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Bulletproof steel plate as well as preparation method and application thereof

A steel plate and molten steel technology, which is applied in the field of bulletproof steel plate and its preparation, can solve the problems of low deformation resistance and insufficient lightness of the steel plate, and achieve the effects of refining grains, ensuring high strength, and ensuring low deformation resistance

Inactive Publication Date: 2020-06-05
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the present invention provides a bulletproof steel plate, which adds a certain amount of elements such as Cr, Mo, V and Als on the basis of the prior art and strictly controls the ratio of each element, so that the The steel plate has the advantages of high strength, light weight and thin gauge; the preparation method of the bulletproof steel plate can maximize the precipitation strengthening and grain refinement of the added alloy elements by controlling the processes of heating, rolling, coiling and heat treatment. Effect, in order to ensure the low deformation resistance and high strength when the steel plate is rolled, and at the same time have good formability, can obtain light and thin high-strength steel plate with martensitic structure, solve the problem that the steel plate in the prior art is not light enough, can It is well used in various fields that require bulletproof and explosion-proof, such as vehicles, counters or furniture, and has good application value

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  • Bulletproof steel plate as well as preparation method and application thereof

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Effect test

Embodiment 1

[0096] This embodiment provides a bulletproof steel plate, which includes the following components in terms of mass percentage: C: 0.26%, Si: 0.20%, Mn: 0.75%, P: 0.009%, S: 0.003%, Ni : 1.05%, Cr: 0.75%, Mo: 0.25%, V: 0.085%, Als: 0.020%, N: 0.0020%, and the balance is Fe and inevitable impurity elements.

[0097] The preparation method of the bulletproof steel plate provided by this embodiment comprises the following steps:

[0098] (1) smelting the raw material components into molten steel, and the molten steel obtains slab through molten steel desulfurization, converter smelting, ladle refining, RH vacuum cycle degassing refining and continuous casting operations;

[0099] (2) The slab is heated to 1220°C, descaled by 18MPa high-pressure water, and then subjected to 5 passes of rough rolling, and the outlet temperature is 1120°C. Rolling, the inlet temperature of finish rolling is 1040°C, and the outlet temperature is 880°C. After the finish rolling, the laminar cooling r...

Embodiment 2

[0102] This embodiment provides a bulletproof steel plate, which includes the following components in terms of mass percentage: C: 0.31%, Si: 0.40%, Mn: 1.10%, P: 0.010%, S: 0.003%, Ni : 1.30%, Cr: 1.10%, Mo: 0.45%, V: 0.105%, Als: 0.060%, N: 0.0030%, and the balance is Fe and unavoidable impurity elements.

[0103] The preparation method of the bulletproof steel plate provided by this embodiment comprises the following steps:

[0104] (1) smelting the raw material components into molten steel, and the molten steel obtains slab through molten steel desulfurization, converter smelting, ladle refining, RH vacuum cycle degassing refining and continuous casting operations;

[0105] (2) The slab is heated to 1260°C, descaled by 18MPa high-pressure water, and then subjected to 5 passes of rough rolling, and the outlet temperature is 1160°C. Rolling, the inlet temperature of finish rolling is 1080°C, and the outlet temperature is 920°C. After the finish rolling, the laminar cooling ...

Embodiment 3

[0108] This embodiment provides a bulletproof steel plate, which includes the following components in terms of mass percentage: C: 0.30%, Si: 0.30%, Mn: 0.90%, P: 0.008%, S: 0.002%, Ni : 1.20%, Cr: 0.95%, Mo: 0.30%, V: 0.095%, Als: 0.040%, N: 0.002%, and the balance is Fe and inevitable impurity elements.

[0109] The preparation method of the bulletproof steel plate provided by this embodiment comprises the following steps:

[0110] (1) smelting the raw material components into molten steel, and the molten steel obtains slab through molten steel desulfurization, converter smelting, ladle refining, RH vacuum cycle degassing refining and continuous casting operations;

[0111] (2) The slab is heated to 1242°C, descaled by 18MPa high-pressure water, and then subjected to 5 passes of rough rolling, the outlet temperature is 1144°C, and 7-stand rolling mills are used for finishing rolling after coiling by the hot coil box. Rolling, the inlet temperature of finish rolling is 1063°...

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Abstract

The invention provides a bulletproof steel plate. The bulletproof steel plate has the advantages of high strength, light weight and thin specification by adding a certain content of Cr, Mo, V, Als (acid-soluble aluminum) and other elements and strictly controlling the ratio of the elements. The invention also provides a preparation method of the bulletproof steel plate, which can maximize the precipitation strengthening and grain refinement effects of the added alloy elements by controlling heating, rolling, coiling, heat treatment and other procedures to ensure that the steel plate has the low deformation resistance and high strength during rolling, and meanwhile has the favorable formability, the high-strength steel plate with a martensite structure can be obtained, can be well applied to various fields such as vehicles, counters or furniture, and has good application value.

Description

technical field [0001] The invention relates to the technical field of metal material processing and production, in particular to a bulletproof steel plate and a preparation method and application thereof. Background technique [0002] With the ever-changing development of cutting-edge technology in military weapons, the protection requirements of bulletproof vehicles are also getting higher and higher. Because of their different defense functions, in addition to being able to withstand the attacks of deadly bullets and explosive fragments, they also have flexible mobility and Vandal resistance. With the development trend of weight reduction and lightweight of bulletproof vehicles and the improvement of safety, special vehicle manufacturers have a strong demand for ultra-thin bulletproof steel plates, hoping that iron and steel enterprises can provide bulletproof steel with high strength, light weight and meet the processing and use requirements. [0003] At present, the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/44C22C38/02C22C38/04C22C38/06C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 张晓磊王宝华罗波窦双江王景宁温春普
Owner HEBEI IRON AND STEEL
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