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Method for improving strip threading stability of hot continuous rolling thin-specification strip steel

A thin gauge and stable technology, applied in metal rolling, temperature control and other directions, can solve the problem of high scrap rate, and achieve the effect of increasing rolling load, improving strip stability and good effect.

Pending Publication Date: 2022-05-06
ANYANG IRON & STEEL
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Problems solved by technology

[0003] The invention proposes a method for improving the threading stability of hot continuous rolling thin-gauge strip steel, which solves the problem of high scrap rate in the thin-gauge strip-threading process in the prior art

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them.

[0019] Angang's 1780mm hot continuous rolling finishing mill consists of a 7-stand continuous rolling mill. The steel strip produced by this unit is mainly composed of carbon and manganese with a carbon content of ≤0.2% and a manganese content of ≤2%. Thin gauge steel strips with a thickness of ≤2mm have poor strip threading stability during production, and strip deviation and rolling waste are relatively high. Many, which seriously affect the strip shape and surface quality, especially the thin-gauge automotive steel with tensile strength ≥ 600Mpa is an important brand product of this production line, and the quality assurance of such products has higher requirements on the stability of strip threading , through the specific implementatio...

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Abstract

The invention relates to the field of metal material processing, discloses a method for improving the threading stability of hot continuous rolling thin-specification strip steel, and aims at solving the problem that the rejection rate is high in the threading process of the thin-specification strip steel in the prior art, the following scheme is provided: step 1, the finish rolling starting temperature FT0 is controlled to be 1090-1130 DEG C, and the finish rolling finishing temperature FT7 is controlled to be 900-920 DEG C; step 2, setting load distribution coefficients, namely accurately setting the load distribution coefficients of the racks F1-F7 respectively; thirdly, the adjusting speed of the automatic thickness adjusting device AGC is set, and the speed of the automatic thickness adjusting device AGC is adjusted to range from 0.8 mm / s to 1.0 mm / s; step 4, setting the tension of the loop between the racks F1-F7: setting the tension of the loop between the racks F1-F7; and fifthly, the positions of finish rolling side guide plates are set, and the positions of the side guide plates on the F1-F7 machine frames are set. The strip threading stability of the thin-specification strip steel can be effectively improved, and a powerful guarantee is provided for continuous and stable operation of thin-specification strip steel production.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a method for improving the strip threading stability of hot continuous rolling thin-gauge steel strips. Background technique [0002] In hot continuous strip production, strip threading stability is the basis for stable production of thin gauges and an important symbol to measure the production level of a rolling line. Due to the large temperature drop in the rolling process of thin-gauge steel strips, the rolling workpiece is easy to deviate, and the thickness setting accuracy is high, it is easy to cause rolling waste during the strip threading process. Frequent rolling waste accidents seriously affect the production line. Benefits, for this reason, this program designs a method to improve the stability of strip threading in hot continuous rolling of thin gauge strips. Contents of the invention [0003] The invention proposes a method for improving the strip-threadin...

Claims

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Application Information

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IPC IPC(8): B21B1/26B21B37/74
CPCB21B1/26B21B37/74
Inventor 杨立庆饶静商存亮邓杭州
Owner ANYANG IRON & STEEL
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