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die compaction

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Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006083
EISBN: 978-1-62708-175-7
...Abstract Abstract Warm compaction uses both powder heating and die heating to effect higher component densities, whereas warm die compaction uses only die heating to achieve higher density. This article explains the influences of green and sintered properties and pore-free density during...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006033
EISBN: 978-1-62708-175-7
...Complete set of material properties for die compaction of an iron-base powder Table 1 Complete set of material properties for die compaction of an iron-base powder Densities Pycnometer density 7.8 g/cm 3 Fractional tap density 0.45 Yield function (Shima-Oyane) α 6.2 γ 1.03...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006074
EISBN: 978-1-62708-175-7
... of cold isostatically pressed parts Fig. 3 Small CIP system with quick-opening top closure. Courtesy of EPS Inc. Fig. 5 Density as a function of pressure for cold isostatically pressed and die-compacted parts Abstract Abstract This article describes the unique aspects of cold...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006097
EISBN: 978-1-62708-175-7
... Abstract Abstract This article provides an overview of the compaction of metal powder in a rigid die and reviews the compaction characteristics of stainless steel powders, including green density, compressibility, green strength, apparent density, flow rate, and sintered density. It describes...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002486
EISBN: 978-1-62708-194-8
... conventional die compaction conventional press method conventional sinter method density metal injection molding powder forging powder metallurgy THE POWDER METALLURGY (P/M) process is a near-net or net-shape manufacturing process that combines the features of shape-making technology for powder...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005502
EISBN: 978-1-62708-197-9
... relevant to sintering; for example, friction in die compaction changes during the split-second pressure stroke, because lubricant (polymer) particles deform and undergo viscous flow to the die wall, effectively changing friction constantly during compaction. Thus, the simulations are approximations using...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006034
EISBN: 978-1-62708-175-7
...History of development in PM presses Table 1 History of development in PM presses Years Compacting press 1955–1959 Cam press, HP 1960–1964 Toggle press, MP 1965–1969 Large size HP (500 +), large size MP (500 +) 1970–1974 Multistepped MP, double die compacting press...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005531
EISBN: 978-1-62708-197-9
... be applied to product design, tool design, PIM simulation, and continuum approaches to sintering. Nonlinear continuum models involve FEA of nonlinear materials, which are used for simulations of powder die compaction, cold and hot isostatic compaction, and powder forging. In all process modeling...
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
.... and Neupaver A. , Ed., Metal Powder Industries Federation , 1994 , p 117 – 133 11. James W.B. and Narasimhan K.S. , Warm Compaction and Warm-Die Compaction of Ferrous PM Materials , presented at PM Association of India Conference , Pune , 2013 12. German R.M. , Powder...
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
... and lubricant is not likely to generate fine metal dust. Several molding-grade powders are available both in elemental and alloyed form. Metal powders are usually admixed with a lubricant to enable ejection of the green part once it has been die-compacted. Ethylene bis(stearamide) (EBS) wax is the preferred...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003113
EISBN: 978-1-62708-199-3
... is prepared and injected into a mold. The MIM powders are typically spherical in shape and much finer in particle size than those used for conventional cold-die compaction (MIM powder, 10 to 20 μm; conventional die-compaction powders, 50 to 150 μm). The binders are formulated specially to provide the proper...
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
...: Ref 7 Application of powder processing methods Table 4 Application of powder processing methods Conventional die compaction Metal injection molding Hot isostatic pressing Powder forging Material Steel, stainless steel, brass, copper Steel, stainless steel Superalloys...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006445
EISBN: 978-1-62708-190-0
... in the green compact that burnt out during sintering. Unetched Fig. 5 Defects in green PM compacts. (a) Artificial defect caused by the inclusion of a thin wax sliver in the die fill. Unetched. (b) Artificial defect produced by partially filling a die, compacting the powder at 345 MPa (50 ksi...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006080
EISBN: 978-1-62708-175-7
... involves the deformation of a powder preform in which considerable lateral flow occurs ( Fig. 1a ). Forging is carried out on high-speed presses that are automated for mass production. Hot pressing, on the other hand, involves compression of loose powder or a powder compact fitted tightly in the die cavity...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006042
EISBN: 978-1-62708-175-7
...-spherical morphology of the powder particles made conventional die compaction difficult, and HIP was one of the few processes by which the powders could be converted into a monolithic shape ( Ref 15 , 16 ). Currently, the production of tool steels and iron-, nickel-, and cobalt-base superalloys via the HIP...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006127
EISBN: 978-1-62708-175-7
.... Courtesy of Bleistahl Fig. 52 Microstructure of a copper infiltrated valve seat insert die compacted from a mixture of water atomized HSS, solid state lubricant and intermetallic phase powders. Courtesy of Bleistahl Fig. 53 Weilbull plot of the three point bending strength at 65 HRC...
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
...-strength materials ( Ref 16 ). Safe Handling of Aluminum Powders Several compaction-grade powders are available in both elemental and alloyed form. Metal powders are usually admixed with a lubricant to enable ejection of the green part once it has been die compacted. Ethylene bis-stearamide wax...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006032
EISBN: 978-1-62708-175-7
... on the green properties of ferrous compacts Table 2 Effect of processing on the green properties of ferrous compacts Base material Processing technique Compaction pressure Green density, g/cm 3 Green strength Peak die ejection force MPa tsi MPa psi MPa tsi Ancorsteel 85HP...
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
... °C (1382 °F) in hydrogen 4 h Wax-polymer Supercritical Heat in freon vapor at 10 °C/min (18 °F/min) to 600 °C (1112 °F) under 10 MPa (1.5 ksi) pressure 6 h Wax-polyethylene Vacuum extraction Slow heat while passing low-pressure gas over compacts; heat to sintering temperature 36 h...
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
... Cold Isostatic Pressing Green Machining Injection Molding Process Defects Process Process Binder Process Pressing involves compaction of powder under pressure by constraining it between die walls and rams to increase green density to a required level. In uniaxial pressing...