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Method for straightening bent square billet

A technology for straightening and billet, which is applied in the field of straightening and bending billet, can solve the problems of high production cost and billet waste, achieve the effect of reducing the quantity and improving the satisfaction

Inactive Publication Date: 2015-05-20
ANYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the continuous casting slab produced under the above technical conditions does not meet the quality requirements, it is often necessary to finish the continuous casting slab. The whole billet is often not favored by customers because of its lightness after rolling, and the waste of billet is serious, and the production cost is high

Method used

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  • Method for straightening bent square billet
  • Method for straightening bent square billet
  • Method for straightening bent square billet

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] Such as figure 1 and figure 2 Shown, a kind of method for straightening curved billet comprises the following steps:

[0018] 1) Laying a slab 3 under the bent billet 1, the length of the slab 3 is greater than or equal to the length of the bent billet 1;

[0019] 2) Place the curved billet 1 flat on the slab 3, and spread one or more slabs 2 of the same length on the curved billet 1;

[0020] 3) The starting temperature of the slab is 700 0 Above C, naturally cool and keep the pressure for at least 4 hours.

[0021] Table 1 and Table 2 show the bending billet and finishing conditions, and Table 3 shows the situation of using the present invention to process the bending billet. (The billet produced without furnace number meets the quality requirements)

[0022] Table 1 9 furnaces of 35CrMo produced on July 16, 2013

[0023]

[0024] Table 2 ...

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Abstract

The invention relates to a method for straightening a bent and deformed square billet in the technical field of continuous casting, in particular to a method for straightening the bent square billet. The method includes the following steps that firstly, a plate billet is laid below the bent billet, and the length of the plate billet is larger than or equal to the length of the bent billet; secondly, the square billet is horizontally laid on the plate billet with the bent face facing upwards, and one or more plate billets with the same length are laid on the bent billet; thirdly, the starting temperature of the plate billets is more than 7000 DEG C, and the plate billets are naturally cooled, and pressing is kept for at least four hours. According to the method, operation is easy and convenient, the billet yield of the continuous billet is increased, and the production cost is saved.

Description

technical field [0001] The invention relates to a method for straightening a bent and deformed billet applied in the technical field of continuous casting, in particular to a method for straightening a bent billet. Background technique [0002] The overturning cooling bed of the continuous casting machine is a kind of equipment that can make the billet cool evenly, quickly cool down, and realize self-straightening. Cr-Mo series alloy cold-heading steel casting slabs are often cambered after the continuous casting machine turns over the cooling bed, and the bending deformation of the continuous casting slabs is often caused by the stress concentration of its internal structure. The phase structure is different, the linear expansion coefficient of different metal materials is different, and the expansion coefficient of metal materials is greatly affected by temperature, the greater the expansion coefficient is affected by temperature, the greater the volume change during the p...

Claims

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Application Information

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IPC IPC(8): B21D1/00
CPCB21D1/00
Inventor 吴红广张殿军牛重军王冠军赵振华
Owner ANYANG IRON & STEEL
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