Method for improving rolling stability of container thin material

Abstract

The invention relates to a method for improving the rolling stability of a container thin material. By reasonably configuring a rolling plan, optimizing process technical parameters, improving a process schedule, taking temperature control as a principle line and adopting a series of effective technical measures such as strictly controlling a heating mechanism, a rough rolling production process, a finish rolling production process and the like, the rolling stability of the container thin material is improved; head folding, whipping and strip blocking accidents of stripped steel are reduced; punch mark and scratch phenomena of a roller, stripped steel deviation and loop fluctuation in a rolling process are avoided; and the strip shape and the surface quality of the container thin material are improved so that the rolling success ratio is up to 99 percent. Simultaneously, accident processing workload is reduced, rolling mill operating rate and product yield are improved, contract implementation rate is ensured and enterprise goodwill and economic benefit are improved.

Description

technical field [0001] The invention belongs to the field of steel rolling technology, and in particular relates to a method for improving the stability of finish rolling of container thin-gauge steel strips and improving the pass rate of finished product quality. Background technique [0002] Since the thickness of the thin-gauge steel strip for making containers is relatively thin, only 1.2 to 2.0mm, it is almost close to the limit specification of hot-rolled thin-strip steel plates, and the steel type used for rolling container thin-strips is SPA-H. The resistance to plastic deformation in the process is large, so rolling instability is prone to occur in the finishing rolling production process. Due to the factors of unstable rolling, during the finishing rolling process, the strip steel is prone to accidents such as head-folding or tail-flicking accidents at the rear, and damages such as scratch marks and waxing on the rolls, which seriously affect the subsequent strips....

AI Technical Summary

Problems solved by technology

[0002] Since the thickness of the thin-gauge steel strip for making containers is relatively thin, only 1.2 to 2.0mm, it is almost close to the limit specification of hot-rolled thin-strip steel plates, and the steel type used for rolling container thin-strips is SPA-H. The resistance to plastic deformation is large during the process, so rolling instability is prone to occur during the finishing rolling production process

Due to the factors of unstable rolling, during the finishing rolling process, the strip steel is prone to accidents such as head-folding or tail-flicking accidents at the rear, and damages such as scratch marks and waxing on the rolls, which seriously affect the subsequent strips. steel surface quality

At the same time, unstable rolling also causes problems such as strip deviation and abnormal fluctuation of the looper during the rolling process of the strip, which brings great difficulty to the adjustment of the finishing rolling operation, and even steel jamming accidents, especially in the finishing It is very difficult to control the strip shape during the rolling process, which reduces the rolling production efficiency and increases the scrap and accident rate

According to statistics, the rolling success rate of container thin material is only about 70%.

Once the rolls are stamped and waxed due to the head-folding or tail-flicking accidents of the strip, the rolls must be changed; when the steel jamming accident occurs, the waste products still need to be processed while the rolls are being changed. These defects and accidents are not only It seriously affects the surface quality and normal delivery of strip steel products, and affects the operating rate of the rolling mill and the smooth progress of production, causing great economic losses

In addition, after the roll change, the rolling line needs to modify the finished thickness specifications of a certain number of strips, and make a transition to continue rolling thin gauges. The steel strips with changed specifications cannot be delivered as required and the contract can be fulfilled, which in turn affects the pass rate of container thin strips. and performance rate, which will have a negative impact on corporate reputation

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