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Material management system and method for hot-rolled steel plate

A hot-rolled steel plate and management system technology, which is applied in metal rolling, metal rolling, rolling mill control devices, etc., to achieve the effect of improving the factory yield

Active Publication Date: 2019-07-16
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the steel sheet whose material is improved by controlling rolling conditions and cooling with high precision, a structure prediction model with a level of prediction accuracy that can replace the structure information sensor is unknown.

Method used

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  • Material management system and method for hot-rolled steel plate
  • Material management system and method for hot-rolled steel plate
  • Material management system and method for hot-rolled steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Hereinafter, Embodiment 1 of the present invention will be described. first, figure 1 It is a figure which shows the facility structure of the finish rolling stage of the hot rolling facility of Example 1 of this invention.

[0033] exist figure 1 In the finish rolling stage of the shown hot rolling equipment, the steel plate 1 is rolled in the final stand 31 of the finish rolling mill, passes through the run-out table 4, and is then coiled by the coiler 5 . Such a structure is a known structure. In the output roller table 4 , the steel plate 1 is placed on conveying rollers 41 and passes through a plurality of cooling beds 42 . Each cooling bed 42 has a plurality of cooling heads 421 , and each cooling head 421 also has a plurality of cooling nozzles 422 . Each cooling bed 42 also has a plurality of lower surface cooling heads 423 , and each lower surface cooling head 423 has a plurality of lower surface cooling nozzles 424 .

[0034] In order to cool the steel pl...

Embodiment 2

[0119] Figure 13 shows other embodiments of the present invention. Embodiment 1 described above is carried out using the output of the temperature detection device 654 instead of the intermediate thermometer 63 whose position is fixed. The plurality of collectors 651 arranged on the output roller table 4 collect the light emitted from the steel plate 1 at a plurality of positions on the output roller table 4 . The collected light is input to the switching device 653 via the optical beam 652 . The switching device 653 selects the collection part 651 collected by the collection part 651 with the smallest separation distance among the collection parts 651 separated from the position of the cooling head 421 that discharges the cooling water toward the winding device 5 side by a distance greater than or equal to the strip-shaped water disappearance distance L_X. light, and output it to the temperature detection device 654. The temperature detection device 654 interprets the lig...

Embodiment 3

[0122] Figure 14 shows another embodiment of the present invention. Embodiment 1 described above was carried out using the output of the non-contact thermometer 661 movable in the longitudinal direction of the steel plate 1 by the moving rail 662 instead of the intermediate thermometer 63 at a fixed position. The non-contact thermometer 661 measures the temperature of the steel plate 1 at a position away from the cooling head 421 where the cooling water is discharged toward the coiler 5 side by the strip water disappearance distance L_X. The technique of this example is more complicated than that of Example 1, but it has the effect of improving the calculation accuracy of the slow cooling history by measuring at a position close to the slow cooling start temperature TMP_SS. In addition, compared with Example 2, maintenance becomes complicated due to the addition of moving parts, but there is an effect that the temperature of the steel plate 1 is measured at a position closer...

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Abstract

The present invention provides a material management system for a hot rolled steel sheet and a method therefor. It is not necessary to newly provide a special sensor, and to improve the yield even if a material deviation occurs in the longitudinal direction of the hot rolled steel sheet. The material management system of the hot-rolled steel sheet is rolled by the final rolling stand of the finish rolling mill of the hot rolling mill through a winding device, and is then wound up in a steel sheet cooled in the output table, comprising: a slow cooling history material retention table which stores correlation data between the slow cooling history and the material determined empirically with respect to the steel sheet;and a material distribution evaluation means for obtaining the data of the corresponding material by using the slow cooling temperature history obtained by the slow cooling temperature history calculating means and referring to the slow cooling history material correlation table retention means and estimating the material quality based on the data of the obtained material distribution of steel .

Description

technical field [0001] The present invention relates to a material management system and method for a steel plate produced by hot rolling. Background technique [0002] In a steel plate having a length of more than 1000 m produced by hot rolling, variation in material quality tends to occur in the longitudinal direction due to changes in rolling conditions and cooling conditions during the production process. In particular, in recent years, by controlling rolling conditions and cooling with high precision, steel sheets with improved materials according to their uses have been produced. Such steel sheets are more likely to have material variations due to changes in rolling conditions and cooling conditions. Therefore, material management has become more important. [0003] Conventionally, for quality control, a test piece is cut out from the tail end or front end of a steel sheet wound into a coil, and a tensile test or the like is performed to manage the quality of the stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00
CPCB21B37/00B21B2261/21
Inventor 朴珉奭鹿山昌宏林刚资
Owner HITACHI LTD
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