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High-plasticity steel hot-rolled coil for welded gas cylinder and production technology of high-plasticity steel hot-rolled coil

A technology of steel for gas cylinders and hot-rolled coils. It is applied in the field of steel for welding gas cylinders. It can solve the problems of not meeting the requirements of suppliers and the difficulty of obtaining uniform structures, so as to improve the strength, increase the bottle forming rate, and improve the performance. stable effect

Active Publication Date: 2014-03-26
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The welded bottle users at home and abroad have high requirements on the bottle forming rate of welded steel, and many users hope that the bottle forming rate can reach 100%. The main factor determining the bottle forming rate is the performance of the steel, which requires both high strength and High plasticity, but due to the chemical composition of hot-rolled steel coils and the limitations of the production process, it is difficult to obtain a uniform structure, which cannot meet the requirements of suppliers

Method used

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  • High-plasticity steel hot-rolled coil for welded gas cylinder and production technology of high-plasticity steel hot-rolled coil
  • High-plasticity steel hot-rolled coil for welded gas cylinder and production technology of high-plasticity steel hot-rolled coil
  • High-plasticity steel hot-rolled coil for welded gas cylinder and production technology of high-plasticity steel hot-rolled coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the hot-rolled coil of steel for high-plasticity welded gas cylinders, the mass percentage of chemical composition is: C: 0.12%, Mn: 0.75%, P: 0.0143%, S: 0.0015%, Als: 0.026% , The balance is Fe and impurity elements.

[0023] The steel undergoes converter smelting, ladle argon blowing, ladle refining furnace refining, and continuous casting. After heating, it enters two-stand rough rolling, and then passes through seven continuous rolling mills for finishing, and finally is cooled and coiled after rolling.

[0024] Among them, the rolling process parameters are: heating temperature 1200°C, bloom opening temperature 1150°C, finishing rolling opening temperature 1000°C, finishing rolling temperature 890°C,

[0025] The cooling process adopts intermittent water curtain laminar cooling, the water cooling rate is 18℃ / S, and the final cooling temperature is 630℃.

[0026] The mechanical properties of welded gas cylinder steel are shown in Table 1, and the metallograph...

Embodiment 2

[0027] Embodiment 2, the hot-rolled coil of steel for high-plasticity welded gas cylinders, the mass percentage of chemical composition is: C: 0.13%, Mn: 0.73%, P: 0.0112%, S: 0.0010%, Als: 0.029% , The balance is Fe and impurity elements.

[0028] The steel undergoes converter smelting, ladle argon blowing, ladle refining furnace refining, and continuous casting. After heating, it enters two-stand rough rolling, and then passes through seven continuous rolling mills for finishing, and finally is cooled and coiled after rolling.

[0029] Among them, the rolling process parameters are: heating temperature 1200°C, bloom opening temperature 1165°C, finishing rolling opening temperature 950°C, finishing rolling temperature 895°C,

[0030] The cooling process adopts intermittent water curtain laminar cooling, the water cooling rate is 19℃ / S, and the final cooling temperature is 625℃.

[0031] The mechanical properties of welded gas cylinder steel are shown in Table 1.

Embodiment 3

[0032] Example 3, the hot-rolled coil of steel for high-plasticity welded gas cylinders, the mass percentage of chemical composition is: C: 0.14%, Mn: 0.75%, P: 0.0122%, S: 0.0012%, Als: 0.027% , The balance is Fe and impurity elements.

[0033] The steel undergoes converter smelting, ladle argon blowing, ladle refining furnace refining, and continuous casting. After heating, it enters two-stand rough rolling, and then passes through seven continuous rolling mills for finishing, and finally is cooled and coiled after rolling.

[0034] Among them, the rolling process parameters are: heating temperature 1190°C, bloom opening temperature 1170°C, finishing rolling opening temperature 1000°C, finishing rolling temperature 850°C,

[0035] The cooling process adopts intermittent water curtain laminar cooling, the water cooling rate is 25℃ / S, and the final cooling temperature is 610℃.

[0036] The mechanical properties of welded gas cylinder steel are shown in Table 1.

[0037] The metallograp...

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Abstract

The invention discloses a high-plasticity steel hot-rolled coil for a welded gas cylinder. The high-plasticity steel hot-rolled coil comprises the following chemical components in percentage by mass: 0.10-0.15 percent of C, 0.50-1.50 percent of Mn, 0-0.018 percent of P, 0-0.015 percent of S, 0.015-0.040 percent of Als, and Fe and impurity elements in balance amount; the technological parameters of rolling are as follows: heating temperature is 1180-1220 DEG C, blooming temperature is 1150-1180 DEG C, precision rolling temperature is 950-1000 DEG C, finish rolling temperature is 800-900 DEG C, interval type water curtain layer cooling is adopted in the cooling process, water cooling rate is 10-50 DEG C / S, and final cooling temperature is 600-630 DEG C. the welded gas cylinder steel has a uniform structure, in addition, the strength and plasticity are improved, the performance is stable, the welded gas cylinder forming rate is improved greatly, and the production cost is reduced.

Description

Technical field [0001] The invention relates to the technical field of steel for welded gas cylinders, in particular to a hot-rolled coil of steel for high-plasticity welded gas cylinders and a production process thereof. The steel is mainly used to manufacture steel welded gas cylinders for liquefied petroleum gas. Background technique [0002] The welding gas cylinder manufacturing industry continues to put forward higher requirements for the strength, toughness, and weldability of welding steel, and this development momentum will continue in the next few decades. [0003] The hot-rolled coils of steel used in the manufacture of liquefied petroleum gas steel welded gas cylinders require high strength performance while also requiring high elongation performance, that is, they require excellent plasticity to meet the cold forming performance of the material and improve the formation of welded gas cylinders. Bottle rate. [0004] Welded bottle users at home and abroad have high requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21D8/02
Inventor 王海波朱涛王立涛胡学文王炜王莹赵勇赵伟隽李忠义王小燕金宝安章海
Owner MAGANG (GROUP) HOLDING CO LTD
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