method comprises the following steps of: (1) carrying out forging on a tantalum-tungsten ingot for the first time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the first-time forging for the first time; (2) carrying out forging on the tantalum-tungsten ingot obtained in the step (1) for the second time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the second-time forging for the second time; and (3) rolling the tantalum-tungsten ingot obtained in the step (2), and carrying out heat treatment on the tantalum-tungsten ingot subjected to rolling for the third time to obtain the tantalum-tungsten material. In the process of preparing the tantalum-tungsten material, two times of forging is carried out to ensure that internal crystalline gains of the ingot are fully crushed so as to obtain uniform internal organizations, and then rolling is carried out so as to ensure that the ingot is uniformly deformed in each direction, so that the material surely has uniform mechanical properties and microstructures in each direction. The invention also provides the tantalum-tungsten material prepared by the preparation method.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a tantalum-tungsten material and a preparation method thereof Background technique [0002] The Explosively Formed Penetrator (EFP) warhead is a penetrator with high center-of-mass velocity and structural shape that is forged by using the principle of shaped charge to crush and deform the metal liner by the shaped-energy explosive bombardment of explosives. . Therefore, the material used for the warhead liner must have good dynamic ductility and tensile strength in order to form an EFP warhead with a certain length-to-diameter ratio. [0003] At present, the metal materials suitable for making the EFP warhead liner cover mainly include: copper, pure iron, tantalum, tantalum alloy, niobium and silver, etc., among which the density of copper is 8.96g / cm 3 , the density of tantalum is 16.6g / cm 3 , 1.86 times that of copper. The use of high-density materials to make medic...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22C27/02
Inventor 张亚军汪凯李积贤李桂鹏李瑞莲任晓
Owner NINGXIA ORIENT TANTALUM IND
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