JPS6026816B2 - Continuous annealing equipment row - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Rentsugi scorching anchor equipment line, and more particularly to a Rentsugi scorching hammer equipment line suitable for use in composite structure high-tensile steel plates.

In general, cold-rolled steel sheets are extremely hard and have poor workability such as bending and deep drawing, so they are annealed, and also because it is necessary to meet the demands for surface composition and shape of the final product. Sea bream rolling is applied.

Conventionally, the Rentsugi annealing equipment line has not been equipped with a temper rolling equipment on the entry side. As with general cold-rolled steel sheets, after dulling, the steel sheets are temper rolled to adjust the surface structure and correct the shape.

However, when a composite structure high-strength steel sheet is temper-rolled after being competitively hammered, the yield stress increases, and low yield stress is required for products such as automobile outer panels, which require good formability and shape fixability. There is a problem that it can no longer be used for things that require it.

In this regard, when attempting to adjust the surface texture before dulling, it may be possible to use a roll with an appropriate roughness in the final stand of the cold rolling process, but such a method requires high speed and Since the steel plate is processed in a stand with a high rolling reduction rate, the phase of the steel plate deteriorates in a short period of time, and the PPI value of the surface roughness is lower than in the case of skin pass rolling, so the galling resistance during pressing is reduced. It is difficult to obtain a steel plate that satisfies strict requirements regarding appearance properties after coating, such as gloss and gloss after coating. The present invention focuses on the above-mentioned conventional problem 1 and provides a continuous dawn anchor equipment array that can significantly reduce yield stress and obtain a composite structure high-strength steel plate with excellent press formability and shape fixability. The purpose is to

In order to achieve the above object, the Rentsugi brick anchor equipment line according to the present invention is constructed by arranging skin-pass rolling equipment for surface roughness adjustment and shape correction on the entry side of a continuous Akatsuki hammer furnace, and By passing the steel through the line, it was possible to obtain a composite structure high-strength steel plate with significantly lower yield strength and excellent shape.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a continuous dawn anchor equipment array according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a configuration diagram of a continuous dawn anchor equipment array according to an embodiment.

This continuous knee anchor equipment row is equipped with a bay-off reel 12 for rewinding and feeding the strip 10, and the next stage of this bay-off reel 12 is the leading end of the strip that is rewound from the bay-off reel 12. A welding machine 14 is installed for welding the leading strip and the trailing end of the leading strip. The strip 10 carried out from the welding machine 14 is subjected to a subsequent electrolytic cleaning device 16 to remove dirt such as oil and iron powder adhering to the surface, and then supplied to the input side looper 1.8. The strip 10 that has passed through the entry looper 18 is supplied via an entry bridle 20 to a conditioning rolling facility 22 that performs surface roughness adjustment and shape correction. This temper rolling equipment 22 is
The purpose is to transfer a roughness that is satisfactory as a finished product to the surface of the strip 10 and give it a shape within a range that is acceptable as a finished product. A continuous brazing furnace 26 is provided downstream of the temper rolling equipment 22 via an exit bridle 24 .

The continuous annealing furnace 26 is comprised of a heating zone 28, a soaking zone 30, and a cooling zone 32, and after heating the strip 10 carried in, it is soaked at a predetermined temperature for a certain period of time, and then cooled. The next stage of such a continuous slowing furnace 26 is
An exit looper 34 and a tension reel 36 for winding up the strip 10 are installed. In such a line of Houzuki anchorage equipment, the strip 10, which has been loaded into a bio-reel 12 and carried out, welded and cleaned, is transferred to a continuous pseudo-hammer furnace 2.
After the surface structure is adjusted to a satisfactory degree and the shape is corrected by the yield rolling equipment 22 installed immediately before step 6,
It will be dulled by phosphorus.

Therefore, the composite structure high-strength steel plate manufactured through the Rentsugi sintered anchor equipment line is designed to adjust the roughness at a speed and reduction rate that is compatible with bran hammering, and also to maintain the shape without deteriorating the material quality. It can be corrected. As shown in Fig. 2, the yield strength of the composite structure high-strength steel sheet manufactured in this way is significantly lower than that of the case of continuous hammering followed by skin pass rolling, and in particular, the press workability and shape fixability are significantly lower. It is a suitable material for the required exterior panels of automobiles, etc. In addition, since the surface assemblage does not deteriorate, it is optimal for parts where the gloss of the shape and appearance is a problem. In particular, even when compared with the final stand-trowel surface assembly adjustment of the cold rolling mill, the variation in surface roughness from coil to coil is small and uniform, and effective PPI is obtained.

This has the effect that a better shape can be obtained than when the shape is corrected in the final stand of a similar rolling mill. As described above, the series of continuous annealing equipment according to the present invention has the excellent effect of being able to obtain a composite structure high-strength steel plate with low yield stress and excellent workability and shape fixability.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a series of continuous annealing equipment according to the present invention, and FIG. 2 is a graph diagram showing the relationship between temper rolling reduction and yield stress of a composite structure high-strength steel plate. 10... Strip, 22... Temper rolling equipment, 26... Continuous annealing furnace, 28... Heating zone, 30... Soaking zone, 32... Cooling zone. Figure 2 of the ship

Claims (1)

[Claims] 1. A continuous annealing equipment array characterized in that a skin pass rolling equipment for surface roughness adjustment and shape correction is provided on the entrance side of a continuous annealing furnace consisting of a heating zone, a soaking zone, and a cooling zone.