Production process of ultrathin hot-rolled checkered plate with thickness of 1 mm or below
A production process and checkered plate technology, which is applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of high production cost, reduced profitability, and difficult production of hot-rolled checkered plates, so as to avoid single width specification and wide width The effect of various specifications
Pending Publication Date: 2021-04-23
TANGSHAN YANSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0003] It is very difficult to produce ultra-thin hot-rolled pattern plates, and there are few domestic and foreign manufacturers that can supply them stably. Even in small batches, various production accidents occur frequently, and the production cost is high, resulting in a decline in profitability
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[0030] To produce Q235B pattern plate, the temperature of the slab out of the furnace is controlled at 1250°C, the exit temperature of rough rolling is 1100°C, the exit temperature of finish rolling is 850°C, and the coiling temperature is 640°C. According to the production plan, 4 rolls of 1.0mm×1250mm and 6 rolls of 0.8mm×1250mm Q235B checkered plates were obtained. The performance of the checkered plate obtained: the yield strength is ≥235MPa, the tensile strength is 370~500MPa, and the elongation is ≥26%.
[0031] The present invention provides a method for producing ultra-thin checkered plates below 1.0mm by conventional hot continuous rolling mills, combined with the laminar flow cooling proprietary technology, that is, sparse cooling combined with head cooling and sweeping devices, to solve the problem of producing thin checkered plates by conventional rolling mills Difficult problem, batch and stable production of checkered plates below 1.0mm. The production organizat...
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Abstract
The invention discloses a production process of an ultrathin hot-rolled checkered plate with the thickness of 1 mm or below, and relates to the technical field of checkered plate rolling. According to the production process, a conventional hot continuous rolling mill is adopted, a special production plan is made, rough rolling and finish rolling are carried out on a plate blank from a heating furnace, a technological system is controlled in the rough rolling and finish rolling processes, strip steel is cooled in a head-receding cooling and sparse cooling mode, and the ultra-thin checkered plate with the thickness of 1.0 mm or below is rolled. According to the method for producing the ultrathin checkered plates with the thickness of 1.0 mm or below by using the conventional hot continuous rolling mill, a laminar cooling special technology is combined, namely sparse cooling is combined with a head-receding cooling and sweeping device, so that the problem that it is difficult for the conventional rolling mill to produce thin-specification checkered plates is solved, and the checkered plates with the thickness of 1.0 mm or below are stably produced in batches; and the production organization width of a conventional rolling mill is combined, the width specifications are diversified, the limitation that headless rolling mills are single in width specification is avoided, and production practicability is achieved.
Description
technical field [0001] The invention relates to the technical field of checkered plate rolling, in particular to a production process for ultra-thin hot-rolled checkered plate with a thickness of less than 1 mm. Background technique [0002] Checkered plates are widely used in the fields of construction, ships, transportation and machinery manufacturing due to their elegant appearance, good anti-skid effect and wear resistance. At present, the thickness of checkered plates circulating in the market is generally more than 2.5mm. Under the premise of not affecting the performance and aesthetics, checkered plates should be as lightweight as possible, reducing the thickness of checkered plates and increasing the strength of checkered plates, which can effectively reduce the use of steel. volume, saving production costs. [0003] It is very difficult to produce ultra-thin hot-rolled checkered plates, and there are few domestic and foreign manufacturers that can supply them stabl...
Claims
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IPC IPC(8): B21B1/26B21B27/02B21B37/46B21B37/74B21B45/02B21C47/02
CPCB21B1/26B21B27/02B21B45/0218B21B45/0233B21B37/46B21B37/74B21C47/02
Inventor 康小兵张艳广张颖陈强马立妹任勇张文文董连瑞
Owner TANGSHAN YANSHAN IRON & STEEL CO LTD