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A method for eliminating pinhole pit defects of pickling board

A pickling plate and pitting technology, which is applied in the field of steel rolling, can solve the problems of pinhole-like pitting and other problems

Active Publication Date: 2019-08-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for eliminating the pinhole-like pitting defect of the pickling plate, which is used to solve the technical problem that the surface of the hot-rolled pickling plate is prone to pinhole-like pitting in the prior art

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  • A method for eliminating pinhole pit defects of pickling board
  • A method for eliminating pinhole pit defects of pickling board
  • A method for eliminating pinhole pit defects of pickling board

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Embodiment Construction

[0032] The embodiments of the present invention provide a method for eliminating pinhole-like pitting defects of pickling plates, which solves the technical problem that pinhole-like pitting easily occurs on the surface of hot-rolled pickling plates in the prior art. The technical effect of simply and effectively eliminating pinhole-like pits on the surface of the pickling board is realized.

[0033] In order to solve the technical problems in the above-mentioned prior art, the general idea of ​​the technical solution provided by the embodiment of the present application is as follows:

[0034] After the slab is heated, it is released from the furnace at a low temperature, and the temperature of the furnace is controlled at 1160°C-1200°C;

[0035] performing rough rolling and finish rolling on the heated slab to obtain strip steel, wherein, in the finish rolling process, controlling the finish rolling inlet temperature to be 950°C-1000°C, and controlling the finish rolling tem...

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Abstract

The embodiment of the invention discloses a method for eliminating pinhole-shaped pock flaws on the surface of a pickling plate. The method comprises the steps that a plate blank is subjected to low-temperature tapping after being heated, and the tapping temperature is controlled to be 1160-1200 DEG C; the heated plate blank is subjected to rough rolling and finish rolling to obtain strip steel, wherein in the finish rolling process, the finishing rolling inlet temperature is controlled to be 950-1000 DEG C, and the final rolling temperature is controlled to be 830-870 DEG C; according to the thickness of the strip steel, the strip steel is subjected to pulling and straightening treatment, wherein in the pulling and straightening process, the pulling and straightening inserting amount of pulling and straightening equipment is set to be larger than 20 mm; and the pulled and straightened strip steel is subjected to pickling to obtain the pickling plate. By adoption of the method, the technical problem that pinhole-shaped pocks are prone to occurring on the surface of a hot rolling pickling plate is solved, and the technical effect of easily and effectively eliminating the pinhole-shaped pocks on the surface of the pickling plate is achieved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for eliminating pinhole-like pitting defects in a pickling plate. Background technique [0002] Hot-rolled pickled sheet is an intermediate product with high-quality hot-rolled sheet strip as raw material. After the oxide layer is removed and trimmed in the pickling production line, the surface quality and use requirements are between hot-rolled sheet and cold-rolled sheet. It is a partial cold-rolled sheet. An ideal substitute for rolled plates. Hot-rolled pickled products are being more and more used in the automobile manufacturing industry due to their unique advantages such as surface quality and process energy saving, and have become mainstream materials for high-end car chassis, wheels, and safety components. [0003] Hot-rolled pickling boards have high requirements on surface quality. In actual production, it is found that pinhole-like pits appear on the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74B21B37/00B21B45/06B21B1/22
Inventor 刘文鑫于洋王林王畅郭子峰李瑞恒陈斌李玉鹏吕宝峰周娜尼兴李景庆宋春华
Owner SHOUGANG CORPORATION
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