A kind of riser material and preparation method thereof

Abstract

The invention belongs to the technical field of risers, and in particular relates to a riser material and a preparation method thereof. Among them, the riser material, in parts by weight, includes the following components: 20-50 parts of kaolin, 15-30 parts of mullite, 10-20 parts of kyanite, 10-30 parts of alumina, hydroxypropylmethyl 1-3 parts of cellulose, 5-10 parts of sawdust, 5-10 parts of zinc chloride, 5-10 parts of ammonium chloride. The riser material of the present invention does not react with molten metal, does not stick to molten steel, effectively improves the stability and thermal insulation of castings in the process of feeding, and has a remarkable feeding effect, and improves the quality of castings through flaw detection of castings; excellent thermal insulation performance , low thermal conductivity, stable feeding, no sintering, erosion, expansion and other defects in the riser, improve the quality of ductile iron castings, the yield of casting process, improve the utilization rate of feeding molten steel, and save the amount of molten steel.

Description

technical field [0001] The invention belongs to the technical field of risers, and in particular relates to a riser material and a preparation method thereof. Background technique [0002] In casting production, in order to avoid defects such as shrinkage cavity and shrinkage porosity during the solidification process of liquid metal, setting risers in the mold is one of the important means; The liquid metal feeds the casting. [0003] With the progress of modern industry, more and more new materials are applied to the casting process. The application of new materials not only improves the casting process yield and casting quality, but also improves the quality of castings. In the production process of ductile iron castings, in order to ensure the quality of castings, chillers and risers are used in key parts of castings and prone to shrinkage. Generally, it is only to disperse or transfer the shrinkage defects to non-critical parts of the casting. The current production o...

AI Technical Summary

Problems solved by technology

In the production process of ductile iron castings, in order to ensure the quality of castings, chillers and risers are used in key parts of castings and prone to shrinkage. Generally, it is only to disperse or transfer the shrinkage defects to non-critical parts of the casting. The current production of wind power castings and nuclear power castings and other high-demand castings basically does not allow the existence of shrinkage and other defects, so in the production process of these castings Riser is inevitable

For ductile iron castings, the existing risers are unstable during feeding, insufficient feeding and feeding defects affect the intrinsic quality of ductile iron castings

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