Production method of preventing from coiling and pulling narrow of hot-rolled low carbon strip steels used for cold-rolled base plates

Abstract

The invention discloses a production method of preventing from coiling and pulling narrow hot-rolled low carbon strip steels used for cold-rolled base plates, which comprises the following steps of: (1) controlling hot rolling, and heating plate blanks to 1190 to 1250 DEG C with temperature differences of the same plate equal or less than 40 DEG C; (2) carrying out rough rolling by adopting a 2-stage-3-point short stroke control with an outlet temperature of 1030 to 1080 DEG C; (3) carrying out finishing rolling at a temperature of 860 to 900 DEG C; (4) measuring thicknesses and widths of hot rolled steel coils; (5) carrying out laminar cooling; (6) setting each lead rate and coiling tension and coiling at a temperature of 560 to 670 DEG C; and (7) carrying out acid cleaning and cutting. The invention completely solves the problem of coiling and pulling narrow the hot-rolled low carbon strip steels used for the cold-rolled base plates by controlling hot rolling temperatures, short strokes of rough rolling, coiling lead rates, and coiling tensions.

Description

technical field The invention relates to the technical field of hot-rolled low-carbon steel strips for cold-rolled substrates, in particular to a manufacturing method for preventing coiling and narrowing of hot-rolled low-carbon steel strips for cold-rolled substrates. Background technique At present, the annual demand for low-carbon hot-rolled strip steel for cold-rolled base materials in China is very large, about 15 million tons, while the annual consumption in Jiangsu and Zhejiang regions alone reaches more than 3 million tons. During the production process of the hot tandem rolling unit, after the strip is finished rolling, it is cooled by laminar flow (hot output roller table), and after being pinched by the roller, it enters the coiler to be coiled into a steel coil, and then it is used for pickling in the cold rolling mill. Edge trimming and cold rolling production, hot rolling production specifications are generally between 1.8--4.5mm, and cold rolling specification...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is to provide a manufacturing method for preventing the coiling and narrowing of hot-rolled low-carbon strip steel for cold-rolled substrates, so as to solve the problem of instantaneous width narrowing in hot continuous rolling coiling in the prior art

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