Process of rolling stainless steel coil in conventional hot continuous rolling production line

A technology of stainless steel and hot continuous rolling, which is applied in metal rolling, manufacturing tools, metal rolling, etc. It can solve the problems of stainless steel scratches, large rolling force, and large temperature difference between head and tail, and achieve the effect of saving production costs

Inactive Publication Date: 2013-06-19
湖南华菱涟源钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, domestic enterprises that can use conventional hot rolling production lines to produce stainless steel mainly include Taiyuan Iron and Steel, Anyang Iron and Steel, Meishan Iron and Steel, etc. Common problems in the production of stainless steel It is: ①Because stainless steel has high requirements on the stability of heating temperature, it is easy to produce a dense oxide layer during the heating process, resulting in difficulty in descaling; ②When rolling thin stainless steel, the rolling force is large, and the temperature difference between the head and the tail is too large, resulting in The roll

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The stainless steel slab with a thickness of 150㎜ is cold-packed into the walking beam heating furnace. The burners in the preheating section are all closed. The stainless steel slab is in the furnace for 200 minutes. Scaling machine descaling, open the header on the roughing descaling machine, the water outlet pressure is 18MPa, after the slab is descaled, it will be rolled in the roughing mill for 5 consecutive passes to form an intermediate slab with a thickness of 30mm, and the final roughing rolling temperature is 1070℃ , the intermediate billet enters the hot coil box through the intermediate roller table and is uncoiled. After the uncoiled intermediate billet passes through the flying shear head, it is sent to the finishing descaling machine. One of the headers of the finishing descaling machine is opened, and the outlet water pressure is 18MPa. After finishing and descaling, the intermediate billet enters the finishing tandem rolling unit with seven stands and ...

Embodiment 2

[0023] The 250mm thick stainless steel slab is cold loaded into the walking beam heating furnace. The burners in the preheating section are all closed. The stainless steel slab is in the furnace for 300 minutes. Scaling machine descaling, open the header on the roughing descaling machine, the water outlet pressure is 20MPa, after the slab is descaled, it will be rolled in the roughing mill for 7 consecutive passes to form an intermediate slab with a thickness of 35mm, and the roughing final rolling temperature is 1100℃ , the intermediate billet enters the hot coil box through the intermediate roller table and is uncoiled. After the uncoiled intermediate billet passes through the flying shear head, it is sent to the finishing descaling machine. One of the headers of the finishing descaling machine is opened. The scaled intermediate slab enters the finishing rolling mill with seven stands to be rolled into strip steel with a thickness of 3.5mm. The final rolling temperature of ...

Embodiment 3

[0025] Cold pack a stainless steel slab with a thickness of 200mm into a walking beam heating furnace. The burners in the preheating section of the heating furnace are all closed. The stainless steel slab is in the furnace for 250 minutes. When the stainless steel slab reaches the target temperature of 1250°C Out of the furnace, the stainless steel slab after being out of the furnace enters the rough rolling and descaling machine, and the header on the rough rolling and descaling machine is opened, and the outlet water pressure is 19MPa. The stainless steel slab (coarse) is descaled and then advanced to the rough rolling mill for 6 consecutive passes to be rolled into an intermediate slab with a thickness of 35mm. The final rolling temperature of the rough rolling is 1150°C. The intermediate billet passes through the intermediate roller table, passes through the flying shear head, and then is sent to the finish rolling and descaling machine. One of the headers of the finishin...

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PUM

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Abstract

The invention discloses a process of rolling a stainless steel coil in a conventional hot continuous rolling production line. A stainless steel slab with the thickness of 150-250mm is placed in a heating furnace, the tapping temperature of the slab is 1200 DEG C-1300 DEG C, the time when the slab is in the furnace is 150-400min, the slab is taken out of the furnace and continuously rolled for 5-7 times after being descaled through a rough rolling descaling machine, and a medium slab is manufactured. The medium slab enters a hot coiling box through a middle roller way for uncoiling, is cropped through a flying shear, and enters a fine continuous rolling mill composed of seven machine frames after being descaled through a fine rolling descaling machine so as to be manufactured into strip steel with the thickness of 2.2-3.5mm. The strip steel enters a coiling machine after being cooled through laminar flow and is coiled to form a steel coil. The rolling process does not need increasing of equipment investment, is stable in rolling, high in comprehensive yield and good in quality of the surface of the strip steel, and has application and popularization value.

Description

[0001] technical field [0002] The present invention relates to a stainless steel rolling process, in particular to a process (method) for rolling (thin gauge) stainless steel coils on (or utilizing) a conventional hot continuous rolling production line. [0003] Background technique [0004] At present, domestic enterprises that can use conventional hot rolling production lines to produce stainless steel mainly include Taiyuan Iron and Steel Co., Ltd., Anyang Iron and Steel Co., Ltd., Meishan Iron and Steel Co., Ltd., etc. The common problems in the production of stainless steel are: ① Due to the high stability of the heating temperature of stainless steel, It is easy to produce a dense oxide layer during the heating process, which makes descaling difficult; ② When rolling thin gauge stainless steel, the rolling force is large, and the temperature difference between the head and the tail is too large, resulting in unstable rolling, poor shape, and easy tail flicking in fin...

Claims

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Application Information

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IPC IPC(8): B21B1/26B21B37/74B21B45/08
Inventor 廖志刘建华张结刚刘助兵汪净
Owner 湖南华菱涟源钢铁有限公司
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