首页>
外国专利>
NET-SHAPE OR NEAR NET-SHAPE POWDER ISOSTATIC PRESSING PROCESS
NET-SHAPE OR NEAR NET-SHAPE POWDER ISOSTATIC PRESSING PROCESS
展开▼
机译:净形或近净形粉末静压过程
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method of producing a net or near net-shape component from metal powder comprises producing an insert of accurate dimensions corresponding to the dimensions of a bore to be created in the finished component, the bore having a length of at least 750mm, supporting the insert within a mould cavity, filling the mould cavity with metal powder, subjecting the powder to isostatic pressing, and subsequently removing the material of the insert. The mould can be an independent mould that is removed after an initial step to bind the powder together into a pre-form, and the pre-form is then encapsulated in a suitable containment, such as a canister or a sprayed coating. The insert can be a metallic insert of a material, such as copper, that is subsequently removable by chemical etching. The insert can be coated with a material that is amenable to removal by etching, and to enable the insert to be extracted. A metallic insert can be coated with a material that provides a diffusion barrier to prevent the material of the insert from diffusing by atomic diffusion into the powder being consolidated during HIPing.
展开▼