304 stainless steel production process summary

Microstructure characteristics of 304 stainless steel

304 stainless steel is a metastable austenitic stainless steel composed of different phases at different temperatures. Usually 304 stainless steel is non-magnetic, but sometimes it has weak magnetic properties due to segregation of components during smelting or improper heat treatment.

On the other hand, when 304 stainless steel is cold worked, the microstructure will also transform to martensite, and the greater the processing deformation, the more martensitic transformation and the greater the magnetism.

Usually, if you want to eliminate the magnetic properties of 304 stainless steel caused by the above reasons, you can restore the stable austenite structure through high temperature solution treatment, so as to eliminate the magnetism.

304 stainless steel production process summary

304 stainless steel is a metastable austenitic stainless steel. Under different temperature conditions, the composition of its phases is different. It is a strong shrinkage steel, and the surface of the casting billet is prone to defects. In industrial applications, the surface quality of the 304 stainless steel billet can be improved by optimizing the nozzle insertion depth, using low-viscosity mold flux, controlling the fluctuation of the liquid level of the mold, optimizing the vibration parameters and cooling system, and realizing the 304 stainless steel billet without repair. Grinding and rolling, improve productivity and save production costs.

Characteristics and uses of 304 stainless steel

Stainless steel is a high-alloy steel with a beautiful surface and good corrosion resistance, and is usually not easily corroded in air or chemical media. The main reason is that stainless steel contains a large amount of chromium (generally more than 12%), and chromium forms a very thin, strong, fine and stable chromium oxide film on the surface of stainless steel, which plays the role of isolating air and resisting chemical corrosion.

304 stainless steel is widely used in the industry, accounting for about 80% of the total stainless steel. It is widely used due to its good corrosion resistance. However, the stainless steel is easily corroded in an environment containing a certain concentration of chloride ions.