Introduction to three stainless steel plate production processes

There are many production processes for stainless steel plates. Among them, the technology with a long history and long-lasting economic and trade is continuous casting, including thin slab continuous casting and thin strip continuous casting. Let’s talk about their development separately below.

Thin slab continuous casting and rolling technology was first used to produce ordinary steel. After the molten steel is poured into a thin slab with a thickness of 40-127mm, it is directly hot-rolled. This eliminates the rough rolling production process of hot-rolled stainless steel strip and reduces the production cost. Small production costs and enhanced competitiveness of steel plates. Thin slab continuous casting and rolling technology began to be used to produce stainless steel plates in the late 1980s, mainly including the Conroll technology developed by Voestalpine and the GSP technology developed by SMS.

Thin strip continuous casting is to directly cast molten steel into stainless steel strips with a thickness of 1-10mm. Using this process to produce stainless steel strips can save the traditional hot rolling mills that produce hot-rolled strips, and can greatly reduce energy consumption. Reduce pollution and reduce production costs in order to achieve the best economic benefits.

The principle of thin strip continuous casting is that molten steel enters the continuous casting machine through the tundish. The continuous casting machine does not have a crystallizer, but has two relatively rotating casting rollers. The molten steel passes through the casting rollers to form a meniscus and begins to solidify. As the billet passes through The gap between the rollers moves downward, the billet shell continues to grow, and the two sides of the billet shell are completely fused together to form a continuous thin strip, which comes out from the bottom of the continuous casting machine.

Although the principle of thin strip continuous casting is relatively simple, it is very difficult to apply it to industrial production. In recent years, due to technological breakthroughs in some important fields, such as molten steel entering the continuous caster technology, initial solidification technology, casting roll side sealing materials, roll deformation and refractory materials, thin strip continuous casting technology has gradually moved from intermediate experiments to industrialization. There are now industrialized thin strip casting machines.

The stainless steel plate cold-rolled strip rolling, annealing, pickling and smoothing continuous production line refers to the modernization model of carbon steel cold rolling technology. It combines the four independent processes in the traditional stainless steel cold-rolled strip production process, that is, the hot-rolled strip annealing and pickling. Washing, cold rolling, cold rolled strip annealing, pickling and smoothing form a continuous production line. The function is to use efficient production to greatly reduce costs and effectively control product quality.