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postsinter handling

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Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006119
EISBN: 978-1-62708-175-7
... Abstract Powder metallurgy (PM) stainless steels, as with conventional PM steels, are often used in the as-sintered condition. In addition to cost considerations, minimization of postsinter handling and secondary operations is also preferred because it reduces the potential for contamination...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006125
EISBN: 978-1-62708-175-7
... by automated or semiautomated handling equipment. Cold rolling may be performed free or in tension. Pack rolling is sometimes used to make thinner-gauge material than equipment can otherwise produce. In-line heating is sometimes used during cold rolling to ensure the material temperature does not fall below...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006132
EISBN: 978-1-62708-175-7
..., there is a fine coating of aluminum oxide (alumina) on the particle surface. Further details and discussion of additional aluminum powder production methods are described in the article “Production of Aluminum and Aluminum Alloy Powder” in this Volume. The powder form of aluminum should be handled with care...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002374
EISBN: 978-1-62708-193-1
... and fracture resistance of P/M materials. It reviews the methods employed to improve fatigue and fracture resistance, including carbonitriding, surface strengthening and sealing treatments, shot-peening, case hardening, repressing and resintering, coining, sizing, and postsintering heat treatments. Safety...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006053
EISBN: 978-1-62708-175-7
... that are sintered to full density, such that no subsequent shaping is required, while maintaining required dimensional tolerances and shape. To keep postsinter shaping to a minimum requires an understanding of green density, shrinkage, and distortion. The green shaping process must take into account powder flow...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006497
EISBN: 978-1-62708-207-5
... the compaction process. This leads to sufficient strength in the green compact so that it can be readily handled by good PM manufacturing practices. In contrast, powders produced by inert gas atomization are spherical in nature, which implies that there is very little, if any, green strength. The specific...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003166
EISBN: 978-1-62708-199-3
... in uranium work areas. Finally, depleted uranium is mildly radioactive. This low level of radioactivity is generally considered to constitute less of a hazard than chemical toxicity. Working in the vicinity of depleted uranium and normal handling of this material do not result in exposures that exceed...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001083
EISBN: 978-1-62708-162-7
... porosity ( Fig. 1a ) will degrade both fatigue and fracture properties. A substantial effort has been made to entirely eliminate the porosity so that BE P/M parts can be used for fatigue-critical aerospace applications. Postsintering HIP densification can lead to 99.8% density and improved properties ( Ref...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006141
EISBN: 978-1-62708-175-7
... developed some handling strength. Consolidation is the final step (other than any of the MIM postconsolidation steps that are sometimes utilized) in a MIM process. During this step, the molded, debound, and presintered parts are exposed to elevated temperatures typically greater than 75% of the melting...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006022
EISBN: 978-1-62708-175-7
... is a recognized metal forming technology that competes directly with other metalworking practices such as casting, forging, stamping (fine blanking), and screw machining. The industry comprises powder suppliers and parts makers, plus the companies that supply the mixing equipment, powder handling equipment...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006571
EISBN: 978-1-62708-290-7
... of each layer or after the entire part is fabricated. The resulting parts usually exhibit sufficient mechanical strength for handling but insufficient for use in many load-bearing applications and therefore are termed “green parts.” In addition, in some variants of BJAM, as-fabricated green parts require...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001104
EISBN: 978-1-62708-162-7
... powders Compacting or powder consolidation Sintering Postsinter forming The sintered product can be directly used or can be ground, polished, and coated to suit a given application. Preparation of Tungsten Carbide Powder There are two methods by which tungsten carbide powders...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006101
EISBN: 978-1-62708-175-7
... generally minimizes the need for postsintering (secondary) machining operations. Ferrous PM offers a wide range of engineered materials for use in structural applications and satisfies close dimensional tolerance requirements for parts with complex geometries. When a material is selected for an intended...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006579
EISBN: 978-1-62708-290-7
... the composition and performance criteria for copper alloys that have been reported for AM and discusses key differences in process-structure-property relationships compared to conventionally processed material. The article also provides information on feedstock considerations for copper powder handling...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006883
EISBN: 978-1-62708-392-8
... deposition. This article discusses the processes involved in polymer powder 3D printing using laser fusion/ sintering and fusing agents and energy, as well as the thermally fused PBF. It provides information on polymer powder parameters and modeling, the powder-handling system, powder characterization...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006057
EISBN: 978-1-62708-175-7
... film. Carbides and nitrides also lower structure-sensitive magnetic properties and corrosion resistance and decrease ductility. Postsinter processing of stainless PM parts affects magnetic properties ( Table 10 ) ( Ref 10 ). Properties of wrought stainless steels listed in Table 11 ( Ref 11 ) can...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006412
EISBN: 978-1-62708-192-4
... specimens. Compared with most other bearing materials, tin alloys have low resistance to fatigue, but their strength is sufficient to warrant their use under low-load conditions. These alloys are commercially easy to bond and handle, and they have excellent antiseizure qualities. Their excellent...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006095
EISBN: 978-1-62708-175-7
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.9781627082907
EISBN: 978-1-62708-290-7
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003062
EISBN: 978-1-62708-200-6
... on the substrate after printing and drying, with enough mechanical strength for handling. During high-temperature firing, resins must burn off completely. With the advent of non-noble metal systems such as copper conductors, and base metal resistors and dielectrics, it is even more difficult to select a suitable...