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Rolling method for high-strength coiled screw

A high-strength, screw-on technology, used in temperature control, metal rolling, rolling force/roll gap control, etc., can solve the problems of low production efficiency, environmental pollution, and high cost, and achieve high production efficiency and environmental pollution. , the effect of low cost

Pending Publication Date: 2021-03-26
冷水江钢铁有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a rolling method of high-strength snails, which aims to solve the technical problems of high cost, environmental pollution and low production efficiency in the prior art under the condition of ensuring the strength of snails

Method used

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  • Rolling method for high-strength coiled screw

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Embodiment 1

[0052] A billet of preset standard is obtained through continuous casting of molten steel, and the billet of preset standard is 170×170mm 2 billet, heating the billet in a heating furnace to raise the temperature of the billet, and taking the billet out of the furnace when the temperature of the billet is 980±10°C;

[0053] The steel slab after being heated and released from the furnace is sent to the rough rolling mill to be rolled into a billet according to pass types K28, K27, K26, K25, K24 and K23. K28, K27, K26, K25, K24 and K23 stands are controlled, so that when the billet is rolled by the rough rolling group, the rolling force of the rolling mill in the rough rolling group is increased, and the rolling temperature is reduced, The relationship between the two is to increase the rolling force by 15% for each stand of the rolling mill and reduce the rolling temperature by 30-40°C.

[0054] After the billet passes through the rough rolling unit, a section of water cooling...

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Abstract

The invention provides a rolling method for a high-strength coiled screw. The rolling method comprises the steps that billet steel is heated to (980+ / -10) DEG C; the billet steel is fed into a roughing mill set to be rolled into a billet, the rolling force of mills in the roughing mill set is increased, and the rolling temperature is reduced; the temperature of the billet is controlled to be 980-990 DEG C after the billet passes through the roughing mill set; the billet is fed into a medium / pre-finishing mill set to be rolled into a blank, the temperature of the blank after rolling is controlled to be (990+ / -10) DEG C, and the temperature of the blank is adjusted to be (860+ / -10) DEG C; the blank is fed into the finishing mill set to be rolled into twisted steel, and the rolling temperature of a tail rack of the finishing mill set is adjusted to be (950+ / -10) DEG C; the temperature of the twisted steel rolled from the tail rack of the finishing mill set is adjusted to be (860+ / -10) DEGC; and the twisted steel discharged from a laying head is rolled into the coiled screw, the temperature is adjusted to (930+ / -10) DEG C, and the coiled screw is conveyed to a roller way to be subjected to bottom blowing. By means of the rolling method, the cost is low, the environment is not polluted,the production efficiency is high, and the steel strength of the coiled screw can be improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a rolling method of high-strength coiled snails. Background technique [0002] Pan snail, also known as pan snail steel, is a major building material. In the actual application process, there are high requirements on the performance of pan snail steel. Therefore, the production of pan snail steel needs strict control. The smelting of pan snail steel As an important link in the production process of snail steel, it has a key influence on the performance of snail steel. [0003] The production of snails mainly includes smelting and rolling. At present, the domestic method of producing high-strength hot-rolled ribbed steel bars with a diameter of ≤10mm and small specifications of HRB400 and above on high-speed wire rolling mills is mainly to microalloy the molten steel. Although the microalloying treatment can improve the strength of the screw steel, the production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/18B21B37/74B21B37/58
CPCB21B1/18B21B37/58B21B37/74
Inventor 杨锦华
Owner 冷水江钢铁有限责任公司
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