MANUFACTURING METHOD OF MULTILAYER SHELL-CORE COMPOSITE STRUCTURAL COMPONENT

摘要

A manufacturing method of a multilayer shell-core composite structural component comprises the following procedures: (1) respectively preparing feeding material for injection forming of a core layer, a buffer layer and a shell layer, wherein the powders of feeding material of the core layer and the shell layer are selected from one or more of metallic powder, ceramic powder or toughening ceramic powder, and are different from each other, and the powder of feeding material of the buffer layer is gradient composite material powder; (2) layer by layer producing the blank of multilayer shell-core composite structural component by powder injection molding; (3) degreasing the blank; (4) sintering the blank to obtain the multilayer shell-core composite structural component. The multilayer shell-core composite structural component has the advantages of high surface hardness, abrasion resistance, uniform thickness of the shell layer, stable and persistent performance.

主权项

1. A method for manufacturing a multilayer shell-core composite structural component, comprising:
preparing feedstocks of a shell layer, a transition layer and a core layer for powder injection molding, respectively, each of the feedstocks being formed by mixing a main powder of one of the three layers, a binder and an additive comprising a surface active agent and a plasticizer, wherein the main powder of the transition layer comprises at least one mixed powder formed by mixing the main powder of the shell layer with the main powder of the core layer at a ratio; performing a powder injection molding with the feedstocks, to obtain a green body of the multilayer shell-core composite structural component comprising the shell layer, the transition layer and the core layer; performing debinding on the green body of the multilayer shell-core composite structural component; and sintering the green body of the multilayer shell-core composite structural component after being debound, to obtain the multilayer shell-core composite structural component, wherein either of the main powder of the core layer and the main powder of the shell layer is made of a powdered toughening ceramic material, and the other of the main powder of the core layer and the main powder of the shell layer is made of a metal powdered material.