A steel plate for high elastic armor and its manufacturing method

A manufacturing method and elastic technology, applied in the field of high elastic armor steel plate and its manufacturing, can solve the problems of high cost, difficult operation, poor weldability, etc., and achieve the effects of preventing self-cracking, wide adaptability, and simplifying the process

A manufacturing method and elastic technology, applied in the field of high elastic armor steel plate and its manufacturing, can solve the problems of high cost, difficult operation, poor weldability, etc., and achieve the effects of preventing self-cracking, wide adaptability, and simplifying the process

CN104674121BActive Publication Date: 2017-03-08SHANDONG IRON & STEEL CO LTD
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  • A steel plate for high elastic armor and its manufacturing method
  • A steel plate for high elastic armor and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A steel plate for high-resistance armor, the chemical composition content by weight percentage is:

[0060] C: 0.21%, Si: 0.04%, Mn: 0.48%, P: 0.010%, S: 0.003%, Cr: 0.94%, Mo: 0.22%, Ti: 0.019%, Al: 0.029%, %, H: 0.00018 %, N: 0.0036%, CEV: 0.52%. The rest is Fe and inevitable impurities.

[0061] The manufacturing method includes the following steps:

[0062] 1) KR molten iron pretreatment: molten iron P=0.075%, sulfur content after pretreatment with KR molten iron is 0.003%.

[0063] 2) Converter smelting: the final component carbon of converter smelting is controlled at [C]=0.076%, S=0.007%, P=0.008%, and the final temperature is 1645°C.

[0064] 3) RH refining: the vacuum degree of RH refining is 87Pa, the treatment time is 15min, the pure degassing time is 12min, and then calcium oxide is added for calcium treatment. After calcium treatment, [Ca] is 16ppm;

[0065] 4) Slab continuous casting: the superheat of the continuous casting tundish is controlled at 15-20℃, and the ...

Embodiment 2

[0072] A steel plate for high-resistance armor, the chemical composition content by weight percentage is:

[0073] C: 0.25%, Si: 0.03%, Mn: 0.34%, P: 0.011%, S: 0.001%, Cr: 1.08%, Mo: 0.38%, Ti: 0.027%, Al: 0.049%, H: 0.00020%, N: 0.0032%, CEV: 0.60%, the rest is Fe and unavoidable impurities.

[0074] The steel plate manufacturing method includes the following steps:

[0075] 1) KR molten iron pretreatment: molten iron P=0.083%, sulfur content after pretreatment with KR molten iron is 0.002%.

[0076] 2) Converter smelting: the final carbon content of converter smelting is controlled at [C] = 0.092%, S = 0.005%, P = 0.007%, and the final temperature is 1642°C;

[0077] 3) RH refining: the vacuum degree of RH refining is 80Pa, the treatment time is 18min, the pure degassing time is 13min, and then calcium oxide is added for calcium treatment, after calcium treatment [Ca]=22ppm;

[0078] 4) Slab continuous casting: the superheat of the tundish of continuous casting is controlled at 16-22...

Embodiment 3

[0086] A steel plate for high-resistance armor, the chemical composition content by weight percentage is:

[0087] C: 0.28%, Si: 0.06%, Mn: 0.28%, P: 0.009%, S: 0.003%, Cr: 1.27%, Mo: 0.31%, Ti: 0.035%, Al: 0.035%, H: 0.00017%, N: 0.0031%, CEV: 0.64%, the rest is Fe and unavoidable impurities.

[0088] The production method of steel plate is as follows:

[0089] 1) KR molten iron pretreatment: molten iron P=0.068%, the sulfur content after pretreatment with KR molten iron is equal to 0.002%.

[0090] 2) Converter smelting: the final component carbon of converter smelting is controlled at [C]=0.09%, S=0.004%, P=0.007%, and the final temperature is 1657℃;

[0091] 3) RH refining: the vacuum degree of RH refining is 91Pa, the treatment time is 16min, the pure degassing time is 10min, after calcium treatment [Ca]=19ppm;

[0092] 4) Slab continuous casting: the superheat of the tundish of continuous casting is controlled at 14-20℃, and the temperature fluctuates 8℃ throughout the process;

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Abstract

The invention relates to an armor steel plate with a high anti-bullet property and a manufacturing method of the armor steel plate. The armor steel plate comprises chemical components in percentage by weight as follows: 0.20%-0.28% of carbon, smaller than or equal to 0.10% of silicon, 0.20%-0.50% of manganese, smaller than or equal to 0.012% of phosphorus, smaller than or equal to 0.003% of sulfur, 0.90%-1.30% of chromium, 0.20%-0.40% of molybdenum, 0.015%-0.035% of titanium, 0.020%-0.050% of aluminum, smaller than or equal to 0.00020% of hydrogen, smaller than or equal to 0.0040% of nitrogen, smaller than or equal to 0.65% of carbon equivalent and the balance of iron and inevitable impurities. The hardness of armor steel with the high anti-bullet property reaches 480-550 HBW, the shock absorption energy at the temperature of subzero 40 DEG C is larger than or equal to 20 J, and the armor steel plate has penetration resistance, can prevent armor steel from cracking, breaking or stripping and has the characteristics of low cost, stable quality, simplified process and easiness in large-scale industrial production.

Description

Technical field [0001] The invention relates to a steel plate for high-resistance armor and a manufacturing method thereof, and belongs to the technical field of steel smelting. [0002] technical background [0003] Because armored steel has advantages in alloy selection, machining, welding costs, industrialized manufacturing recycling, multiple attack protection, and manufacturing difficulty, armored ballistic steel is widely used in the military. In the civil field, armored steel can be used to manufacture civil vehicle shields and explosion-proof shells, hard body armor, public security explosion-proof vehicles, currency transport vehicles, etc. Therefore, high-performance armored ballistic steel has a broad application prospect in the civil field. [0004] Armored steel plates are required to have high hardness, high yield strength, high tensile strength and certain elongation and toughness indicators. High-hardness steel is used to destroy projectiles to ensure penetration res...

Claims

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Application Information

Patent Timeline
08 Mar 2017
Publication
CN104674121B
IPC
C22C38/28; C22C33/04; C21D8/02
Inventors
胡淑娥; 李永亮