Deep conical copper shaped charge liner tissue ultrafine crystallization gradient control method

A control method and a technology of a drug-type cover, which are applied to explosive charges, weapon accessories, offensive equipment, etc., can solve the problem of high cost of nanocrystalline drug-type cover, low yield of nanocrystalline materials, and large anisotropy of rolled sheets. and other problems, to achieve the effect of effective control, improvement of material utilization, and gradient of grain structure

Active Publication Date: 2018-09-11
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

The existing large plastic deformation technology is mainly based on conventional extrusion or forging, reverse rolling, and equal channel extrusion. This process has the following disadvantages: First, the grain size is not uniform, and there are mixed deformations in the weak deformation area or severe deformation area. Second, the anisotropy of the rolled plate is large; third, the yield of nanocrystalline materials by equal channel extrusion is low, and the performance consistency is poor; fourth, the process of preparing nanocrystals is long and complicated through a single process; fifth, The inner surface of the drug-shaped mask forms the main body of the effective jet, accounting for about 20% of the total weight, and the cost of preparing the overall nanocrystalline drug-shaped mask is expensive

Method used

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  • Deep conical copper shaped charge liner tissue ultrafine crystallization gradient control method
  • Deep conical copper shaped charge liner tissue ultrafine crystallization gradient control method
  • Deep conical copper shaped charge liner tissue ultrafine crystallization gradient control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039](1) Preparation of the billet: Take the variable-wall-thick drug-type cover with a double-cone structure as an example. The small cone angle at the top is 36°, the large cone angle is 64°, and the transition arc between the large cone angle and the small cone angle is R220mm; according to the theory of plastic forming and the principle of near-uniform plastic deformation, 0.3mm is left on the outer surface of the medicine cover machining allowance, and design a φ25mm forming process boss on the cone top of the drug-type cover; use UG and DEFORM software to simulate, analyze and optimize the forming process, and calculate the volume of the blank, and select a φ90mm extruded T2 copper rod as Raw materials, cutting and turning the outer surface to make a blank with a diameter of 88mm and a height of 55mm; the impurity element content of the T2 red copper rod is as shown in Table 1:

[0040] Table 1 Content of impurity elements in T2 copper rods

[0041]

[0042] Keep th...

Embodiment 2

[0055] (1) Preparation of the blank: Take the equal-wall-thick liner with a single-cone structure as an example. The diameter of the liner is φ156mm, the height is 162mm, the depth of the inner cone is 148mm, the maximum wall thickness is 3.2mm, and the angle of the inner cone is 60 °, according to the theory of plastic forming and the principle of near-uniform plastic deformation, a machining allowance of 0.4mm is left on the outer surface of the multi-pass extrusion drug cover, and a φ20mm forming process boss is designed on the top of the drug cover. ; Use UG and DEFORM software to simulate the forming process, and calculate the volume of the billet. Select a drawn T2 copper rod with a diameter of 60mm as the raw material, and cut the material and turn the outer surface to make a billet with a diameter of 58mm and a height of 80mm. Keep the blank in a VQG-2500 intelligent temperature-controlled vacuum heat treatment furnace at 400±1°C for 2 hours, and the vacuum degree is 1....

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Abstract

The invention provides a deep conical copper shaped charge liner tissue ultrafine crystallization gradient control method, which comprises the steps of extrusion shaping, re-crystallization heat treatment and high-frequency percussion, wherein in the extrusion shaping step, multi-pass extrusion is used; the high-frequency impact knocking speed is 15000 to 40000 times/minute; the knocking force is1200 to 2000 N; the times is 1 to 3 times. The control technology provided by the invention realizes the deep conical copper shaped charge liner shaping and surface quality control; the material plasticity is improved; the fine crystal tissues can be obtained; the ultrafine crystal gradient tissues distributed in the thickness direction are formed on the surface layer in the charge shaped liner. The ultrafine crystal gradient tissues distributed in the thickness direction of the charge shaped liner are obtained by using the method; the tissue distribution in the bus direction is uniform; a novel preparation method is provided for the invention of the high-performance deep conical copper shaped charge liner.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming, in particular to a method for controlling the ultra-fine crystallization gradient of a deep conical copper medicine-shaped cover structure. Background technique [0002] A typical shaped charge jet has a high head velocity (≥8500m / s) and a low tail velocity (about 3000m / s). This velocity gradient enables the jet to be drawn very long under a certain blasting height (up to 20 to 100 times the caliber length of the medicine mask), with high penetration ability. The penetrating ability of the jet is proportional to the length of the continuous jet, but due to the internal defects of the metal and the expansion of the jet, the jet will eventually break into sections of jujube-shaped particles in the axial direction, which limits the length of the continuous jet and the penetration of the jet. The transmission of penetration energy, and the mutual disturbance between the fractured parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22F1/02
CPCC22F1/02C22F1/08F42B1/032F42B1/036
Inventor 陈强舒大禹赵强赵祖德车路长吴洋胡传凯李辉
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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