processingdetails

Isostatically Pressed

Isostatically pressed powdered metal forming is a process utilizing isostatic presses to compact powdered metal into a molded part using extreme, uniform pressure. Isostatically pressed can be categorized into hot isostatic pressing (HIP) and cold isostatic pressing (CIP).

The HIP process subjects a component to both elevated temperature and isostatic gas pressure in a high pressure containment vessel. The pressurizing gas most widely used is argon. An inert gas is used, so that the material does not chemically react. The chamber is heated, causing the pressure inside the vessel to increase. Many systems use associated gas pumping to achieve the necessary pressure level. Pressure is applied to the material from all directions.

In the process of cold isostatic pressing (CIP), it uses a fluid mixture, usually an oil-water mixture or a hydraulic fluid, to compact powder metal into a mold. The high, uniform pressure ensures a high density mold is achieved. Hot isostatic pressing utilizes an extremely hot gas environment to create extreme pressure for the compaction process.