The document discusses isostatic pressing, detailing cold and hot isostatic presses, their advantages, applications, and process parameters. It highlights the benefits such as uniform strength, improved mechanical properties, and cost reductions in manufacturing. Case studies are presented for various materials, demonstrating the effectiveness of hot isostatic pressing in enhancing product quality and performance.

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2. Introduction Isostatic Press
Cold Isostatic Press (CIP)
Hot Isostatic Press (HIP)
Advantages & applications.
Process considerations & parameters.
Effect of Mechanical properties on cast products on HIP
o On alloy IN738, Titanium , Aluminium alloys, Stainless steels
Case studies on various materials & tools showing possible improvements
in their mechanical property & work ability.
Conclusion
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3. Isostatic pressing applies a uniform, equal force over the entire product, regardless of
shape or size.
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4. Cold isostatic pressing (CIP) Warm isostatic pressing (WIP) Hot isostatic pressing (HIP)
Isostatic pressing is generally used to produce large PM parts to near-net shapes of varied complexity.
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5. compaction pressure provides;
• Density by there by porosity.
• Localized deformation allowing new contacts
to be formed between particles
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11. • Temperature: 200°C–425°C to remove adsorbed moisture
• HIP process is rather slow, and a cycle may take 10 to 15 h,
depends on part size, material, and furnace design.
Advantages:
Uniform strength in
all directions
Uniform density Shape flexibility Component size
Larger parts Enhance alloying
possibilities
Reduced lead times Material and
machining costs
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12. CIP PM:
High green strength Difficult to press materials
HIP PM:
Improved mechanical
properties
Isotropic Properties Predictability
Wear/corrosion
resistance
Diffusion bonding Reduction in welds
Expensive Material Reduction
HOT Isostatic Pressing of casting:
Predictability Mechanical
properties
Improved surface
finish
Extended service life
Opens new markets Salvage Quality cost Manufacturing costs
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16. Material considerations for avoiding such harmful effects as
• Initial melting
• Grain growth
• Degradation of constituent phases such as carbides
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17. Additional process considerations:
• Gas Purity
• Distortion of castings
• Surface defect
• Casting Salvage
• Post-HIP Heat Treatment
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18. For alloy IN738
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19. For alloy IN738
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20. For alloy IN738
Stress rupture properties of IN738 hot isostatically pressed at 1205 C and 103 MPa for 4 hours.
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21. For Titanium
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22. For Titanium
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23. For Aluminium alloys- A356
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24. For Aluminium alloys- A356
HIP conditions: 520 °C and 103 MPa for 2 hours. Stress-controlled test on axially loaded specimen;
maximum stress ratio R=0.1, frequency = 60 Hz, theoretical stress concentration factor Kt=1.0.
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25. For Stainless Steel
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29. Al-7Si-Mg alloy castings were subjected to a HIPing treatment of 100 MPa at 500 C for 6 hours
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36. Thus, HIPed material are safe and holds necessary superior mechanical properties for most of the
small, moderate & bulk applications with high factor of safety.
HIPed cast or formed materials possess superior strength & toughness hence it is the widely
scoped metallurgical casting process with aid of high pressure & temperature.
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