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hydrostatic hot extrusion

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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
...Abstract Abstract This article discusses two basic forms of extrusion: cold and hot. It provides information on three types of extrusion processes, namely, direct extrusion, reverse extrusion, and hydrostatic extrusion. The article also discusses the mechanics, analysis, tooling and die design...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... extruded shapes extrusion dies extrusion speed hot extrusion hydrostatic hot extrusion indirect extrusion lubricant lubricated hot extrusion nonlubricated hot extrusion presses HOT EXTRUSION is a process in which wrought parts are formed by forcing a heated billet through a shaped die opening...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004007
EISBN: 978-1-62708-185-6
... the hydrostatic extrusion of structural alloys, composites, brittle materials, and intermetallics or intermetallic compounds, with examples. It concludes with a discussion on the attempts made to extend the hydrostatic extrusion to higher temperatures. brittle materials composites hot hydrostatic...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004013
EISBN: 978-1-62708-185-6
... in the articles “Cold Extrusion,” “Conventional Hot Extrusion,” and “Hydrostatic Extrusion of Metals and Alloys” in this Volume. Fig. 1 Diagram of coextrusion/codrawing. Based on Ref 4 Recently, The Welding Institute (TWI) developed a new process for coextrusion based on friction extrusion...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002485
EISBN: 978-1-62708-194-8
... of bulk-deformation processes such as hot forging, hot extrusion, cold forging, cold extrusion, wire and strip drawing, and rolling. The remaining deformation processes are defined by an initially large surface-area-to-volume ratio such that the volume of material in the deformation zone at any given time...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009006
EISBN: 978-1-62708-185-6
... to forecast workability. Compression Testing Compression testing (See the articles “Cold Upset Testing” and “Hot-Compress Testing” in this volume.) can also be useful in projecting workability in drawing and extrusion. There are some major limitations, however. First, the tensile hydrostatic stress...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003258
EISBN: 978-1-62708-176-4
... subjected to high levels of triaxial (hydrostatic) tensile stresses. Center-burst (chevron) cracking of solid rods in drawing and extrusion, plane-strain drawing of sheet or plate, and tube drawing or spinning are due to the high hydrostatic tensile stress component at the centerline of the workpiece during...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009004
EISBN: 978-1-62708-185-6
... in the material during processing. In the spectrum of processes (extrusion, rolling, forging, and wire drawing), the average hydrostatic stress becomes increasingly tensile, and the strain to fracture progressively decreases. Within each of these processes, however, the stress and strain states can be considered...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006534
EISBN: 978-1-62708-207-5
... imparted by hydrostatic extrusion can enable reductions at temperatures well below those possible with conventional hot extrusion. Hydrostatic extrusion is more commonly applied for less-ductile materials, but applications for aluminum have been a subject of research over the years. This article focuses...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001110
EISBN: 978-1-62708-162-7
... alloy matrix. The 19 filaments in the center of the array are high-purity (99.999%) aluminum. This composite was assembled using kit technology and was hydrostatically extruded at ambient temperature in a conventional extrusion press converted for dual hydrostatic/conventional use. Courtesy of Supercon...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001105
EISBN: 978-1-62708-162-7
... Simple or complex shapes … Medium Low to high Hot extrusion Depending on press capacity Long pieces with uniform cross sections Alloy steel dies High Low Infiltration Depending on equipment Intricate shapes feasible Graphite and ceramic molds Low High Comparison of transverse...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006085
EISBN: 978-1-62708-175-7
... higher working temperatures opened the way for the hot extrusion of copper alloys and laid the foundation for modern extrusion. Pearson and Parkins ( Ref 1 ) and Lange and Stenger ( Ref 2 ) have written comprehensively on the history, development, application, and mechanics of extrusion...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
... at the center continue to rise and cross the fracture line, coinciding with the formation of the central burst. The calculated hydrostatic tension at fracture was 0.3 yield stress ( Y ). This approach could be used for predicting central burst in drawing and extrusion to provide a material-dependent criterion...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006488
EISBN: 978-1-62708-207-5
... and 400 °C (750 °F). Source: Ref 24 Much less work has been conducted on cold forming/forging, due to the more limited ductility of such materials, although hydrostatic extrusion of these materials is possible at room temperature ( Ref 25 ). In all cases, damage in the form of reinforcement...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004002
EISBN: 978-1-62708-185-6
... of such materials, although hydrostatic extrusion of these materials is possible at room temperature ( Ref 37 , 38 ). In all cases, damage in the form of reinforcement cracking and/or reinforcement/matrix interface voiding may occur, even in compression. There is often a change in failure mechanism with increasing...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... of stress. Experience shows that the greater the compressive mean stress the better the workability of a material. For example, most materials can be deformed more easily in an extrusion press and even more so with hydrostatic extrusion ( Ref 23 ). The mean or hydrostatic component of the stress state...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... or reverse extrusion. Lack of flash at the parting line decreases stress-corrosion cracking in forging alloys susceptible to this type of failure. Multidirectional hot working, characteristic of this process, decreases adverse directional effects on mechanical properties. Die Design and Materials...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
.... Experience shows that the greater the compressive mean stress, the better the workability of a material. For example, it is known that most materials can be deformed more easily in an extrusion press and even more so with hydrostatic extrusion ( Ref 10 ). The mean or hydrostatic component of the stress state...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
... shows schematic diagrams for wire and bar drawing and tube drawing. The drawing process is typically performed at room temperature, but hot and warm drawing are also carried out. Commonly drawn materials include steels, stainless steels, aluminum and its alloys, and copper and its alloys. Less...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.9781627081856
EISBN: 978-1-62708-185-6