Bulletproof steel plate for armor and manufacturing method thereof

Abstract

The invention provides a bulletproof steel plate for armor and a manufacturing method of the bulletproof steel plate. The bulletproof steel plate for the armor is prepared from, by weight, 0.25-0.38%of C, 0.20-0.40% of Si, 0.22-0.50% of Mn, 0.015% or less of P, 0.005% or less of S, 0.010-0.050% of Alt, 0.10-0.38% of Ni, 0.80-1.50% of Cr, 0.16-0.40% of Mo, 0.010-0.035% of Ti, 0.0050% or less of N,0.00022% or less of H and the balance Fe and inevitable impurities. The manufacturing method of the steel plate comprises a steel making work procedure, a steel rolling work produce and a heat treatment work procedure. The bulletproof steel plate for the armor improves the plastic toughness index while ensuring the strength of the steel plate. The manufacturing method of the bulletproof steel plate for the armor is reasonable in design, the advantages of each control process are fully exerted, the uniformity of the performance of the steel plate is guaranteed, the influence of residual internal stress of the steel plate is effectively eliminated, and the subsequent cutting, welding and other machining properties of the steel plate are improved.

Description

technical field [0001] The invention relates to the technical field of high-strength quenched and tempered steel and its production process, in particular to a bulletproof steel plate for armor and a manufacturing method thereof. The bulletproof steel plate for armor has a Brinell hardness within the range of 480HBW-530HBW. Background technique [0002] Armor protection is the basis for tank armored vehicles to survive on the battlefield. In modern warfare, tank armored vehicles face all kinds of anti-armor weapons such as enemy tank guns, anti-tank missiles, shoulder-mounted anti-tank weapons, anti-tank grenades, improvised explosive devices, electromagnetic weapons, and high-power microwave weapons. Attacks have put forward higher requirements for the protection capabilities of tanks and armored vehicles. Therefore, strengthening armor protection has become a research hotspot in various countries. [0003] The main function of the bulletproof steel plate is to prevent bu...

AI Technical Summary

Problems solved by technology

[0010] CN102181795A discloses an ultra-high-strength bulletproof steel plate and its manufacturing process. The carbon content is relatively high at 0.3-0.5%, and alloying elements such as Cr, Ni, Mo, V, Ti, and B are added. After quenching treatment, due to the relatively low carbon equivalent High, the yield strength has reached more than 1350MPa, the hardness value is in the range of 480-630HBW according to different thicknesses, but the elongation is lower than 5%

Images