A rolling method of symmetrical spherical flat steel for large shipbuilding

A spherical flat steel, symmetrical technology, used in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of insufficient metal filling of the ball head, high labor intensity of operators, and low accuracy of web width, etc. Internal tissue defects, improving mechanical properties and mechanical properties, and controlling the effect of surface oxidation

Active Publication Date: 2020-04-24
ANGANG STEEL CO LTD
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Problems solved by technology

[0003] At present, the domestic large-scale civil symmetrical spherical flat steel for marine use is in the research and development stage, and the rolling process has the following deficiencies: the installation of the guide plate is difficult, the labor intensity of the operators is high, the amount of metal filling in the ball head is insufficient, and the web width accuracy is not high; web wave

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  • A rolling method of symmetrical spherical flat steel for large shipbuilding
  • A rolling method of symmetrical spherical flat steel for large shipbuilding

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Embodiment Construction

[0023] The specific embodiment of the present invention will be further described below, but it is not used to limit the scope of the present invention:

[0024] The rolling method of a kind of large-scale marine symmetrical flat bulb steel of the present invention, the symmetrical bulbous flat steel used for shipbuilding above 30# is the large-scale marine symmetrical bulbous flat steel, which is rolled by skew rolling, and the rolling equipment includes 1 carriage and two Roller profile mills, 3-5 shifts of three-roller profile mills, each rack of three-roller profile mills are arranged in rows, and the specific rolling process includes the following steps:

[0025] 1) Rough rolling, including several passes of rolling; in this step, box-shaped pass rolling is completed, and the bloom is rolled into a bulbous flat steel special-shaped section through several passes;

[0026] 2) Intermediate rolling, including several rolling passes; in this step, the distribution of the meta...

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Abstract

The invention relates to the technical field of flat-bulb steel rolling, in particular to a rolling method of symmetric flat-bulb steel for large-scale shipbuilding. The oblique rolling method is adopted for rolling. A rolling device comprises a two-roller type section mill, three to five three-roller type section mills, wherein the three-roller type section mills are arranged transversely. The specific rolling process comprises the following steps of rough rolling, moderate rolling, frictional ring arrangement, fine rolling and forced cooling after rolling, wherein high-pressure water mist issprayed by using a water cooling device, and accurate cooling is performed by accurately adjusting a bulb and the flow of web plate water mist. By adopting the oblique rolling method, the installingdifficulty of a foreplate and the labor intensity of steel rolling workers are reduced on the premise that the problem of insufficient length of each roller body is solved; the bulb metal filling amount and web plate width precision are ensured; by arranging frictional rings, web plate waves are avoided, and the surface quality of rolled pieces is improved.

Description

technical field [0001] The invention relates to the technical field of rolling flat bulbs, in particular to a method for rolling symmetrical flat bulbs for large shipbuilding. Background technique [0002] Bulb flat steel is a medium section mainly used in the field of shipbuilding and bridge building, among which the marine bulb flat is an auxiliary medium section for shipbuilding. Bulb flat steel for ships plays a vital role in the hull structure, and is an indispensable special profile for the construction of 10,000-ton ships, various ocean-going, coastal, inland water ships, and various types of ships. [0003] At present, the domestic large-scale civil symmetrical spherical flat steel for marine use is in the research and development stage, and the rolling process has the following deficiencies: the installation of the guide plate is difficult, the labor intensity of the operators is high, the amount of metal filling in the ball head is insufficient, and the web width a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/08B21B45/02
CPCB21B1/0805B21B45/0215
Inventor 方志刚丁宁卜俊男黄永阔刘思洋
Owner ANGANG STEEL CO LTD
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