Hot isostatic pressing (HIP) is a process that uses high temperatures and isostatically applied gas pressures to achieve near-net shape and full density of the material being processed.
The maximum pressure for HIP can range from 15,000 psi to 44,000 psi (100 MPa to 300 MPa).
This process combines high temperatures, reaching up to 2,000°C, with isostatically applied gas pressures.
The pressure is applied using an inert gas such as argon.
The main goal of HIP is to achieve near-net shape and full density of the material being processed.
The process involves hermetically sealing powder in a container that is flexible at elevated temperatures.
This sealed container is then heated within a pressurized vessel.
The material is held at these conditions for a specified time.
The pressure medium, usually an inert gas, is pressurized at pressures ranging from 100 to 300 MPa (15 to 45 ksi).
The temperature for HIP is material dependent.
Typical production equipment can heat parts from 1,000 to 1,200 °C (2,000 to 2,200 °F).
HIP allows for better uniformity of compaction.
It can also be used to compact more complex forms.
It's important to note that HIP applies isostatic pressure using gas pressure.
In contrast, hot pressing applies only uniaxial pressure.
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