Method for producing hot stamping forming bulletproof piece

Abstract

The invention discloses a method for producing a hot stamping forming bulletproof piece. According to the hot stamping forming bulletproof piece, a bulletproof steel plate with the thickness being larger than 1.8mm is heated to a fully-austenitic area at first and then is stamped to be in a certain shape; and meanwhile, quenching is achieved by means of rapid cooling in the forming process so that the bulletproof piece can achieve a super-strength mechanical property, for example, the tensile strength is not lower than 1550MPa, and the capacity of resisting bullet shooting or breaking is achieved. The method is characterized by including the following steps that the bulletproof steel plate with the thickness being larger than 1.8mm is heated to be fully austenitic and then is subjected to mold hot stamping forming so that the bulletproof piece can be formed, austenite is synchronously quenched into martensite in a mold, the mold is provided with a quenching device used for cooling the bulletproof piece, flowing cooling media are contained in the quenching device, and the bulletproof piece is cooled below the martensite transformation finishing temperature Mf through the cooling media to be turned into a martensite bulletproof piece.

Description

technical field [0001] The present invention relates to bullet-proof parts technology, in particular to a production method of hot-stamped bullet-proof parts. The hot-stamped bullet-proof parts refer to heating a steel plate with a thickness greater than 1.8mm to a complete austenitic region, and then punching it into a certain shape. At the same time, quenching is achieved through rapid cooling during the forming process, so that the bulletproof parts can obtain ultra-high-strength mechanical properties, for example, the tensile strength is not less than 1550MPa, and it has the ability to resist bullets or fragments. Background technique [0002] Bulletproof parts usually have a certain shape and can be used for vehicle bulletproof, bulletproof vest inserts, bulletproof shields and other personal protection ranges. When producing bulletproof parts, especially bulletproof parts for vehicles, due to the high strength of bulletproof steel plates, they are usually produced by c...

AI Technical Summary

Problems solved by technology

When producing bulletproof parts, especially bulletproof parts for vehicles, due to the high strength of bulletproof steel plates, they are usually produced by cutting, tailor welding, etc., sometimes with simple bending and forming, which eventually leads to parts (such as bulletproof hubcaps). It is made of overlapping steel plates, which not only increases the weight, but also reduces the ballistic performance of the weld seam sharply.

Some bulletproof parts (such as the roof of the vehicle escape cabin, bulletproof vest inserts, and bulletproof shields) are produced by cold forming first and heat treatment to obtain bulletproof performance. During heat treatment, the quenching deformation is large and the scrap rate is high.

Sometimes the steel plate is processed into a bulletproof steel plate first, and then forced to be formed by cold forming, which not only requires extremely high production capacity of the equipment, but also increases the residual stress caused by deformation in the bulletproof parts to reduce the bulletproof performance. High strength steel plate and poor formability lead to limited shape

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