A hot-rolled steel coil for high-plasticity welded gas cylinders and its production process

A technology of steel for gas cylinders and hot-rolled coils, applied in the field of steel for welding gas cylinders, can solve the problems of not meeting the requirements of suppliers, difficult to obtain uniform structure, etc. stable effect

Active Publication Date: 2016-06-29
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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  • A hot-rolled steel coil for high-plasticity welded gas cylinders and its production process
  • A hot-rolled steel coil for high-plasticity welded gas cylinders and its production process
  • A hot-rolled steel coil for high-plasticity welded gas cylinders and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, the high-plasticity welded gas cylinder steel hot-rolled coil, its chemical composition mass percentage content is: C: 0.12%, Mn: 0.75%, P: 0.0143%, S: 0.0015%, Als: 0.026% , the balance being Fe and impurity elements.

[0023] The steel is smelted in a converter, argon blown in a ladle, refined in a ladle refining furnace, and continuously cast. After being heated, it enters two stands for rough rolling, and then passes through a seven-mill continuous rolling unit for finish rolling. Finally, it is cooled and coiled after rolling.

[0024] Among them, the rolling process parameters are: heating temperature 1200°C, initial rolling start temperature 1150°C, finish rolling start temperature 1000°C, finish rolling finish temperature 890°C,

[0025] The cooling process adopts interval water curtain laminar flow cooling, the water cooling rate is 18°C / S, and the termination cooling temperature is 630°C.

[0026] The mechanical properties of welded gas cylinder st...

Embodiment 2

[0027] Example 2, the high-plasticity welded gas cylinder steel hot-rolled coil, its chemical composition mass percentage content is: C: 0.13%, Mn: 0.73%, P: 0.0112%, S: 0.0010%, Als: 0.029% , the balance being Fe and impurity elements.

[0028] The steel is smelted in a converter, argon blown in a ladle, refined in a ladle refining furnace, and continuously cast. After being heated, it enters two stands for rough rolling, and then passes through a seven-mill continuous rolling unit for finish rolling. Finally, it is cooled and coiled after rolling.

[0029] Among them, the rolling process parameters are: heating temperature 1200°C, initial rolling start temperature 1165°C, finish rolling start temperature 950°C, finish rolling finish temperature 895°C,

[0030] The cooling process adopts interval water curtain laminar flow cooling, the water cooling rate is 19°C / S, and the termination cooling temperature is 625°C.

[0031] The mechanical properties of welded gas cylinder ste...

Embodiment 3

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

[0033] The steel is smelted in a converter, argon blown in a ladle, refined in a ladle refining furnace, and continuously cast. After being heated, it enters two stands for rough rolling, and then passes through a seven-mill continuous rolling unit for finish rolling. Finally, it is cooled and coiled after rolling.

[0034] Among them, the rolling process parameters are: heating temperature 1190°C, initial rolling start temperature 1170°C, finish rolling start temperature 1000°C, finish rolling finish temperature 850°C,

[0035] The cooling process adopts interval water curtain laminar flow cooling, the water cooling rate is 25°C / S, and the termination cooling temperature is 610°C.

[0036] The mechanical properties of welded gas cylinder st...

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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 welding gas cylinders, in particular to a high-plasticity steel hot-rolled coil for welding gas cylinders and a production process thereof. The steel is mainly used for manufacturing steel welding gas cylinders for liquefied petroleum gas. Background technique [0002] The welding gas cylinder manufacturing industry has continuously 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 steel coils used in the manufacture of liquefied petroleum gas steel welded gas cylinders require high strength and high elongation properties, that is, excellent plasticity is required to meet the cold stamping properties of materials and improve the yield of welded gas cylinders. bottle rate. [0004] The welding bottle users at home and abroad have high requirements on the bottle...

Claims

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Application Information

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Patent Type & Authority Patents(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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