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Hot rolling process of wide flat bar steel

A technology of flat steel and technology, which is applied in the field of rolling technology of hot-rolled wide flat steel, can solve the problems of increasing the production cost of steel structural parts, labor and auxiliary material consumption, and the unsightly appearance of steel structural parts, so as to improve the internal Organize, improve product yield, clear edges and corners

Inactive Publication Date: 2006-11-08
江阴博丰钢铁有限公司
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Problems solved by technology

Therefore, the process is complicated, the consumption of steel is large, and the consumption of labor and auxiliary materials increases the production cost of steel structural parts.
In addition, thin slabs produced by medium-sized rolling mills can also be used instead, but the largest width of thin slabs is only 280mm, which can only be used in small-sized steel structures, and the two sides are arc-shaped, making welding operations difficult
The steel structure made is also unsightly and can only be used for flange plates

Method used

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  • Hot rolling process of wide flat bar steel

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Embodiment Construction

[0019] see figure 1 , the specific process steps of the rolling process of hot-rolled strip wide flat steel of the present invention are as follows:

[0020] The continuous casting rectangular billets (thickness 150-220mm, width 150-600mm, length 6000mm) purchased from various steelmaking plants are divided into steel types, specifications and furnace numbers after entering the factory, and are stacked in the raw material yard respectively. According to the production plan, hoist 2 to 4 of the above-mentioned continuous casting rectangular billets to the chain-type steel loading device 1 in sequence, move them to the feeding roller table 2 after finishing and leveling, and send them to the heating furnace after being aligned, and then push the steel The machine 3 is pushed into the heating furnace 4 (using the gas produced by the gas generator as fuel), and after about 2 hours of heating, the steel billet is heated to 1050 ° C ~ 1150 ° C. According to the rolling rhythm, the t...

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Abstract

The hot rolling process of wide flat bar steel includes the following steps: heating continuously cast rectangular steel billet at 1050-1150 deg.c inside heating furnace, coarse edge rolling in an edger, descaling in a descaling unit, repeated rolling in a two-roller reversing mill, cutting ends in a hot shearing machine, finish rolling in a finishing mil group, chilling to 475-525 deg.c in a water cooler, cooling to below 200 deg.c in a cooling bed, cutting ends in a cold shearing machine, lengthing in a shear gauge, shearing to certain length in a cold shearing machine, collecting and baling. The present invention provides wide flat bar steel in certain sizes for building and bridge.

Description

Technical field: [0001] The invention relates to a rolling process of hot-rolled strip-shaped wide flat steel with a thickness of 6-25 mm, a width of 150-600 mm and a rectangular cross-section. It belongs to the technical field of steel production. Background technique: [0002] Wide flat steel is mainly used for flange plates and webs of steel structures in buildings and bridges. The steel materials traditionally used for the flange and web are formed by shearing or flame-cutting steel plates and joining them. Therefore, the process is complicated, the consumption of steel is large, and the consumption of labor and auxiliary materials increases the production cost of steel structural parts. In addition, thin slabs produced by medium-sized rolling mills can also be used instead, but the largest width of thin slabs is only 280mm, which can only be used in small-sized steel structures, and the two sides are arc-shaped, making welding operations difficult. The resulting stee...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B15/00B21B37/00B21B45/02B21B45/08
Inventor 吴协德缪洪达陶葵军瞿建忠
Owner 江阴博丰钢铁有限公司
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