Method for forming honeycomb intermetallic compound filter element and die for method

Abstract

The invention relates to a method for forming a honeycomb intermetallic compound filter element and a die for the method. The method comprises the following steps of pressing intermetallic compound materials filling the die cavity into a blank by up-down movement of a pressing head of the die for forming the honeycomb intermetallic compound filter element in a die cavity; then placing the die containing the blank on a demolding base, and enabling the pressing head to move in the die cavity again for forcing the blank together with a mandrel and a base which are used for forming the die cavity to be jointly separated from an external mold of the die; dismantling the pressing head and the base, and enabling the blank and the mandrel to turn into a subsequent sintering link; sintering the mandrel to be combusted and decomposed, and be separated from the blank; and sintering the blank to form the honeycomb intermetallic compound filter element. The method and the die are simple and applicable; as the mandrel can be combusted and decomposed and be separated from the blank when the blank is formed by sintering, the demolding efficiency can be greatly improved; in addition, the conditions that the blank is damaged in appearance, is deformed and the like when the mandrel is separated from the blank are effectively avoided, and the qualification rate of the blank is improved.

Description

technical field [0001] The invention relates to a forming method and a mold for an intermetallic compound filter element, in particular to a method and a mold for forming a honeycomb intermetallic compound filter element. Background technique [0002] Intermetallic compounds refer to compounds formed by metals and metals, metals and metalloids, which have excellent properties such as high temperature resistance, oxidation resistance, and wear resistance, and are widely used. When intermetallic compound materials are used to make the honeycomb filter element, it is common to design the mold to include an outer mold and a plurality of core molds installed in the outer mold. The invention patent application document with the publication number CN102133768A previously applied by the applicant of the present application discloses a production method of a multi-channel filter element cold isostatic pressing mold and an intermetallic compound multi-channel filter element, which sol...

AI Technical Summary

Problems solved by technology

However, the method of forming the intermetallic compound multi-channel filter element by cold isostatic pressing is still cumbersome, and the corresponding mold structure is also relatively complicated, and in the process of the mandrel detaching from the blank, the blank caused by the movement of the mandrel is unavoidable. , deformation, etc.

In addition, isostatic pressing technology is suitable for forming blanks with relatively large length and diameter, and the formability of more complex shapes is poor, and it is difficult to demould

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