A kind of super high-strength bulletproof steel plate and preparation method thereof

Abstract

The invention discloses an ultrahigh strength bulletproof steel plate and a preparation method thereof and belongs to the technical field of steel plate production. The steel plate is prepared from the following chemical components in percentage by weight: 0.26-0.34 percent of C, 0.20-0.60 percent of Si, 1.1-1.4 percent of Mn, 0.025-0.04 percent of Nb, 0.5-1.0 percent of Mo, 0.05-0.10 percent of V, 0.01-0.04 percent of Ti, 0.01-0.06 percent of Al, 0-1.1 percent of Ni, 0-0.6 percent of Cu, 0.8-1.2 percent of W, smaller than or equal to 0.010 percent of P, smaller than or equal to 0.004 percent of S, smaller than or equal to 0.008 percent of N and the balance of Fe and inevitable impurities. By adopting the ultrahigh strength bulletproof steel plate and the preparation method thereof, the coverage range of the strength level is 1800-2000MPa, and a material has good weldability, low-temperature impact toughness and cold forming performance as well as excellent bulletproof performance.

Description

technical field [0001] The invention relates to the technical field of steel plate production, in particular to an ultra-high-strength bulletproof steel plate and a preparation method thereof. Background technique [0002] Bulletproof steel plates are generally used in bulletproof protection and explosion-proof projects, such as shooting range equipment, bulletproof doors, bulletproof helmets, bulletproof vests, bulletproof shields; bank counters, confidential safes; riot vehicles, bulletproof cash carriers, shooting range equipment, armored personnel carriers , tanks, submarines, landing craft, anti-smuggling boats, helicopters, etc. However, the cold forming performance of bulletproof steel plates in the prior art is poor, and they are easy to crack when bent, so the outer protective plate of bulletproof vehicles can only be manufactured by tailor welding of multiple steel plates Or other complex-shaped bulletproof devices, and the softening of the heat-affected zone near ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an ultra-high-strength bulletproof steel plate and its preparation method, which solves or partially solves the problem of poor cold forming performance of the bulletproof steel plate in the prior art, which is easy to crack when bent, and can only be manufactured by tailor-welding multiple steel plates. Technical issues of vehicle outer fenders or other ballistic-proof devices with complex shapes

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