Hot Isostatic Pressing of Type 316L/304K and Monel 400 Powders for Pressure Boundary Components

2006 ◽  
Author(s):  
W. Barry Burdett
Keyword(s):  
Structural Integrity ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Nuclear Industry ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Fine Grain ◽  
Monel 400 ◽  
Offshore Oil Industry

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it becomes possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties and reduced cost. NNS items from powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which also provide protection against forging route obsolescence. Setup costs are lower and batch sizes smaller. HIPped powder microstructures are isotropic and equiaxed, with uniformly fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Inclusion contents are lower and of more benign geometry, easing fracture assessment. Use of the technology has grown, particularly in the offshore oil industry where it is already established in high integrity applications, particularly in place of welded joints. Take-up in the more conservative nuclear industry has been slow. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components. In a broad programme of testing, it was established that HIPped powder 316L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance. Work has now been extended to Monel 400 nickel-based alloys and Type 304L. The manufacturing technology has been tailored to produce pressure-retaining components in these alloys for prototype testing.

Hot Isostatic Pressing of Type 316L Powder for a Pressure Retaining Component

2005 ◽  
Author(s):  
W. Barry Burdett ◽  
Chris T. Watson
Keyword(s):  
Structural Integrity ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Nuclear Industry ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Fine Grain ◽  
Safety Case ◽  
Offshore Oil Industry

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it becomes possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. NNS items produced from powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which also provide protection against forging route obsolescence. Setup costs are lower and batch sizes smaller. HIPped powder microstructures are isotropic and equi-axed, with uniformly fine grain sizes not normally achieved in heavy section components, which makes ultrasonic NDE examination much easier. Inclusion contents are lower and of more benign geometry, which assists fracture assessment. Use of the technology has grown, particularly in the offshore oil industry where it is already established in high integrity applications, particularly in place of welded joints. Take-up in the more conservative nuclear industry has been slow. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components. In a broad program of testing, Rolls-Royce has established that HIPped powder 316L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance than the forged counterpart. The Safety Case for a thin-walled pressure retaining component has been accepted and implemented.

Hot Isostatic Pressing of Hardfacing and Stainless Steel Powders for PWR Components: Materials and Manufacturing Benefits

2012 ◽  
Author(s):  
W. Barry Burdett
Keyword(s):  
Structural Integrity ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Nuclear Industry ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Fine Grain ◽  
High Integrity ◽  
Safety Cases

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it is possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. NNS items from powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which provide protection against forging route obsolescence. Setup costs are lower and batch sizes smaller, particularly well suited to small numbers of high integrity components. HIPped powder microstructures are isotropic and equiaxed, with uniformly fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Improved features to facilitate NDE are readily incorporated into the HIP assembly. Inclusion contents are lower and of more benign geometry, easing fracture assessment. Use of the technology has grown, particularly in the off-shore oil industry where it is already established in high integrity applications, particularly in place of welded joints. Take-up in the more conservative nuclear industry has been slow. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components. This paper presents a materials perspective on the way in which Rolls-Royce has gained experience with HIPped powders since the 1990s, initially with hardfacing materials to minimise welding defects and provide a robust manufacturing route. Building on this database, we have now established that HIPped powder 316L/304L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance to their forged or cast counterparts. This data is now part of a submission to ASME for inclusion in the Pressure Vessel Code. Rolls-Royce now has a robust methodology in place to develop safety cases and is extending the number of applications in pressure boundary components on current and future classes of equipment. A strength-in-depth argument has been endorsed by external approval organisations and is supporting current submarine build programmes. Other applications in the growing civil nuclear market are now under consideration.

Hot Isostatic Pressing of Austenitic Stainless Steel Powders for Pressure Retaining Applications

2004 ◽  
Author(s):  
W. Barry Burdett ◽  
Paul Hurrell ◽  
Alan Gilleland
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Structural Integrity ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Nuclear Industry ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Wide Range

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When the technique is applied to fine metal powders, it becomes possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties and reduced cost. Manufacture of NNS items from powder delivers cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which also provide protection against forging route obsolescence. Setup costs are lower and smaller batch sizes possible. HIPped powder microstructures are isotropic and equi-axed, with uniformly fine grain sizes not normally achieved in heavy section components. In austenitic stainless steel materials, this provides significant improvements in ultrasonic NDE (Non-Destructive Examination) in thick sections. Use of the technology has grown, particularly in the off-shore oil industry where it is already established in high integrity applications, but take-up in the more conservative nuclear industry has been slow. In a broad programme of testing, Rolls-Royce has established that HIPped powder 316L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion properties across a wide range of test environments. A methodology for developing robust safety justifications for use has been developed. Manufacture of pressure seal components is now in progress and the economics of other applications such as pump bowls are being considered. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components.

The Implementation of Hot Isostatically Pressed Powder Type 316L/304L Pressure Boundary Components in a PWR Plant

2009 ◽  
Author(s):  
W. Barry Burdett ◽  
Ian D. Hookham
Keyword(s):  
Structural Integrity ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Nuclear Industry ◽  
Metal Powders ◽  
Fine Grain ◽  
Safety Case ◽  
Asme Code ◽  
Powder Type

Hot Isostatic Pressing (HIP) has been used since the 1980s to consolidate porosity in cast metal shapes and improve mechanical properties in conventional forgings and wrought components. The availability of high quality metal powders has made it possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. Powder HIP manufacturing reduces initial material usage and subsequent machining costs. Metal powder production and HIP processing are automated methods, which also provide protection against forging route obsolescence. Setup costs are lower and batch sizes smaller. HIPped powder microstructures are isotropic and equiaxed, with fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Inclusion contents are lower and of more benign geometry, easing fracture and safety case development. Although widely used in the off-shore oil industry in high integrity applications, particularly to reduce welded connections, in the nuclear industry interest has been limited. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components. In an extensive programme of testing, it was established that HIPped powder 316L and 304L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance. HIPped powder items are now in service as pressure retaining components in PWR plant. Effort is now directed at widening the range of components for which the HIP process is appropriate focusing on reducing welds in the plant construction sequence. This is particularly relevant to pipework manufacture and assembly. The benefits of facilitating an ASME Code Case for Powder HIP are also being considered.

Type 304L and 316L HIP Powder Processing for PWR Components: Design and Manufacturing Benefits and Safety Case Progress

2010 ◽  
Author(s):  
W. Barry Burdett
Keyword(s):  
Structural Integrity ◽  
Powder Processing ◽  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Implementation Process ◽  
Nuclear Industry ◽  
Metal Powders ◽  
High Integrity ◽  
Safety Cases

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it is possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. NNS items manufactured from powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which provide protection against forging route obsolescence. Setup costs are lower and batch sizes smaller, which makes the process particularly well suited to small numbers of high integrity components. HIPped powder microstructures are isotropic and equiaxed, with uniformly fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Improved features to facilitate NDE are readily incorporated into the HIP assembly. Inclusion contents are lower and of more benign geometry, easing fracture assessment. Use of the technology has grown, particularly in the offshore oil industry where it is already established in high integrity applications, particularly in place of welded joints. Take-up in the more conservative nuclear industry has been slow. The quality of HIPped powder items can provide through life cost savings since there is greater assurance of structural integrity compared to welded or wrought components. In a broad programme of testing, Rolls-Royce has established that HIPped powder 316L/304L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance than conventional forgings. Rolls-Royce now has a robust methodology in place to develop safety cases and is extending the number of applications in pressure boundary components on current and future classes of equipment. A strength-in-depth argument has been endorsed by external approval organisations and is supporting current submarine build programmes. Other applications in the growing civil nuclear market are now under consideration. A plan for developing an ASME Code Case for Powder HIP is being considered. This paper presents an update on the implementation process.

Hot Isostatic Pressing of Inconel 600 and 690 Powders for Pressure Retaining Components

2011 ◽  
Author(s):  
Timothy C. Jelfs ◽  
W. Barry Burdett
Keyword(s):  
Complex Geometry ◽  
Hot Isostatic Pressing ◽  
Cost Savings ◽  
Good Control ◽  
Processing Parameters ◽  
Metal Powders ◽  
Isostatic Pressing ◽  
Inconel 600 ◽  
Inconel Alloys ◽  
Inconel 690

Hot Isostatic Pressing (HIP) has been used for many years to consolidate porosity in cast metal shapes to improve mechanical properties. When applied to fine metal powders, it is possible to produce Near Net Shape (NNS) items and more complex geometry components that are fully dense and offer an attractive set of properties at reduced cost. NNS items produced from HIPed powder deliver cost savings by reducing initial material usage and subsequent machining costs. Powder production and HIP processing are automated methods, which provide protection against forging route obsolescence. Setup costs are lower and batch sizes are smaller, which makes HIPping particularly well suited to small numbers of high integrity components. HIPed powder microstructures are isotropic and equiaxed, with uniformly fine grain sizes not normally achieved in heavy section components, which facilitates ultrasonic NDE examination. Improved features to facilitate NDE are readily incorporated into the HIP assembly. Inclusion contents are lower and of more benign geometry, easing fracture assessment. In a broad program of testing, Rolls-Royce has established (1) that HIPed powder 316L/304L components, in items up to several tons in weight, have equivalent or slightly better strength, toughness and corrosion resistance than the wrought equivalents. Rolls-Royce are extending their activities to HIPing of Inconel alloys. The first phase has been to HIP test samples of Inconel 600 and Inconel 690 alloys. Initial testing has produced promising results in line with expectations of wrought material. There has also been the opportunity to vary the HIPing cycle to assess the effect of processing parameters on the final product. An ability to HIP Inconel components is thought to be of benefit in new plant construction, where material is often not readily available in required thick section. The adaptability and good control of the HIP technique also shows promise as a manufacturing route for future high temperature materials which will be required in Generation 4 civil builds.

Development Modes of Prior Free Sintering to Form a High-Density Fine Grain Ceramics after HIP

2014 ◽  
Vol 698 ◽  
pp. 457-460 ◽  
Author(s):  
Sergey Veselov ◽  
Natalya Belousova ◽  
Roman Timarevskiy ◽  
Nina Cherkasova
Keyword(s):  
Physical Properties ◽  
Structural Investigation ◽  
Hot Isostatic Pressing ◽  
Cold Isostatic Pressing ◽  
High Density ◽  
Isostatic Pressing ◽  
Fine Grain ◽  
Time Parameters ◽  
Temperature Time

In this paper the two methods of pre-operation green samples to hot isostatic pressing (HIP) were investigated. The influence the method of formation (uniaxial and cold isostatic pressing) and the temperature-time parameters on property of samples was analyzed. Structural investigation was carried out and physical properties of samples were defined. The recommendations for pre-operation and uses of sintering modes samples for HIP were given.

Sign in / Sign up

Export Citation Format

Share Document