A real thermomechanical rolling 180-degree uniform temperature large looper production line or bar equipment

Abstract

The present invention provides a real thermomechanical rolling 180-degree uniform temperature large looper production line or bar equipment, including a middle rolling mill, a temperature uniform device assembly, and a finishing mill; the temperature uniform device assembly is fixedly installed between the middle rolling mill and the finishing mill During the real thermomechanical rolling, the wire rod or bar is rolled at 750-800°C as a rolled piece, and the section along the entire rolled piece direction is in an ultra-fine grain state, and the temperature in the uniform temperature device assembly is controlled at 650-1100°C . This equipment utilizes the existing limited distance between the intermediate rolling mill and the finishing mill, and adds a section of side-mounted uniform temperature equipment assembly, which can effectively increase the cooling distance and cooling time, ensure sufficient cooling capacity, and make the distance between the intermediate rolling mill and the finishing mill The rolled piece continues to be kept at a low temperature without causing the grain fusion to become larger, effectively achieving the purpose of temperature control, so that the material can maintain a good tensile mechanical capacity, and at the same time relatively reduce the need to add manganese, etc. to the material in the steelmaking process. Percentage of precious metals to achieve cost savings.

Description

technical field [0001] The invention belongs to the field of iron and steel rolling equipment, and in particular relates to a real thermomechanical rolling 180-degree uniform temperature large looper production line or bar equipment. Background technique [0002] At present, the production lines of high-speed wire rods (including wire rods) and bars (including rebars) in steel mills are all heated square billets above 1000 degrees through continuous rolling of primary, intermediate rolling mills and final finishing rolling units to obtain diameters below 40mm. The final product is mostly used for construction steel or mechanical materials. Cooling water tanks are generally used for forced cooling between the rolling mill and the rolling mill to avoid the temperature rise of the rolled piece after passing through the rolling mill, resulting in excessive grain size and affecting material properties. . [0003] Under normal circumstances, due to the influence of site layout, t...

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Problems solved by technology

[0003] Under normal circumstances, due to the influence of site layout, the distance between rolling mills generally does not exceed 30m, and the cooling water capacity has a certain limit within this distance. In order to meet the requirements of the current new national standard, the final product can reach The level of qualified standards needs to ensure that the mechanical tensile test of the product sample can meet the most stringent requirements. The material needs to be added with precious metal materials such as manganese and vanadium, which increases the cost, but the mechanical properties of the material cannot be well guaranteed.

[0004] In addition, thermomechanical rolling is to control the rolling temperature of the material, which is a kind of low-temperature controlled rolling. Since the rolling process must always be controlled below the phase transition temperature, the extrusion of the rolling mill and the control of the material temperature are used, thereby Realize the real "thermomechanical rolling", no company has realized the technology of real thermomechanical rolling

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