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A kind of preparation method of cold-formed titanium alloy bulletproof helmet

A bulletproof helmet and titanium alloy technology, which is applied in the field of cold forming titanium alloy bulletproof helmets, can solve the problems that the deep cavity of the helmet cannot be formed by cold drawing, the bulletproof effect cannot be achieved, and the requirements for equipment and molds are high, so as to reduce the cost of materials , Reduce processing costs, improve the effect of yield

Active Publication Date: 2019-12-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These helmets are mainly prepared by thermoforming of TC4 titanium alloy. The thickness of the helmet is more than 4mm. This method has high production costs and high requirements for equipment and molds. Moreover, thermoforming will also cause surface oxidation and burning of the helmet, reducing the yield.
Therefore, the price of these helmets is very expensive, and the price of a single product is more than 10,000 yuan
[0004] There is currently no cold-formed titanium alloy helmet on the market, because most titanium alloy sheets cannot be cold-drawn into helmet-shaped deep cavity parts
Only industrial pure titanium (TA1-TA4) can complete the cold forming of the helmet due to its good plasticity and ductility, but because the strength of industrial pure titanium is too low and the protective effect is poor, it cannot play a bulletproof effect

Method used

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  • A kind of preparation method of cold-formed titanium alloy bulletproof helmet
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the cold-formed titanium alloy bulletproof helmet of the present embodiment comprises the following steps:

[0028] Step 1. Coat the surface of the TB8 titanium alloy plate with a thickness of 2.2 mm with HX-031 anti-oxidation coating, then carry out solid solution treatment, and place it on an asbestos pad after being released from the furnace for air cooling; the temperature of the solid solution treatment is TB8 titanium alloy The temperature above the phase transition point is 30°C, and the holding time is 8 minutes; the TB8 titanium alloy plate has not been subjected to alkali-acid washing treatment in the hot rolling deformation process of the preparation process, and the average grain size of the TB8 titanium alloy plate is 22 μm;

[0029] Step 2: Cut the TB8 titanium alloy plate after air cooling in step 1 into a circular plate with a diameter of 440 mm, and then coat the surface of the TB8 titanium alloy plate that is in contact with th...

Embodiment 2

[0035]The preparation method of the cold-formed titanium alloy bulletproof helmet of the present embodiment comprises the following steps:

[0036] Step 1. Coat the surface of the TB5 titanium alloy plate with a thickness of 3.0mm with HX-031 anti-oxidation coating, then carry out solid solution treatment, and place it on an asbestos pad after being released from the furnace for air cooling; the temperature of the solid solution treatment is TB5 titanium alloy The phase transition point is 10°C above, and the holding time is 5 minutes; the TB5 titanium alloy plate has not been subjected to alkali pickling treatment in the hot rolling deformation process of the preparation process, and the average grain size of the TB5 titanium alloy plate is 25 μm;

[0037] Step 2. Cut the air-cooled TB5 titanium alloy sheet into a circular plate with a diameter of 400mm in step 1, and then coat the surface of the TB5 titanium alloy sheet that is in contact with the asbestos pad during air cool...

Embodiment 3

[0041] The preparation method of the cold-formed titanium alloy bulletproof helmet of the present embodiment comprises the following steps:

[0042] Step 1. Coat the surface of the TB8 titanium alloy plate with a thickness of 2.5mm with HX-031 anti-oxidation coating, then carry out solid solution treatment, and place it on an asbestos pad after being released from the furnace for air cooling; the temperature of the solid solution treatment is TB8 titanium alloy The temperature above the phase transition point is 40°C, and the holding time is 10 minutes; the TB8 titanium alloy plate has not been subjected to alkali pickling treatment in the hot rolling deformation process of the preparation process, and the average grain size of the TB8 titanium alloy plate is 24 μm;

[0043] Step 2. Cut the TB8 titanium alloy plate after air cooling in step 1 into a circular plate with a diameter of 500 mm, and then coat the surface of the TB8 titanium alloy plate that is in contact with the as...

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Abstract

The invention discloses a preparation method of a cold-forming titanium alloy bulletproof helmet. The preparation method comprises the steps of 1, coating the surface of a TB5 or TB8 titanium alloy plate with an anti-oxidation coating, then, conducting solution treatment above the phase transformation point, and putting the TB5 or TB8 titanium alloy plate on an asbestos pad for air cooling after delivering the TB5 or TB8 titanium alloy plate out of a furnace; 2, cutting the TB5 or TB8 titanium alloy plate obtained after air cooling into a round plate, then, applying a lubricating agent, and then, conducting two passes of cold drawing forming, so that a bulletproof helmet shell blank is obtained; and 3, after edge cutting of the bulletproof helmet shell blank is completed, conducting agingtreatment and air cooling, so that the bulletproof helmet is obtained. According to the preparation method, the high-strength TB5 titanium alloy plate or TB8 titanium alloy plate serves as a raw material; solution treatment above the phase transformation point, the two passes of cold drawing forming and aging treatment are sequentially adopted, so that the cold forming titanium alloy bulletproof helmet is obtained; the yield of the helmet is increased, and strength and hardness of the helmet are improved; and on the basis that the protection effect of the bulletproof helmet is guaranteed, themachining flow is shortened and simplified, and the machining cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of bulletproof helmet preparation, and in particular relates to a preparation method of a cold-formed titanium alloy bulletproof helmet. Background technique [0002] In the second half of the 20th century, there were two development directions for bulletproof helmets: one was the Kevlar helmet, whose representative work was PASGT in the United States; the other was a titanium alloy helmet, such as the PSH- 77. The former is favored by the United States, Britain, France, Australia and other countries, and is equipped in most armies; the latter is favored by a large number of special forces and special police units at that time, including Germany's GSG-9 and Russia's Alpha Group. helmet. Compared with Kevlar and other fiber material helmets, titanium alloy helmets have two advantages: (1) Kevlar and other fiber material helmets will gradually weaken their protective effect over time, and the shelf life is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21D22/20C22F1/00C22F1/18
CPCB21D22/20B23P15/00C22F1/008C22F1/183
Inventor 李磊毛小南周伟蔡建华
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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