Method for manufacturing high-strength hot rolled bulletproof steel plate

A manufacturing method and hot-rolled sheet technology, applied in the field of metal materials, can solve the problems of poor plate shape and cold workability, increased alloy cost, reduced strength, etc., and achieve the effects of good welding performance, low alloy cost and moderate hardness

Active Publication Date: 2014-08-20
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel plates on the market are generally treated by quenching and low temperature tempering, the plasticity of the steel plate is reduced, the plate shape and cold working performance are poor, and the strength of the heat-affected zone after welding is reduced.
It is possible to increase the composition of C, Si, and Mn without heat treatment, and achieve a reasonable structure configuration through segmental cooling. Alth

Method used

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  • Method for manufacturing high-strength hot rolled bulletproof steel plate
  • Method for manufacturing high-strength hot rolled bulletproof steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The main chemical composition (%) of continuous casting billet of table 1

[0022] Referring to Table 1, the A-1, A-2 and A-3 embodiments are operated. Step 1, smelting and casting to obtain a continuous casting slab with qualified components, sending the continuous casting slab into a heating furnace for heating, and the heating temperature of the heating furnace is 1250°C; Step 2, hot rolling the heated continuous casting slab, the hot rolled The starting rolling temperature is 1020°C, and the final rolling temperature is 850°C; step 3, cooling the hot-rolled continuous casting billet at a laminar cooling rate of 30°C / s; coiling the cooled continuous casting billet to obtain hot Roll the plate, the coiling temperature is 550°C, the thickness of the obtained hot-rolled plate is 3.0mm; Step 5, heat-treat the hot-rolled plate to obtain bulletproof steel plate, heat the hot-rolled plate at 920°C for 10 minutes, water quench, and then pass through 300 After temperi...

Embodiment 2

[0027] Step 1, smelting and casting to obtain a continuous casting slab with qualified components, sending the continuous casting slab into a heating furnace for heating, and the heating temperature of the heating furnace is 1200°C; Step 2, hot rolling the heated continuous casting slab, the hot rolled The starting rolling temperature is 1000°C, and the finishing rolling temperature is 840°C; step 3, cooling the hot-rolled continuous casting slab at a laminar cooling rate of 25°C / s; coiling the cooled continuous casting slab to obtain hot Rolling the plate, the coiling temperature is 480°C, the thickness of the obtained hot-rolled plate is 2.0mm; step 5, heat-treating the hot-rolled plate to obtain a bullet-proof steel plate, the hot-rolled plate is kept at 850°C for 13 minutes, water quenched, and then subjected to 300 After tempering at ℃ for 3 minutes, air-cool to obtain a bulletproof steel plate.

Embodiment 3

[0029] Step 1, smelting and casting to obtain a continuous casting slab with qualified components, sending the continuous casting slab into a heating furnace for heating, and the heating temperature of the heating furnace is 1230°C; Step 2, hot rolling the heated continuous casting slab, the hot rolled The starting rolling temperature is 1100°C, and the finishing rolling temperature is 900°C; step 3, cooling the hot-rolled continuous casting slab at a laminar cooling rate of 35°C / s; coiling the cooled continuous casting slab to obtain hot Roll the plate, the coiling temperature is 500°C, and the thickness of the obtained hot-rolled plate is 2.5mm; step 5, heat-treat the hot-rolled plate to obtain a bullet-proof steel plate, heat the hot-rolled plate at 930°C for 10 minutes, water quench, and then pass through 300 After tempering at ℃ for 6 minutes, air-cool to obtain a bulletproof steel plate.

[0030] The manufacturing method of the high-strength hot-rolled bulletproof steel ...

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Abstract

The invention discloses a method for manufacturing a high-strength hot rolled bulletproof steel plate, and belongs to the technical field of metal materials. The bulletproof steel plate comprises the following components: 0.08-0.12% of C, 0.7-1.3% of Si, 1.30-1.8% of Mn, 0.01-0.06% of Al, less than or equal to 0.02% of P, less than or equal to 0.004% of S, less than or equal to 0.004% of N, less than or equal to 0.015% of O, 0.3-1.0% of Gr, less than or equal to 0.2% of Ti and Nb, 0.0015-0.0025% of B and the balance of Fe and inevitable impurities. The method for manufacturing the high-strength hot rolled bulletproof steel plate comprises the following steps: 1, smelting the components to cast a continuous casting billet with qualified components, feeding the continuous casting billet into a heating furnace and heating; 2, performing hot rolling on the heated billet; 3, cooling the hot rolled continuous casting billet; 4, coiling the cooled continuous casting billet to obtain a hot rolled plate; 5, performing thermal treatment on the hot rolled plate to obtain the bulletproof steel plate. The high-strength hot rolled bulletproof steel plate disclosed by the invention is high in ductility and moderate in hardness, meanwhile, the alloy cost is relatively low, the process is easy in implementation, and the welding performance of the bulletproof steel plate is good.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a method for manufacturing a high-strength hot-rolled bulletproof steel plate. Background technique [0002] The most basic requirement of steel for bulletproof vehicles is bulletproof, that is, to prevent high-speed bullets from penetrating the steel plate, and at the same time reduce the thickness of the steel plate as much as possible on the basis of ensuring bulletproof performance, so as to adapt to the trend of lightweight vehicles. Generally, the bulletproof steel plate has higher strength and hardness, which increases the energy consumed by the projectile penetrating the steel plate, which is beneficial to the bulletproof performance. At the same time, certain cold forming properties and welding properties are required. Due to the existence of adiabatic shear phenomenon, the higher the hardness is not the better, when the hardness exceeds a certain value, the ant...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C33/04C21D8/02
Inventor 姚志强郭佳赵运堂刘杰杜宇李飞
Owner SHOUGANG CORPORATION
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