The manufacturing process of two kinds of iron-based alloy inner bushes with inner and outer splayed or inner splayed

Abstract

The invention relates to a manufacturing process of two kinds of iron-based alloy inner bushings with inner and outer splayed or inner splayed, and the process steps are as follows: (1) Designing a master mold; (2) Manufacturing molds; (3) Selection of alloy materials; ( 4) Melting; (5) Burning; (6) Casting; (7) Slow cooling; (8) Machining; (9) Heat treatment; (10) Pre-inspection; (11) Surface treatment; (12) Deep freezing treatment . Compared with the prior art, the present invention not only overcomes a series of defects of the original non-connected inner and outer figure-shaped bushings, but also the connected inner and outer figure-shaped iron-based alloy bushes produced by the process of the present invention have high yield and high It has the advantages of stable performance, long service life, good wear resistance, good corrosion resistance, convenient installation, greatly improved equipment productivity and expanded application range.

Description

[technical field] [0001] The invention relates to a production process of a bush, in particular to a production process of two iron-based alloy inner bushes with an overall inner and outer splayed shape or an inner splayed shape. [Background technique] [0002] In the extruder industry, the bushing used requires high hardness, high strength, good wear resistance and corrosion resistance, easy replacement of extruded material and cleaning of the inner side of the bushing, and high production capacity per unit time of the equipment. At present, the existing domestic bushing manufacturing methods mainly include: (1) alloy forged steel: high manufacturing cost, large material waste, limited use of materials, and short life; (2) alloy powder centrifugal casting: cumbersome manufacturing process, machining forming It is difficult to keep the same size when pairing, and there is a fatal flaw in the double fight: seam. ①The seams limit the substantial increase in production capacit...

AI Technical Summary

Problems solved by technology

At present, the existing domestic bushing manufacturing methods mainly include: (1) alloy forged steel: high manufacturing cost, large material waste, limited use of materials, and short life; (2) alloy powder centrifugal casting: cumbersome manufacturing process, machining forming It is difficult to keep the same size, and there is a fatal flaw in the double fight: seam

①The seams limit the substantial increase in production capacity of the extruder. ②There are often residual materials in the seams and it is difficult to clean the inner hole. ③The seams sometimes shift and directly cause damage to the screw or bushing.

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