Fan-shaped section for relieving and eliminating loosening of interior of plate blank and using method thereof
A segmental section and loosening technology, which is applied in the field of improving and eliminating the internal loosening of the slab. It can solve the problems of being unable to bear the reaction force of the slab, increasing the reduction amount, thin rollers in the segmental section, etc., and achieves the elimination of internal loosening. The effect of shrinkage cavity, reduction of compression ratio, and increase of finished product thickness
Inactive Publication Date: 2019-06-25
BAOSTEEL ENG & TECH GRP
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Problems solved by technology
[0004] The maximum reduction amount of the conventional sector section will not exceed 2mm. The main reason is that the rollers of the sector section are relatively thin, and the increase of the reduction amount cannot bear the reaction force brought by the slab. Due to the limitation of the structural type At present, all kinds of conventional sectors of slab continuous casting machine cannot meet the above functions, so it is necessary to invent a new type of sector to meet the above functional requirements
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[0021] like figure 1 Shown: A fan-shaped segment for improving and eliminating looseness inside the slab, including an upper frame 1 and a lower frame 2 hinged together, the upper frame is located directly above the lower frame, and also includes three pairs of small free rollers 3 and a pair of driving rollers 4. A pair of large free rollers 5, driving roller pressing down cylinder 6 and horizontal cylinder 7;
[0022] The bottom of the upper frame is rotatably provided with at least three small free rollers, a driving roller and a large free roller sequentially through bearings, and the top of the lower frame is rotatably provided with at least three small free rollers and a driving roller sequentially through bearings. The central axes of the roller and a large free roller, the small free roller, the driving roller and the large free roller are all parallel to each other, and the roller surfaces of each pair of small free rollers, a pair of driving rollers and a pair of lar...
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Abstract
The invention relates to a fan-shaped section for relieving and eliminating loosening of the interior of a plate blank and a using method thereof. The fan-shaped section comprises an upper frame and alower frame which are hinged together, and the upper frame is located over the lower frame. The fan-shaped section further comprises three pairs of small free rollers, a pair of driving rollers, a pair of large free rollers, a driving roller screwdown oil cylinder and a horizontal oil cylinder. The using method comprises the following steps that a casting blank enters through an inlet of the fan-shaped section, the solidified tail end of a liquid core of the casting blank is made to be located at the roller gap between the pair of large free rollers, 10-15mm reduction is applied to the casting blank through a large free roller screwdown oil cylinder, when reduction is applied, the large free rollers of the lower frame are lifted up through the horizontal oil cylinder, and after extrusionis finished, the casting blank is output through an outlet of the fan-shaped section. Through the fan-shaped section, internal loosening and shrinkage of the casting blank are eliminated, and the quality of the interior of the casting blank is improved.
Description
technical field [0001] The invention relates to an improvement of a slab during casting, in particular to a method for improving and eliminating the loose segment inside the slab and its application method. Background technique [0002] Wide and thick continuous casting slabs generally have the problems of internal center segregation, center porosity and shrinkage cavity, resulting in certain quality defects of the casting slab, which seriously affects the mechanical properties of the steel. Practice has proved that the dynamic soft reduction technology can effectively solve the center segregation inside the slab, but it has little effect on the problems of porosity and shrinkage cavity inside the slab. In order to solve the problems of porosity and shrinkage cavity inside the slab, the current common practice is to increase the compression ratio during the rolling process of the slab. The study found that the internal porosity and shrinkage cavity of the slab are mainly fo...
Claims
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IPC IPC(8): B22D11/12B22D11/128
Inventor 王明安刘瑜
Owner BAOSTEEL ENG & TECH GRP