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Continuous welding production method of light H-type steel

A production method and technology for H-beams, applied in the field of deep processing of steel, can solve the problems of low efficiency and output, inability to continuously produce, and high production costs, and achieve the effects of high production efficiency, high utilization rate, and reduced structural weight.

Inactive Publication Date: 2003-04-23
CENT IRON & STEEL RES INST
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Problems solved by technology

[0003] In the prior art, there are two production methods of large H-shaped steel, one is hot rolling, one billet or slab is rolled into one H-shaped steel, the length is limited, and cannot be continuously produced, and the other is welding, which is welded by thicker steel plates. It is usually welded by submerged arc welding, and the efficiency is very low
For light H-shaped steel, due to the thin wall, it cannot be produced by hot rolling, but can only be produced by welding. Typical welded light H-shaped steel is produced by carbon dioxide gas shielded welding (such as Chinese patents 98206807.7 and 97243388.0), using single-piece intermittent Welding method, its production cost is high, and its efficiency and output are low

Method used

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  • Continuous welding production method of light H-type steel

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Embodiment Construction

[0033] Adopt the continuous welding production method of light H-shaped steel according to the present invention, according to decoiling, straightening, shear butt welding, loop storage, web pier edge, pre-assembly, high-frequency welding, accelerated cooling, straightening and sizing According to the shearing process, 4 batches of light H-beams were produced. The type of strip steel used, the size of the light H-beam and the cut-to-length length of the final section steel are shown in Table 1. The process parameters to be controlled in the process flow: the pressure of the belly pier, the pressure between the pre-assembled two kinds of strip steel The micro-tension, high-frequency welding parameters, and accelerated cooling rate are listed in Table 2.

[0034] batch number

[0035]

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Abstract

The continuous welding production method of light H-type steel includes the following processes: decoiling band steel, flatening, shearing but-welding, loop stoage, web edge-upsetting, preassembling,high-frequency welding, quick-cooling, flatening drawing, length shearing. The parameters of every process are: edge-upsetting pressure is 500-8000 kgf, microtension of band steel before welding is 50-1000 Kgf, welding speed is 10-50 m / min., welding power is 100-1000 KW, and cooling speed is 1-30 deg.C / s.

Description

technical field [0001] The invention relates to the field of deep processing of steel and the field of welding. Background technique [0002] Large H-shaped steel and light H-shaped steel have been more and more widely used in the fields of construction and bridges, especially with the development of light steel structures in the construction field, the demand for light H-shaped steel is more urgent. [0003] In the prior art, there are two production methods of large H-shaped steel, one is hot rolling, one billet or slab is rolled into one H-shaped steel, the length is limited, and cannot be produced continuously, and the other is welding, which is made by welding thicker steel plates. As a result, submerged arc welding is usually used, and the efficiency is very low. For light H-shaped steel, due to the thin wall, it cannot be produced by hot rolling, but can only be produced by welding. Typical welded light H-shaped steel is produced by carbon dioxide gas shielded weldin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K13/00B23K31/02B23K37/04
Inventor 冯光宏孟宪成周和敏刘浏李光瀛李太中
Owner CENT IRON & STEEL RES INST
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