Hot rolling process of stainless plate strip coil

A composite strip and stainless steel technology, which is applied in the field of metal pressure processing, can solve problems such as low flatness, rolling accidents, and low yield, and achieve good flatness and surface quality, high strength and plasticity, and a high degree of automation Effect

Active Publication Date: 2010-07-07
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to produce stainless steel composite plate coils with this existing technology, and the production efficiency is low and the yield is low
The length and thickness of stainless steel clad plate products are greatly limited, and the flatness and surface quality of the products are not ideal
[0003] Chinese patent applications 200520056388.3, ​​200510033870.X, 200810025665.2, and 200810025666.7 all proposed a method for brazing composite blanks, but did not describe in detail the hot rolling process for producing composite panels using a medium-sized hot rolling mill
[0004] Since the single-sheet hot-rolled stainless steel clad plate products are mainly medium and thick plates, the thickness and length of the produced stainless steel clad plate coils are strictly limited, and the production efficiency is low and the yield is low.
Therefore, in the multi-pass rolling of stainless steel clad coils, especially in the process of thinner gauges, the insulation of the clad slabs needs to be paid attention to. At low temperatures, the thin clad slabs often suffer from uneven elongation and deformation. Problems leading to low flatness, and even rolling accidents, are unavoidable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A. Put the stainless steel composite slab with thickness×width×length=148mm×1320mm×6150mm into the walking beam type slab heating furnace, heat it to 1100°C and release it from the furnace;

[0023] B. Send the stainless steel clad slab heated in step A to the furnace coil rolling mill. Under the condition that the rolling start temperature is 1050° C., carry out 9 passes of rough rolling (flat rolling) reciprocatingly on the roller table of the steel coil mill until the stainless steel is clad. The thickness of the slab is less than 30mm, and the technical parameters of rolling force, rolling speed and reduction of each pass are shown in 1-9 passes in Table 1;

[0024] C. Send the stainless steel composite slab whose thickness is less than 30mm in step B to the coiling furnace. Under the conditions of the coiling furnace furnace temperature of 550°C and the final rolling temperature of 800°C, the stainless steel composite slab is rolled on the coiling furnace reel Carr...

Embodiment 2

[0029] A. Put the stainless steel composite slab with thickness × width × length = 200mm × 1275mm × 10250mm into the walking beam type slab heating furnace, and heat it to 1270°C to release from the furnace;

[0030] B. Send the stainless steel clad slab heated in step A to the furnace coil rolling mill, and under the condition that the rolling start temperature is 1250°C, carry out 8 passes of rough rolling (flat rolling) reciprocatingly on the roller table of the steel coil mill until the stainless steel is clad The thickness of the slab is less than 30mm, and the technical parameters of rolling force, rolling speed and reduction of each pass are shown in 1-8 passes in Table 2;

[0031] C. Send the stainless steel clad slab with a thickness less than 30mm in step B to the coiling furnace. Under the condition that the furnace temperature of the coiling furnace is 1000°C and the final rolling temperature is 1000°C, the stainless steel clad slab is rolled on the coiling furnace ...

Embodiment 3

[0036] A. Put the stainless steel composite slab with thickness×width×length=200mm×1520mm×10400mm into the walking beam type slab heating furnace, heat it to 1200°C and release it from the furnace;

[0037] B. Send the stainless steel clad slab heated in step A to the furnace coil rolling mill. Under the condition that the rolling start temperature is 1170° C., 11 passes of rough rolling (flat rolling) are reciprocated on the roller table of the steel coil mill until the stainless steel is clad. The thickness of the slab is less than 30mm, and the technical parameters of rolling force, rolling speed and reduction of each pass are shown in 1-11 passes in Table 3;

[0038]C. Send the stainless steel clad slab whose thickness is less than 30mm in step B to the coiling furnace. Under the condition that the furnace temperature of the coiling furnace is 750°C and the final rolling temperature is 900°C, the stainless steel clad slab is rolled on the reel of the coiling furnace Carry ...

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Abstract

The invention provides a hot rolling process of a stainless composite plate strip coil, which comprises the following steps of: heating and sending a stainless composite plate blank to a steckel mill; flatly rolling: repeatedly carrying out rough rolling for a plurality of times under the conditions that a rolling temperature is 1050-1250 DEG C and the rolling speed is smaller than 12.6 mm/min; then, sending into a coiling furnace; carrying out coil rolling: repeatedly carrying out fine rolling for a plurality of times under the conditions that the coiling furnace temperature is 550-1000 DEG C and the final rolling temperature is 800-1000 DEG C; finally, directly sending the plate blank into a coiling machine or after cooling the plate blank to 450-700 DEG C; and coiling to obtain a thinner and longer stainless composite plate strip coil with better flatness and surface quality and higher strength and plasticity. The invention has high working efficiency, yield rate, low consumption, high automation degree and low production cost, and can roll various types of stainless composite plate strip coils with different thicknesses and sizes in a batch of dozens of tons to several hundred of tons and fully utilize the additional rolling equipment to produce.

Description

technical field [0001] The invention relates to a hot-rolling process of a stainless steel composite plate coil, belonging to the technical field of metal pressure processing. Background technique [0002] The stainless steel clad plate is made of industrial pure iron, carbon steel, low-alloy steel or low-priced stainless steel as the base layer, and at least two layers of bimetallic plates with high-priced stainless steel plates as the cladding, and then rolled and heat-treated. energy-efficient materials. The multi-layer stainless steel composite slab composed of the base layer and the cladding layer has a large difference in physical properties such as thermal conductivity and plastic extensibility. Compared with carbon steel, stainless steel has the characteristics of narrow heating and rolling temperature range, fast hardening at low temperature, and high rolling deformation resistance. Therefore, in the process of rolling stainless steel clad strips, due to the large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B37/74B21B37/46
Inventor 王钧洪陈育生阳平杨奇杨豪黄远凤尹丽琼陈伟崔茂祥
Owner WUKUN STEEL
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