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Damage Analysis of Cold Extrusion Die

Mold is an important process equipment to achieve less and no cutting, and it is increasingly widely used in modern production. In the process of cold extrusion, some important problems that hinder normal production are often encountered, that is, the mold is damaged, mainly manifested in the following three failure types:

(1) Fracture failures such as plastic failure, fatigue failure, creep failure, low-stress brittle failure, medium accelerated failure, etc.
(2) Excessive deformation failure mainly includes excessive elastic and plastic deformation failure.
(3) Cavity surface damage failure such as wear failure, corrosion failure, surface fatigue (pitting or spalling) failure, etc.

When the defects mentioned above occur in the convex and concave parts, qualified extrusion parts cannot be produced, which seriously affects the production plan of the factory. For this reason, the engineering and technical personnel should solve the problems that cause these defects in time. Technicians should promptly resolve key issues causing these defects.

Production practice points out that the bearing capacity, working life, manufacturing accuracy and product qualification rate of each mold depend to a large extent on the chemical composition of the mold steel, the processing quality of the mold parts and the heat treatment process. To produce extruded parts with high economic benefits, the technical and economic effects can only be achieved by considering the aspects of mold structure design, selection of mold materials, machining, heat treatment, and production costs.

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