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A control method for cross-bending defects of thin-gauge low-carbon steel

A control method and low-carbon steel technology, applied in the field of metallurgy, can solve problems such as reduced elongation and increased strip strength, and achieve the effect of increasing the yield and increasing the yield

Active Publication Date: 2021-05-14
RIZHAO BAOHUA NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method is limited to raw material hot-rolled coils with a thickness of 1.5 mm or more. In actual production, when using this method for hot-rolled coils of 0.7-1.5 mm in hot-rolled production lines, due to the process characteristics of hot-rolled production lines, the produced hot-rolled coils themselves require The strength of the hot-rolled coil produced by the traditional process is higher. If the traditional method is used to reduce the coiling temperature of the entire hot-rolled coil and increase the strength to reduce cross-bending defects, the strength of the strip will increase, the elongation will decrease, and the product quality will be sacrificed.

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  • A control method for cross-bending defects of thin-gauge low-carbon steel
  • A control method for cross-bending defects of thin-gauge low-carbon steel
  • A control method for cross-bending defects of thin-gauge low-carbon steel

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] The process of the invention includes the following steps: feeding → uncoiling → shearing → welding by welding machine → leveling by a tempering machine → entry looper → scale breaking machine → pickling → rinsing → stretching and straightening → exit looper → cutting → coiling.

[0021] Among them, between the export looper and the shearing process, an oiling process can be added according to the production purpose.

[0022] The above process steps can be carried out through the existing metallurgical machinery that can realize the above steps, and can also be optimized for specialized production through a special production line, such as figure 1 As shown, it includes uncoiler 1, inlet shear 2, welder 3, skin passer 4, inlet looper 5, scale breaker 6, pickling section 7, rinsing section 8, tension leveler 9, outlet looper connected in ...

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Abstract

The invention discloses a method for controlling cross-bending defects of thin-gauge low-carbon steel, and relates to the field of metallurgy. The process steps include sequentially connected: feeding, uncoiling, shearing, welding with a welding machine, leveling with a tempering machine, entry looper, Scale breaking machine, pickling, rinsing, pulling straightening, export looper, cutting, coiling. Compared with the prior art, it can reduce the rejudgment rate of cross-bending defects and improve the finished product rate.

Description

technical field [0001] The invention relates to the field of metallurgy, and is specifically aimed at a method for controlling cross-bending defects of 0.7-1.5 mm low-carbon steel hot-rolled raw materials in a pickling production line for a hot-rolling production line. Background technique [0002] With the advancement of steel rolling technology and the development of hot rolling production lines, it is possible to replace cold with hot rolled products. The thickness specification of the hot-rolled sheet is extended to 0.7-4.0mm; the hot-rolled raw material coil yields during the uncoiling process of the uncoiler of the pickling production line, and a cross-bending defect perpendicular to the rolling direction occurs on the surface. [0003] The mechanism of cross-bending defects of hot-rolled coils is mostly due to the existence of the yield platform, and the plastic deformation of the strip will be concentrated in a certain area, thus forming a strip-shaped deformation zo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/06B21B15/00B21B37/00B21B37/48B21B37/74B21C47/18B21C47/26
CPCB23P23/06B21B15/00B21B37/00B21B37/48B21B37/74B21C47/18B21C47/26B21B2015/0064B21B2265/02
Inventor 王野齐林雷李远旭姚广雷徐帅
Owner RIZHAO BAOHUA NEW MATERIAL CO LTD
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