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extrusion presses

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0045903
EISBN: 978-1-62708-223-5
...Abstract Abstract A 230 mm (9 in.) thick casing, fabricated from ASTM 235-55 low-carbon steel, of a 450 Mg (500 ton) extrusion press failed after 27 years of service. Initial visual examination revealed an area that exhibited multiple origins and classic beach marks radiating out approximately...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001287
EISBN: 978-1-62708-215-0
...Abstract Abstract A recurring piston shaft failure problem on the billet-loading tray of an extrusion press was investigated. Two shafts fractured within a period of 10 days. The shaft was machined from normalized EN3 (AISI C1022) steel stock without further treatment. Visual, microstructural...
Image
Published: 01 June 2019
Fig. 1 Schematic of extrusion press casing. Cross-sectional view More
Image
Published: 01 June 2019
Fig. 3 EPMA analysis of inclusion stringers in failed extrusion press. (a) SEM micrograph of metallographic section near bleed hole. Note large inclusions. 490x. (b) EDX dot map of manganese. (c) EDX dot mop of sulfur More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... . The extrusions were performed on a fully computerized 3500-ton SMS-Hasenclever press. Cylindrical billets of Al-6063 are preheated in stage wise furnaces before extrusion. Dies made of heat-treated and surface hardened H13 steel are also preheated before placed into extrusion chamber (container). The container...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... effect. However, at conditions of either low (>4) or high (<10) pH, the rate of hydrolysis may become perceptible and result in molecular weight reduction and mechanical property diminution. These polymer types can also degrade during processing (i.e., extrusion or injection molding...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
..., extrusion, straightening, sizing, etc.). These metalworking operations have a two-fold purpose. First, they are obviously designed to produce parts with the desired configuration. Secondly, metalworking can develop a final shape with internal soundness and improved mechanical properties by: Improved...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
... by the intrusion-extrusion mechanism from persistent slip bands are referred to as Stage I cracks, which form on the active slip plane that lies at an angle to the stress axis [ 5 – 7 ]. Figure 5 shows that the depth of the fatigue crack at Stage I is about 50 μm. In Stage I, the crack propagated slowly...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... metalworking (where mill forms such as bar, plate, tube, sheet, and wire are worked from ingot or other cast forms) or secondary metalworking (where mill products are further formed into finished products by hot forging, cold forging, drawing, extrusion, straightening, sizing, etc.). These metalworking...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... vulnerable point in a dynamically stressed area—typically a stress raiser, which may be mechanical, metallurgical, or sometimes a combination of the two. Mechanical stress raisers include such features as small fillets, sharp corners, grooves, splines, keyways, nicks, and press or shrink fits. Shafts often...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... been attributed to a number of mechanisms, including cutting ( Ref 45 , 50 , 51 , 52 , 53 , 54 ), fragmentation ( Ref 55 ), elastic and elastic-plastic fracture ( Ref 56 , 57 , 58 ), extrusion ( Ref 59 , 60 ), fatigue ( Ref 61 , 62 ), delamination ( Ref 63 , 64 ), deformation localization...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... of inclination to the vertical was 15°. Investigation Visual examination disclosed that the side-rail extrusions, which had the I-beam shape shown in Fig. 3(a) , had failed by plastic buckling, with only slight surface cracking in the most severely deformed areas. There were no visible defects...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
...°. Investigation Visual examination disclosed that the side-rail extrusions, which had the I-beam shape shown in Fig. 3(a) , had failed by plastic buckling, with only slight surface cracking in the most severely deformed areas. There were no visible defects in materials or workmanship, and all dimensions...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... required or specified (i.e., a separately cast tensile bar used to certify a casting, or the longitudinal tensile properties to certify a complex aluminum extrusion), but the specific properties required for the application may rely on the strength, toughness, or stress-corrosion cracking resistance...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
...). Other coarse-grained regions were located 90° circumferentially from the cracked areas. It was concluded that the pipes had been manufactured by extrusion through a bridged die, and that the extreme grain growth had resulted from the heat and strain of welding in the die. Coarse grains mean less...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
... of the coarse-grained zone is due to the manufacturing method of the manifold (hot extrusion). Replica Technique The orientation of the oxidation cracks is in axial direction (thus similar to creep cracks). Using the replica technique in situ, the cracks were thought to be creep cracks. This confirms...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
..., failures start at the most vulnerable point in a dynamically stressed area—typically a stress raiser, which may be mechanical, metallurgical, or sometimes a combination of the two. Mechanical stress raisers include such features as small fillets, sharp corners, grooves, splines, keyways, nicks, and press...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... clearance > group normal For temperature applications where thermal dilatations or differential thermal dilatation may occur, or to be used with strong interference press fits Group 4 Radial clearance > group 3 Group 5 Radial clearance > group 4 Note that the nominal tolerance...