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Narrow Thickness Tolerance Control Method for Thin Gauge Steel Plate in Single Stand Steckel Mill

A technology of thickness tolerance and steckel rolling mill, applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of narrow supply width, large internal stress, and restrictions on the development of the cruise manufacturing industry, and achieve stable control , Reduce batches of unqualified products and improve the effect of enterprise economic benefits and market competitiveness

Active Publication Date: 2022-03-22
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to domestic thin-gauge steel plates with a thickness of less than 6mm, the main coils and flat plates produced by hot rolling mills have problems such as narrow supply width (the maximum is only 2100mm) and large internal stress, which cannot meet the needs of cruise ship construction. Such products At present, there are only a few iron and steel enterprises in the world such as Japan and Europe that can produce in batches. Domestic iron and steel enterprises cannot produce similar products. The market is almost monopolized by foreign enterprises, which seriously restricts the development of my country's cruise manufacturing industry.

Method used

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  • Narrow Thickness Tolerance Control Method for Thin Gauge Steel Plate in Single Stand Steckel Mill
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  • Narrow Thickness Tolerance Control Method for Thin Gauge Steel Plate in Single Stand Steckel Mill

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Embodiment Construction

[0027] The technical scheme of the present invention will be described in further detail below.

[0028] This embodiment selects rolling order thickness 5mm BV-A36, and the whole production process is controlled as follows:

[0029] (1) See Table 1 for specific material design, 1# heating furnace double-row steel loading;

[0030] Table 1 Material design data

[0031]

[0032] (2) Planning arrangement: two rolling pieces will be produced after 512 tons in the middle and early stage of the work roll period, and the production will be controlled within 1000 tons in the middle and early stage of the work roll period. Before production, 2 pieces of 1# heating furnace with a thickness of 5mm will be ordered. BV A36 will be used as the transition blank To adjust the thickness deviation, the width of the 2# heating furnace billet produced at the same time is 3068-3098mm, and all of them are required by the heating system of 1180±20°C.

[0033] (3) See Table 2 for the specific he...

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Abstract

The invention discloses a narrow thickness tolerance control method for thin-gauge steel plates of a single-stand furnace rolling mill, which is characterized in that the billet material shape design, plan arrangement, heating and rolling process for the production of steel plates for a single-stand furnace coil mill are optimized, and the thickness is controlled by controlling the thickness of the steel plate. In terms of material shape design of standard steel slabs, heating temperature of heating furnace, rolling speed during rolling, rolling rhythm and AGC limit, etc., the single-stand steckel rolling mill can stably produce 0.2mm narrow thickness tolerance steel plates. The present invention realizes the stable control of the narrow thickness tolerance of the thin-gauge steel plate of the single-stand furnace rolling mill, and improves the yield rate of the thin-gauge steel plate with a narrow thickness tolerance of 0.2mm in the single-stand furnace rolling mill. It reduces the rejudgment of batch unqualified products caused by the problem of thickness exceeding the narrow thickness tolerance order of the single-stand steckel rolling mill, and improves the economic benefits and market competitiveness of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a steel rolling process for thin-gauge steel plates in a single-stand furnace rolling mill. Background technique [0002] Wide and thin steel plates with a width of 2400-3000mm for thin-gauge large-scale cruise ships. Currently, only a few iron and steel enterprises in the world such as Japan and Europe can mass-produce such products. Domestic iron and steel enterprises are still unable to produce similar products. The monopoly of enterprises seriously restricts the development of my country's cruise manufacturing industry. Compared with conventional medium and heavy plate mills, the single-stand steckel rolling mill has advantages in rolling wide and thin specifications due to its large billet coiling furnace heat preservation rolling method. Thickness tolerances are more difficult to effectively control. [0003] Taking thin-gauge steel plates for large cruise s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/18B21B37/24
CPCB21B37/18B21B37/24
Inventor 李睿鑫刘自扬靳星刘冰欧金雄凌继中张江生
Owner NANJING IRON & STEEL CO LTD
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