Brief Introduction of Continuous Casting Technology of Stainless Steel Packaging Steel Strip

Brief Introduction of Continuous Casting Technology of Stainless Steel Packaging Steel Strip
　　 The content of impurities in stainless steel and high stainless steel alloys is low. During the solidification process, there are few oxides and other substances that precipitate and adhere to the graphite mold. The friction between the strip and the graphite mold, that is, the drawing resistance of the strip is not large. , A simple 'pull-stop' procedure is sufficient. Only when the precipitation on the surface of the strip increases and even affects the surface quality, it is necessary to introduce the process. The liquid-solid two-phase interval of pure metal during solidification is narrow, so a small stroke should be used to avoid the formation of large columnar crystals. In order to keep the average pulling speed constant, a low instantaneous high frequency program can be used. Small stroke, low instantaneous speed and high frequency are the basic conditions to ensure the quality of stainless steel and high stainless steel alloy strips.
　　 During the solidification process of oxygen-containing stainless steel, the carbon of the graphite mold material itself and the sub-stainless steel oxide in the stainless steel liquid chemically consume carbon, and pits may appear on the surface of the graphite mold. At this time, the drawing resistance of the strip will increase. In severe cases, cracks appear on the surface of the strip. In this case, if the casting temperature and the drawing speed are appropriately increased, the solidification front position of the strip relative to a certain constant area of u200bu200bthe graphite mold can be moved backward, that is, over the roughened section of the graphite mold surface, thereby improving the strip The surface quality.