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wire drawing

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Image
Published: 01 December 1992
Fig. 2 SEM fractographs of the surface of spring. (a) 101×. (b) Wire drawing defect at the origin. 252×. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... by fatigue. The springs contained drawing defects that served as the fatigue crack initiation sites. It was recommended that the wire drawing process be investigated for various levels of steel cleanliness to predict the incidence of drawing defects at the wire surface. Stress analysis to determine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048128
EISBN: 978-1-62708-225-9
... by careful examination. A hard material (mill scale) was assumed to have been impressed during drawing of the wire and was broken out during peening, leaving the depressions with sharp-bottomed corners. Spring was concluded to have failed due to a surface defect. Scale (corrosion) Wire drawing Spring...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001646
EISBN: 978-1-62708-219-8
... by cold drawing high-carbon wire rod in multi-pass drawing machines. In addition to high tensile strength, roping wires must also possess good surface characteristics and adequate torsion and bend properties to withstand the rigors of rope manufacture and service exposure. The overall strength of a wire...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001778
EISBN: 978-1-62708-241-9
...) Introduction Steel wires, produced from controlled cooled or patented wire rods by single or multipass cold drawing, have many engineering applications including the manufacture of springs, needles, wire ropes, screws, and so forth. In rope manufacturing, steel wires are laid helically in different layers...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048131
EISBN: 978-1-62708-225-9
... in the load test due to the split wire. The reason for the condition was interpreted to be overdrawing which resulted in intense internal strains, high circumferential surface tension, and decreased ductility. Ductility Strain Surface tension Wire drawing Spring steel Metalworking-related failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001258
EISBN: 978-1-62708-235-8
... Abstract A drawing plant which processed steel wire of designation 105 Cr 2 for ball bearings had losses due to crack formation and wire breakage during drawing. To establish the reason for the breakage, seven fractures were submitted for investigation with contiguous wire segments on both...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001186
EISBN: 978-1-62708-234-1
... at the fracture itself it was completely spheroidized. Therefore the wire was locally annealed at this point. It was likely that the wire cracked at this point during the last drawing and then broke during twisting due to its lower strength in the weakened cross section after prior deformation. Annealing...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001124
EISBN: 978-1-62708-214-3
... assisted fatigue crack initiation/propagation. The failure was attributed to the departure of conductor quality from the requirements of ASTM B 398 and B 399, which specify that “no joints shall be made during final drawing or in the finished wire” and that the joints should not be closer than 15 m (50 ft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090433
EISBN: 978-1-62708-218-1
... Abstract A production lot of plastic wire clips was failing after limited service. The failures were characterized by excessive relaxation of the clips, such that the corresponding wires were no longer adequately secured in the parts. No catastrophic failures had been encountered. Parts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001443
EISBN: 978-1-62708-235-8
... motor. The mode of failure and the changes in the microstructure showed that fracture was due to a defective resistance butt-weld which had been made when the wire was in process of drawing. A further example of a conductor failure occurred in a 12 SWG copper connection between the rotor contactor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0090932
EISBN: 978-1-62708-235-8
... to ductile overload. The forming stresses were sufficient to initiate surface ruptures, suggestive of having exceeded the forming limit. Recommendations included examining the forming process, including lubrication and workpiece fixturing. Cold drawing Cracks Wire 303 UNS S30300 Ductile fracture...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
.... The origin of the fracture was at a subsurface void that had a triangular-shaped cross section ( Fig. 8 ). The void was associated with a wire-drawing defect, probably produced by a scratch or indentation in the die. Fig. 6 SEM image showing the fatigue crack on the right and overload area on the left...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001527
EISBN: 978-1-62708-224-2
... mechanical properties alone, with composition dictated by the ability of the finished product to satisfy the requisite strength level after wire drawing and rope manufacture. Wire Grades Labeled grades of wires are of historical significance, but are somewhat vague. The following grades have been...
Image
Published: 01 December 1992
Fig. 9 Optical photograph of a transverse cross section through the wire of spring 1, showing the cross section of the drawing defect (void) that initiated the fatigue fracture. 1260×. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001219
EISBN: 978-1-62708-219-8
... even though this could not be proved anymore after pickling and drawing. Experience shows that defects of this kind and depth have only a barely noticeable effect on strength and a very limited effect on pliability of the wire as could be confirmed by tests. Therefore, it is improbable that they were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001715
EISBN: 978-1-62708-219-8
... are elongated (egg-shaped) along the longitudinal axis of the wire, due to the cold work imposed during the wire drawing operations. The ferrite is aligned in the <110> direction, 7 and cleavage occurs on {100} planes in ferrite. 8 Inclusions The wire samples evaluated from the various siphons...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001397
EISBN: 978-1-62708-235-8
... necessary to cause cracking were doubtless of the residual type, inherent in wire of this quality, which is work-hardened by cold-drawing in order to attain the necessary tensile strength. The origin of the chlorides was not so evident it is remotely possible that the rotor may have been inadvertently...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... in molten lead baths to produce the preferred fine pearlite microstructure. Fully pearlite microstructure is highly deformable under wire-drawing conditions [ 1 ]. There are other factors affecting wire rope properties including, sulfur and phosphor contents, nonmetallic inclusions, and the appearance...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001800
EISBN: 978-1-62708-241-9
... to the electroplating operation); however, embrittlement of prior austenite grain boundaries should not be possible with cold-drawn music wire. In music wire the ferrite grains and pearlite colonies are severely deformed, and any prior austenite grain boundaries are destroyed during the drawing operation. Indeed...