The main functions of adding steel fibers to ceramic fiber blankets are: enhancing toughness, improving stress-strain resistance, and improving mechanical impact resistance; improving thermal shock resistance, improving cracking and spalling resistance; Line shrinks. The amount of steel fiber added is generally 0.6-2.5% (volume ratio).
However, the amount of steel fiber added should not be too large. Excessive addition of steel fiber will deteriorate the high temperature physical and chemical properties of the refractory castable. For example, steel fiber will cause the residual linear expansion of the castable after high temperature burning. At the same time, the content of iron oxide in the castable is increased and its corrosion resistance is reduced. Adding too much steel fiber will also make the workability of the castable worse.
