Superhigh-strength armour plate and manufacturing process thereof

Abstract

The invention discloses a superhigh-strength armour plate and a manufacturing process thereof. The superhigh-strength armour plate comprises the following chemical components in percentage by weight: 0.30- 0.5% of C, 0.40-0.60% of Si, 1.50-1.80% of Mn, not more than 0.025% of P, not more than 0.01% of S, not more than 2.5% of the sum of Cr, Ni and Mo, not more than 0.20% of the sum of Nb, V, Ti and B and the balance of Fe. Based on a low alloy component design, the manufacturing process of the superhigh-strength armour plate comprises the following steps of: heating at 1180-1250 DEG C, performing primary rolling at 100-1150 DEG C, performing final rolling at 850-900 DEG C and performing thermal treatment at 900-950 DEG C; in addition, a water-cooling hot impact forming process is also adopted in the manufacturing process, wherein water flows into a die at the pressure of 7-8bar, exit pressure is 5.5-7bar, water velocity is 1.5-3m / s. By using the manufacturing process, a 2.2mm-thickness B-grade superhigh-strength light armour plate and a 3.7mm-thickness C-grade superhigh-strength light armour plate which meet all performance requirements and have good plate flatness and no oxide skin on the surface can be manufactured.

Description

technical field [0001] The invention relates to an ultra-high-strength lightweight steel plate and its manufacturing and forming process, in particular to a thermoforming manufacturing process of a bullet-proof bullet-proof steel plate for an explosion-proof vehicle. Background technique [0002] In the face of various contradictions and complicated public security situation, all countries are strengthening the anti-terrorism and anti-explosion public security work, and the demand for anti-terrorism and anti-explosion vehicles is increasing day by day. Anti-terrorism and explosion-proof vehicles require not only high bulletproof performance, but also good mobility and energy saving and emission reduction performance. Thinning the thickness of bulletproof steel plates and making bulletproof vehicles lightweight is one of the effective ways to improve vehicle mobility and achieve the purpose of energy saving and emission reduction. However, while reducing the thickness of the...

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Problems solved by technology

[0004] Although the above representative typical products have their own characteristics, they have high alloy content and cannot meet the requirements of light weight, high bulletproof performance and high cost performance of bulletproof steel plates at the same time.

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