Method for removing bright trace on surface of strip steel
A technology for eliminating strips and strips, applied in the field of steel rolling, can solve problems affecting the stability of strip rolling and complicated methods
Active Publication Date: 2015-05-06
BEIJING SHOUGANG CO LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a method for eliminating bright strips on the surface of strip steel, which solves the technical problem that the method for eliminating surface defects of strip steel in the prior art is complicated and at the same time affects the rolling stability of strip steel
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The method for eliminating the bright band on the surface of the steel strip provided by the embodiment of the present invention uses the method and control means involved in the present invention to carry out SDX51D, SDX52D and ZSAC1 three kinds of low-carbon aluminum killing on a 2250mm six-stand hot rolling production line. The rolling of 100 pieces of steel, a total of 300 pieces, the specific process parameters are shown in Table 1. The rolling specification is 3.5×1525mm. Replacement; when the pinch roller has no tension on the strip before coiling, the pinch roller presses down on the strip with a pressure of 10-15KN; when the pinch roller has tension on the strip before coiling, the pinch roller uses Lift mode or constant tension mode.
[0020] Table 1 Key points of process control, ℃
[0021]
[0022] Table 2 State of process water
[0023]
[0024]
[0025] Referring to Table 2, the continuous casting slabs of 3.5 × 1525mm specifications and grades ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for removing a bright trace on the surface of strip steel, and belongs to the technical field of steel rolling. The method comprises the following steps of: putting a continuous casting billet of the strip steel into a heating furnace, roughing, finishing, and coiling. The method is characterized in that in the roughing step, a first roughing mill performs first-pass rolling, a double-row header is opened for descaling, descaling pressure is not lower than 18MPa, a second roughing mill performs first-pass, second-pass, third-pass and fifth-pass rolling, odd-even passes are matched for descaling, and the descaling pressure of first-pass, second-pass, third-pass and fifth-pass rolling is not lower than 18MPa; and in the finishing step, six frames are used for continuous rolling, the double-row header is opened for descaling, and descaling pressure is not lower than 20MPa. By the method, through reasonable optimization and adjustment of a hot rolling process, the defect of the bright trace on the surface of the strip steel is overcome, and technical guarantee is provided for producing a hot-rolled plate coil with high stamping performance and surface quality by a continuous annealing process.
Description
technical field [0001] The invention belongs to the technical field of steel rolling and relates to a method for eliminating bright bands on the surface of strip steel. Background technique [0002] In the hot rolling production process, the slab is heated at high temperature. Since the slab is in contact with oxidizing gas at high temperature, a thick layer of oxidizing substance is formed on the surface of the slab, which is iron oxide scale. When entering the rough rolling area, the slab needs to be treated The surface of the slab is descaled by high-pressure water to avoid the iron oxide scale from being pressed into the slab during the rolling process, thereby affecting the surface quality level of the final product. If the hot rolling process is not properly controlled, it will cause the defects of scale indentation, which will hinder the improvement of product quality, and lead to defects such as cracks, indentations, and galvanized interlayers in the finished strip s...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/08B21B45/02
Inventor 陈瑾关建东吴耐王伦曹瑞芳李树森武军宽刘兰宵
Owner BEIJING SHOUGANG CO LTD