A method for hot consolidating powder of metallic and nonmetallic composition to form a densified powder article by forming a container of a material which melts at a combination of temperature and time at that temperature which combination would not adversely affect the desired microstructure and physical properties of the densified powder article and applying heat and pressure to the exterior of the container to compact and densify the powder within the cavity at a temperature below the melting point of the container and thereafter melting the container into molten metal to remove the container from the densified powder article while maintaining the temperature of the article below the incipient melting temperature of the article. Thereafter, the material from the melted container may be recycled to form a new container.

Method of hot consolidating powder with a recyclable container material

A method for sonic testing powder metal articles made by hot isostatic pressing in a thick-walled container including the steps of preparing the composite thick-walled container and article for sonic testing by machining sonic surfaces in the exterior surface of the thick-walled container and thereafter sonic testing the article through the walls of the container.

Method of forming and ultrasonic testing articles of near net shape from powder metal

A container for hot consolidating powder of metallic and non-metallic composition and combinations thereof by the application of heat and pressure wherein the container includes a mass of container material which is substantially fully dense and incompressible and is capable of plastic flow at pressing temperatures, a cavity of a predetermined shape formed within the mass for receiving a quantity of powder, the mass including walls around the cavity of sufficient thickness so that the exterior surface thereof does not closely follow the contour of the cavity whereby, upon the application of heat and pressure to the container, the mass acts like a fluid to apply hydrostatic pressure to the powder contained in the cavity.

Container for hot consolidating powder

A method for forming non-equilibrium and/or metastable metallic or non-metallic powder, foil or fine wire material (2) into a solid body comprises charging the material into a metal container (1), subjecting the metal container (1) containing the material to rolling at a temperature at which the inherent properties of the material are maintained, and thereafter removing the metal container (1).

Method for the manufacture of formed products from powders, foils, or fine wires

A method is provided for pressing and forging hot metal powder directly in one operation into a high density metal article of a finished worked shape. The method uses a simple shaped, readily deformable container with loose metal powder therein and substantially closed to allow the powder to evolve its own protective atmosphere during preheat while permitting some gases to escape. The powder-filled container is pressed and forged in one operation in a preheated die cavity resulting in a high density article of a homogeneous composition. The invention is also well suited for cladding powder forged articles and producing composite articles from multiple powder alloys. The invention is particularly useful with powders of aluminum and its alloys.

Method of pressing and forging metal powder

A method of making metal stock utilizing powder metal technology and rolling mill practices The method described comprises filling a container having a contoured interior surface with metal powder, sealing, evacuating and heating the container and cross-rolling the containerized powder in a rolling mill to produce a predictable size and configuration of compacted metal product having properties similar to conventionally rolled or forged stock

Stephen E Chehi

Papers

Method of making cross-rolled powder metal discs