Examples of castings HIPed in large volumes include, but are not limited to: Hot section and structural gas turbine components (both dynamic and static); aerospace structural and engine parts; implantable medical devices; automotive engine components; valve bodies and other petrochemical processing equipment; critical munitions pieces; and tooling, die and general engineering parts.
Every week a typical Bodycote HIP plant will process many tons of titanium, aluminium, steel and superalloy castings. Most cast metals can be HIPed such as stainless steel and alloys of nickel, cobalt, titanium, chromium, aluminium, copper and iron. A few materials may be unsafe due to safety or cross-contamination risks (e.g. lead and cadmium).
During the HIP process, castings are subjected to elevated pressure and temperature for a prescribed length of time. This allows surrounding material to flow into internal pores and diffusion to occur to eliminate the voids. Pressure is applied by a high purity inert gas so the casting composition is not affected. Bodycote works closely with customers to meet their specifications and to determine optimum processing parameters.