point inoculation method

Abstract

The invention relates to a point inoculation device and a point inoculation method. The point inoculation device is characterized by comprising a package, and inoculation materials consisting of inoculators and nodulizers are filled in the package. The point inoculation method includes proportionally mixing the inoculators with the nodulizers to form the inoculation materials; filling the inoculation materials in an inner cavity of the package; fixing the package filled with the inoculation materials to a specific position of a casting required to be subjected to inoculation before the casting is subjected to pouring; and pouring molten metal into a sand mold and enabling the inoculation materials to perform point inoculation for the specific position of the casting. According to the technical scheme, the point inoculation device and the point inoculation method have the advantages that the package is melted after pouring is completed, and the inoculators and the nodulizers are exposed in the molten metal and are reacted with the molten metal, so that inoculation can be implemented for the specific position of the casting, the specific position of the casting is high in nodularity, the metallographic structure and the graphite morphology of the specific position of the casting are improved, and the machining performance of the specific position of the casting is enhanced.

Description

technical field [0001] The invention relates to the technical field of inoculation treatment of cast iron, in particular to a spot inoculation treatment method. Background technique [0002] Inoculation treatment is an important means to improve the performance of cast iron, which can improve the strength of castings, improve the shape and distribution of graphite. The inoculation treatment is time-sensitive, and can be divided into furnace inoculation, back-pack inoculation and flow inoculation according to different addition stages. Furnace inoculation is to add inoculation treatment materials in the smelting furnace; inverted ladle inoculation is to add inoculation treatment materials in the ladle; flow inoculation is to add inoculation treatment materials with flow during the casting process. Although inoculation treatment has been widely used in different stages, poor spheroidization will occur in some special parts such as the root of the riser of the thick casting an...

AI Technical Summary

Problems solved by technology

Although inoculation treatment has been widely used in different stages, poor spheroidization will occur in some special parts such as the root of the riser of the thick casting and the thick wall of the casting, the metallographic structure and graphite morphology cannot meet the requirements, and the processability is poor. And other issues

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