HIP Technology
HIP combines temperature, isostatic gas pressure, and hold time in a controlled cycle that closes pores, microcracks, and lack-of-fusion defects through plastic yielding, creep, and diffusion.
Learning Path
Process Sequence
Loading, evacuation or purging, heating, pressurization, holding, controlled cooling, depressurization, and unloading form a traceable process sequence tied to cycle time and quality records.
Cycle Curve
A representative process profile is more useful than a decorative curve. The diagram below illustrates heating, pressurization, holding, and controlled cooling with example data.
| Phase | Time | Temperature | Pressure |
|---|---|---|---|
| Load & purge | 0 h | 25°C | 0.1 MPa |
| Heat & pressurize | 2 h | 900°C | 60 MPa |
| Hold | 4 h | 920°C | 100 MPa |
| Controlled cooling | 6 h | 420°C | 80 MPa |
| Depressurize & unload | 8 h | 80°C | 0.1 MPa |
This illustrative cycle shows the expected data structure only. Final parameters must be validated for the material, load configuration, usable zone, equipment design, and applicable customer standards.
Pressure Mode
Uniform pressure in each direction reduces density gradients and is more suitable for handling complex geometries, internal pores, and highly reliable components.
Equipment Preview
Relate the pressure vessel, usable zone, loading envelope, and process interfaces to the overall equipment architecture.
Core Equipment
The wire-wound structure transfers pressure loads into high-strength steel wire layers and is engineered for sustained operation up to 200 MPa. Usable-zone diameters can scale from Ø100 mm laboratory systems to Ø2000 mm production platforms, with the vessel envelope and process interfaces configured for the application and facility.
Technology Modules
Uniform pressure, high temperature and high pressure cycling, and controlled cooling together determine the final material properties and equipment selection boundaries.
High-pressure inert gas, typically argon, acts uniformly on every exposed surface. Because pressure transfer is independent of die-wall friction, HIP avoids the density gradients associated with uniaxial pressing and is well suited to complex cavities and thin-walled geometries.
Pore closure is governed by plastic yielding, power-law creep, and diffusion. Pressure, temperature, and holding time together determine final density, diffusion-bond quality, and microstructural evolution; process development is therefore based on a pressure-temperature-time map.
Forced convection of high-pressure gas provides faster, more uniform cooling than conventional furnace cooling. The controlled path can reduce distortion and residual stress while enabling integrated HIP and heat-treatment cycles such as HPHT, URC, and URQ.
Material Process Windows
The values of pressure, temperature and holding time of different materials vary greatly, and the following intervals are used to illustrate the typical selection logic.
| Material Family | Pressure | Temperature | Holding time | Process Objectives |
|---|---|---|---|---|
| Titanium alloy (Ti-6Al-4V castings/AM parts) | 100–103 MPa | 890–920°C | 2–4 h | Close internal pores and improve fatigue life; ASTM F3301 is a common reference for AM post-processing |
| Nickel-based superalloy (Inconel 718/625) | 100–103 MPa | 1120–1165°C | 2–4 h | Densification with the option to integrate solution treatment into an HPHT cycle |
| Powder-metallurgy tool steel/stainless steel (H13, 316L) | 100 MPa | 1100–1200°C | 2–3 h | Near-net-shape PM-HIP densification without a separate sintering step |
| Cobalt-chromium alloy (CoCrMo medical implants) | 100 MPa | 1150–1200°C | 2–4 h | Controlled atmosphere, improved fatigue strength, and repeatable implant batches |
| Aluminum-alloy castings (Al-Si series) | 100 MPa | 480–520°C | 2–4 h | Close microporosity and improve elongation in applications such as aerospace castings |
These industry reference ranges illustrate process-window logic only. Final pressure, temperature, holding time, and cooling strategy must be validated for the material grade, manufacturing route, defect type, heat-treatment condition, and applicable customer standards.
CTA Ladder
Use the technical articles and material reference windows for your internal review, then submit material parameters for a preliminary process-window assessment.
Complete an internal review using standards, the glossary, and technical articles before submitting a full RFQ.
Explore ResourcesValidateShare the material, manufacturing route, defect type, part envelope, and performance targets so the pressure-temperature window and validation plan can be assessed.
View the Validation PathSpecifyOnce the usable zone, throughput, facility utilities, and quality-document requirements are defined, proceed to equipment selection and quotation.
Submit an Engineering RFQ