At present, a lot of raw materials of building accessories, tombstone accessories and tombstone accessories of Yisheng company are made of stainless steel. Its special characteristics, such as bright and clean, not easy to rust and other inherent properties are very consistent with our production of accessories. Yisheng company has collected and sorted out small knowledge about stainless steel for your reference.

The data comes from the Internet.

1、 Smelting process of stainless steel

At present, the smelting process of stainless steel production in the world is mainly divided into one-step, two-step and three-step, as well as new integrated production methods. One step smelting: hot metal + AOD (argon oxygen refining furnace); two step smelting: EAF (electric arc furnace) + AOD (argon oxygen refining furnace). The three steps are EAF (electric arc furnace) + AOD (argon oxygen refining furnace) + VOD (vacuum refining furnace). In addition to several traditional production processes, the current integrated production process, namely the production process from molten iron directly to stainless steel, is also adopted by many enterprises. The production process is: rkef (rotary kiln electric furnace) + AOD (argon oxygen refining furnace).

2、 Hot rolling process of stainless steel

The hot rolling process of stainless steel takes slab (mainly continuous casting slab) as raw material, which is heated and then made into strip by roughing mill and finishing mill. The hot steel strip from the last finishing mill is cooled to the set temperature through laminar flow, and then rolled into steel coil by coiler. After cooling, the steel coil has oxide skin on its surface, which is black, commonly known as "stainless steel black skin coil". After annealing and pickling, the oxidized surface is removed, which is called "stainless steel white skin roll". Most of the hot-rolled products in the stainless steel market are stainless steel white skin roll. The specific hot rolling process of stainless steel is as follows:

Source: 51bxg

3、 Cold rolling process of stainless steel

After the hot rolling of stainless steel, some of the hot-rolled products are directly used downstream, and some of the hot-rolled products need to be processed into cold-rolled products before use.

For cold rolling of stainless steel, hot-rolled products with the thickness of 3.0-5.5mm are mostly used. After rolling by cold rolling equipment, cold-rolled products of stainless steel are produced. At present, there are two main production processes of stainless steel cold rolling: single stand cold rolling of stainless steel and multi stand cold rolling of stainless steel. The specific production process is as follows:

After the cold rolling of stainless steel, it needs to be annealed and pickled. After cold rolling, the annealing of stainless steel can achieve the goal of softening by eliminating work hardening in the process of recrystallization; the purpose of pickling is to remove the oxide layer formed on the surface of steel strip during annealing, and to passivate the surface of stainless steel to improve the corrosion resistance of steel plate.