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Twin crystal induction plastic steel drug-shaped cover

A technology of twin-induced plasticity and drug-shaped hood, which is applied in heat treatment equipment, furnaces, heat treatment furnaces, etc., can solve the problems of limited, insufficient length-diameter ratio of explosively formed projectiles, and high cost.

Inactive Publication Date: 2010-09-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drug-shaped cover materials currently used have problems such as high cost, insufficient aspect ratio of explosively formed projectiles, plasticity to be improved, environmental pollution, and limited resources. Therefore, on the basis of current applications, the new drug-shaped The application of the cover material needs to comprehensively consider the mechanical properties, density, cost and environmental protection of the material. Among the existing materials, materials with high strength, toughness, plasticity, sufficient density and abundant resources can be applied to the drug-shaped cover. Manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. Preparation of twinning induced plasticity steel: the steel plate is prepared by traditional vacuum smelting and rolling process,

[0013] Composition (mass fraction) of twinning induced plasticity steel: C, ≤0.08%; Mn, 25%; Al, 3%; Si, 3%; S, ≤0.009%; P, ≤0.01%; Fe is the balance.

[0014] Rolling process: the steel plate is heated at 1200°C for 2 hours; it is hot-rolled with a two-roll hot rolling mill to obtain a steel plate with a thickness of about 12mm, the total deformation is 80% to 90%, and the starting and finishing temperatures are 1100°C and 1000°C respectively. 950°C, cold rolling on a four-roll cold rolling mill to a thickness of about 4-7mm.

[0015] 2. Heat treatment process of cold-rolled steel plate: put the cold-rolled steel plate in a heating furnace for solid solution at 900°C for 0.5 hour, and cool to room temperature at a cooling rate of 20°C / s.

[0016] 3. Drug-shaped cover forming process: According to the designed size, the steel plate is p...

Embodiment 2

[0020] The difference from Example 1 is the difference in the chemical composition of the twin-induced plasticity steel, the specific chemical composition is (mass fraction): C, ≤0.08%; Mn, 35%; Al, about 3%; Si, about 3% ; S, ≤0.009%; P, ≤0.01%; Fe is the balance.

[0021] The room-temperature microstructure of the drug-shaped mask is single-phase austenite containing annealing twins, and the room-temperature elongation rate is ≥80%.

Embodiment 3

[0023] The difference from Example 1 and Example 2 is that the chemical composition of the twinning induced plasticity steel is different, and the solution heat treatment process of the drug-shaped mask is different.

[0024] 1. Preparation of twinning induced plasticity steel: the steel plate is prepared by traditional vacuum smelting and rolling process,

[0025] Composition (mass fraction) of twinning induced plasticity steel: C, ≤0.08%; Mn, 30%; Al, 3%; Si, 3%; S, ≤0.009%; P, ≤0.01%; Fe is the balance.

[0026] Rolling process: the steel plate is heated at 1200°C for 2 hours; it is hot-rolled with a two-roll hot rolling mill to obtain a steel plate with a thickness of about 12mm, the total deformation is 80% to 90%, and the starting and finishing temperatures are 1100°C and 1000°C respectively. 950°C, cold rolling on a four-roll cold rolling mill to a thickness of about 4-7mm.

[0027] 2. Heat treatment process of cold-rolled steel plate: put the cold-rolled steel plate i...

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Abstract

The invention relates to a twin crystal induction plastic steel drug-shaped cover which belongs to the field of metal materials. The composition range of the material is as follows: C:<=0.08 percent, Mn: 25 to 35 percent; Al: 2 to 4 percent; Si: 2 to 3 percent, S:<=0.01 percent, P:<=0.01 percent, and the balance Fe. The invention carries out double-solution treatment to the drug-shaped cover material: the thickness of a rolled board is 4 to 7mm, first time of solution treatment: the solution is carried out for 30min at 900DEG C, and the cooling speed is 20DEG C / s; and then the board is processed into the drug-shaped cover through a formation process, the wall thickness is 3 to 5mm, and solution is carried out again; and the solution is carried out for 45 to 90min at 1000 to 1100DEG C, and the cooling speed is 20 to 50DEG C / s. The elongation rate at room temperature after heat treatment is more than or equal to 80 percent. TWIP steel is applied to the field of drug-shaped cover material, thereby preventing cracks and other defects in the drug-shaped cover forming process on the one hand so as to improve the finished material rate, and forming the drug-shaped cover into complete bullets with large slenderness ratio during a bullet forming process through explosion on the other hand, so as to improve the penetration capability of the bullets; and therefore, the twin crystal induction plastic steel drug-shaped cover is a high-grade drug-shaped cover material.

Description

technical field [0001] The invention relates to the field of drug-shaped mask materials, in particular to the application of twin crystal induced plastic steel on the drug-shaped mask. Background technique [0002] The function of the drug-shaped cover is to use the explosive action to form a high-speed projectile, so as to obtain better penetration performance when penetrating the target. After the high-energy explosive is detonated, the high-temperature and high-pressure detonation products act on the drug-shaped cover, causing the cover material to undergo great plastic deformation and be crushed and closed to form a high-centroid velocity (1500-3000m / s) and a certain structural shape. A projectile that uses kinetic energy to penetrate a target. [0003] Drug-shape material is a very critical factor for improving the formability and penetration performance of explosively formed projectiles (EFP). In order to form a good projectile and reduce the mass loss in the deforma...

Claims

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Application Information

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IPC IPC(8): C21D8/00C22C38/06C21D9/00
Inventor 任学平包卫平李润蔚董成文熊志平
Owner UNIV OF SCI & TECH BEIJING
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