Preparation method of cold-forming titanium alloy bulletproof helmet

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...

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

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