Light thin wall H shaped steel concurrent heating and rolling method
An H-beam, thin-walled technology, used in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of excessive temperature drop, low finishing temperature, unevenness, etc.
Inactive Publication Date: 2008-11-19
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0008] Aiming at the deficiencies in the prior art, the present invention provides a method for supplementary hot rolling of light-weight thin-walled H-shaped steel. The purpose of the method is to compensate for the excessive drop in temperature of the rolled piece during the rolling process due to the excessively thin wall thickness of the rolled piece. Reduce the rolling force and moment to solve the problems caused by the production of hot-rolled light-weight thin-walled H-shaped steel due to the rapid temperature drop caused by the thin wall of the light-weight thin-walled H-shaped steel, too low finishing temperature and uneven temperature of the web and flange. question
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Embodiment 1
[0025] Three sets of induction heating devices are installed behind the H-beam universal rolling mill in a certain factory. The layout of the process flow is as follows figure 1 shown. The size of the billet used for the rolled H-shaped steel is 300mm-200mm special-shaped billet, and the finished size of the H-shaped steel is H100×50×5×7. The billet is firstly rolled for 3 passes in the universal rough rolling mill unit, mainly for induction heating of the web, the heating power is 400KW-800KW respectively, and the frequency is 1500HZ to make the temperature of the web plate and the flange basically the same, and then rolled on the universal finish rolling mill unit During the finish rolling, the induction heating device is used to heat the web and the flange respectively to ensure that the finish rolling temperature is above 850 °C, and after the finish rolling, the web plate of the cooling rolling piece is supplemented by heat on the cooling line , to ensure that the temper...
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The invention provides a concurrent heating rolling method of light-weight thin-wall H-beam and belongs to the technology field of metal plastic processing forming. The method comprises the following steps: firstly adopting the normal H-beam rolling technology to roll the steel billet into the H-shaped rolled piece which is provided with a web and a flange, respectively carrying out the concurrent heating of the web and the flange by an induction heating device installed in the production line when the web and the flange are rolled to the thicknesses of lower than 8mm during the process that the rolled piece enters an intermediate mill and a finishing mill, and then rolling. The method is adopted to compensate for the excessively reduced temperature of the rolled piece during the rolling process due to the excessively thin wall, and reduce the roll force and the moment; and the method solves the problems of the size over-tolerance and the unequal performance of the hot-rolling light-weight thin-wall H-beam production caused by the excessively rapid temperature drop and the excessively low finishing temperature due to the small thickness difference among the light-weight thin-wall H-beam wall, the flange and the web and the temperature non-uniformity of the web and the flange. The method of the invention is also suitable for the production of other thin-wall sections such as I-beam, U-beam, flat bulb steel, angle steel, etc.
Description
Technical field: [0001] The invention belongs to the technical field of metal plastic processing and molding, and in particular relates to a supplementary heat rolling method for light-duty thin-walled H-shaped steel. Background technique: [0002] Lightweight thin-walled H-shaped steel is mainly used as purlins and beams of light steel structures. Its shape is characterized by narrow flanges, less wide-edge specifications, and thinner flanges and webs. At present, the production of light thin-walled H-shaped steel is mainly produced by welding. [0003] Compared with the current hot-rolled H-shaped steel, hot-rolled light-weight thin-walled H-shaped steel products are much lighter in weight. They have the characteristics of large section modulus, light weight, metal saving, and strong bearing capacity. They can replace welded H-shaped steel and cold-formed steel products of corresponding sizes. [0004] Therefore, the current production of light thin-walled H-shaped steel ...
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Login to View More IPC IPC(8): B21B1/088B21B15/00
Inventor 钱健清陈其伟吴保桥吴结才
Owner ANHUI UNIVERSITY OF TECHNOLOGY