Rolling method of small and medium shipbuilding flat-bulb steel

A small and medium-sized ball technology, applied in the field of section steel rolling, can solve the problems of backward production technology, high tooling consumption, poor surface quality, etc., and achieve the effect of improving surface quality, improving production efficiency, and reducing rolling passes.

CN108787742AInactive Publication Date: 2018-11-13ANGANG STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a rolling method of small and medium shipbuilding flat-bulb steel. A direct rolling method is used for rolling the small and medium shipbuilding flat-bulb steel, and relevantrolling equipment includes 3-5 three-roller section steel mills, and all the three-roller section steel mills are horizontally arranged. The rolling process comprises the steps of (1) rough rolling, specifically, a box-type hole is rolled, and a special-shaped flat-bulb steel section is rolled on a rolled piece; (2) intermediate rolling, specifically, metal of a bulb and a web is distributed, thespecial-shaped rolled piece subjected to rough rolling is forced to be widened through large reduction to complete metal distribution of the bulb and the web at a time, and the metal proportion is setaccording to the proportion of finished flat-bulb steel; and (3) finish rolling, specifically, the rolled piece subjected to intermediate rolling and approximate to the flat-bulb steel is variably rolled to obtain an inclination angle of the bulb, and the aspect ratio of the bulb and the web of the finished flat-bulb steel is ensured. By adoption of the rolling method of the small and medium shipbuilding flat-bulb steel, the objectives of high yield and low consumption can be achieved during batch production of the shipbuilding flat-bulb steel, the work efficiency can be improved, the marketrequirement is met, and the benefits of enterprises are increased.
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Description

technical field

[0001] The invention relates to the technical field of section steel rolling, in particular to a rolling method of small and medium-sized shipbuilding flat bulbs. Background technique

[0002] Bulb flat steel is a key structural steel in shipbuilding steel. Small and medium-sized bulb flat steel refers to a bulb flat steel with a web width of less than 160mm; with the development of the shipbuilding industry, the demand for bulb flat steel continues to increase. At the same time, the requirements for its finished product rate are getting higher and higher. At present, the production technology of domestic bulb flat steel is relatively backward, the yield rate is low, the consumption of tooling is high, and the surface quality is poor. Therefore, the development of a new rolling process of bulbous flat steel for shipbuilding has become an important research goal for domestic steel rolling mills. Contents of the invention

[0003] The invention provides a r...

Examples

Embodiment Construction

[0027] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0028] A rolling method of small and medium-sized shipbuilding flat bulbs according to the present invention adopts a direct rolling method for rolling, and the rolling equipment includes 3-5 shifts of three-roller type steel mills, and each shift of three-roller type steel mills is divided into rows layout; the specific rolling process includes the following steps:

[0029] 1) Rough rolling, including several passes of rolling process; in this step, box-shaped pass rolling is completed, and the rolled piece is rolled out of a bulbous flat steel special-shaped section;

[0030] 2) Intermediate rolling, including several rolling passes; in this step, the distribution of the metal amount between the ball head 1 and the web 2 is completed; the rough-rolled special-shaped rolled piece is forced to widen by a large reduction, and it is completed at one...