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

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...

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 rolling is unstable, the plate shape is poor, and the finish rolling is easy to flick. The reason is that the high-temperature deformation resistance of austenitic stainless steel is more than twice that of ordinary carbon steel, which leads to an increase in rolling force, which directly causes roll wear and also Increased the difficulty of plate shape control; ③Stainless steel is prone to scratches and curls; ④Stainless steel is rolled at high temperature, which is easy to generate dust pollution on site, and because the high-temperature production of stainless steel makes the equipment easy to damage after long-term baking