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prealloyed compacts

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Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003119
EISBN: 978-1-62708-199-3
... iron, is influenced by compaction pressure and the type of lubricant. (For the manufacture of P/M structural parts, a lubricant is used with the prealloyed powder to facilitate compaction of the powder and the ejection of the part from the die.) Lubricants that provide high green strength, such as...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003113
EISBN: 978-1-62708-199-3
... iron powder base to produce materials that generally contain 2″ Cu, including tensile, impact, and fatigue properties. Heat treatment procedures used in developing the properties of the prealloyed powder forged materials are also covered. Finally, the article describes the process steps and cost...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003112
EISBN: 978-1-62708-199-3
... or cast steels. However, these factors themselves are affected by conditions unique to the P/M process, such as type of iron powder, whether alloying additions are prealloyed or admixed, type and amount of lubricant added to the powder, variations in the compacting process, and sintering conditions...
Book Chapter

By Erhard Klar
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003185
EISBN: 978-1-62708-199-3
..., electrochemical, atomizing, oxide reduction, and thermal decomposition processes. It also covers the consolidation of powders by pressing and sintering, as well as by high density methods. Further emphasis is provided on the distinguishing features of powders, their manufacturing processes, compacting processes...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003135
EISBN: 978-1-62708-199-3
... beryllium bronzes. Alloy powders are produced by one of two methods: Preblending copper powders with other elemental powders such as tin, zinc, or nickel Prealloying during powder production Copper and copper alloy powders are generally cold compacted in closed dies with top and bottom...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003988
EISBN: 978-1-62708-185-6
... in other sections of this Handbook. Detailed information on all aspects of powder metallurgy is found in Powder Metal Technologies and Applications , Volume 7 of ASM Handbook. The initial production steps of powder forging (preforming or compaction and sintering) are identical to...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003129
EISBN: 978-1-62708-199-3
... consolidation of elemental or prealloyed powders into near-net shape parts (pressed-and-sintered P/M parts), emerging processes such as mechanical alloying (MA) and rapid solidification (RS) create powders that upon subsequent consolidation provide significant improvements in room- and elevated-temperature...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.9781627081627
EISBN: 978-1-62708-162-7
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005220
EISBN: 978-1-62708-187-0
... which the inertial forces in the liquid that are tending to perturb the surface exceed the surface tension forces that tend to restrain the surface, holding it in a compact form. In practice, the condition works out to be equivalent to a critical velocity, above which the surface can be propelled upward...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004001
EISBN: 978-1-62708-185-6
... based on physical vapor deposition (PVD) techniques such as electron-beam evaporation and magnetron sputtering. Liquid-phase techniques range from conventional ingot metallurgy/ingot casting (e.g., consumable and nonconsumable arc melting) to spray forming and the production of prealloyed powders from...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001306
EISBN: 978-1-62708-170-2
... article in this Section—will be reviewed below. Additional information on these materials can be found in Volumes 1 and 2 of the ASM Handbook . Powder metallurgy (P/M) in its simplest form consists of compressing metal powders in a shaped die to produce green compacts. These are then...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... sand the bench life is shortened. As in resin-bonded sands, the sand is mixed (care should be taken not to overmix the sand, which will produce a crumbly mixture), placed around the pattern, and vibrated to compact it. The sand is then gassed with carbon dioxide gas (hence the name “CO 2 process...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003835
EISBN: 978-1-62708-183-2
... specimens are in test solution until 1% of surface is covered by stain or rust. (b) L, low carbon. (c) LSC, copper and tin are prealloyed into 316L powder. Source: Ref 2 Measurement of weight loss following exposure or immersion in a corrosive media is a standard method used for assessing...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003832
EISBN: 978-1-62708-183-2
... materials such as stainless steels, titanium, or nickel-base alloys, such as nickel-chromium, alloy C278 or alloy 625. These metals and alloys are expected to form a very thin (usually less than 0.1 μm, or 0.004 mils), compact oxide film on the surface, called a passive film that inhibits reaction of the...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005287
EISBN: 978-1-62708-187-0
..., and electric resistance and electric radiation furnaces are all in routine use. The nature of the furnace charge is as varied and important as the choice of furnace type for metal casting operations. The furnace charge may range from prealloyed ingot of high quality to charges made up exclusively from...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.9781627081719
EISBN: 978-1-62708-171-9
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005331
EISBN: 978-1-62708-187-0
... compacted form) that react with molten aluminum to form combinations of TiAl 3 and TiB 2 are also available, although seldom used commercially today. Despite much progress in understanding the fundamentals of grain refinement, no universally accepted theory or mechanism exists to satisfy laboratory...