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Steel bearing

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047939
EISBN: 978-1-62708-225-9
... Abstract Rough operation of the roller bearing mounted in an electric motor/gearbox assembly was observed. The bearing components made of low-alloy steel (4620 or 8620) and the cup, cone and rollers were carburized, hardened and tempered. The contact surfaces of these components (cup, cone...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001513
EISBN: 978-1-62708-232-7
... Abstract While in the stationary mode, capillary action at the contact line between roller and race in a steel rolling mill taper bearing caused a concentration of lubricant and moisture to occur. This lead to lines of corrosion pits at roller intervals. During subsequent operation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001645
EISBN: 978-1-62708-232-7
... Abstract An extensive metallurgical investigation was carried out on samples of a failed roller bearing from the support and tilting system of a basic oxygen furnace converter used in the steel melting shop of an integrated steel plant. The converter bearing was fabricated from low-carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046371
EISBN: 978-1-62708-234-1
... shown in Fig. 1 . The bearing had not seized, and there was no evidence of heat discoloration in the galled areas. Fig. 1 Evidence of galling, or adhesive wear, on the inner surface of a carburized 4720 steel inner cone of a roller bearing. Galling was confirmed by the use of electron probe x...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0091893
EISBN: 978-1-62708-218-1
... Abstract An automotive front-wheel outer angular-contact ball bearing generated considerable noise shortly after delivery of the vehicle. The inner and outer rings were made of seamless cold-drawn 52100 steel tubing, the balls were forged from 52100 steel, and the retainer was stamped from 1008...
Image
Published: 01 June 2019
Fig. 1 Forged 1040 steel main-bearing journal that failed in fatigue. Top: Section showing cracks originating at coarse sulfide inclusions. Dimensions given in inches. Bottom: Macrograph of a 5%-nital-etched section showing the segregated inclusions (dark areas). 4x More
Image
Published: 01 June 2019
Fig. 1 52100 steel jet-engine ball bearing that failed because of overheating resulting from misalignment. (a) Photograph of bearing components showing fractured cage. (b) Enlarged view of cage showing damage caused by scoring, scuffing, and plastic deformation around ball pockets More
Image
Published: 01 June 2019
Fig. 1 Plastic-lined stainless steel spherical bearing for a hydrofoil that failed by corrosion fatigue. (a) Construction of bearing and location of fractures. Dimensions given in inches. (b) Fracture surface showing multiple fatigue origins (arrows) at edge of bore and on the spherical More
Image
Published: 01 June 2019
Fig. 1 Large-diameter 4140 steel radar-antenna bearing that failed because of improper heat treatment of outer-ring raceway. (a) Configuration and dimensions (given in inches). (b) Fractograph showing typical damage on outer-ring raceway. (c) Micrograph of section through metal in outer ring More
Image
Published: 01 June 2019
Fig. 1 Low-alloy steel roller bearing from an improperly grounded electric motor that was pitted and etched by electrolytic action of stray electric currents in the presence of moisture. More
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Published: 01 June 2019
Fig. 1 Weld spots on contact surfaces of a type 440C stainless steel ball bearing. The spots are caused by static electrical discharges resulting from use of an electrically nonconductive grease. (a) and (b) Photographs of inner-raceway surface. 10 and 100├Ś, respectively. (c) and (d) SEM More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001754
EISBN: 978-1-62708-241-9
... online) Fig. 12 Representative EDS qualitative chemical analysis of the fragments shown in Fig. 11 Abstract The case study presented in this article details the failure investigation of an M50 alloy steel bearing used in a jet engine gearbox drive assembly. It discusses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001630
EISBN: 978-1-62708-236-5
... Abstract On 22 Feb 1997, one of the arms on an amusement park ride became detached from the central pylon, allowing the passenger carriage at the end of the arm to fall to the ground. Detachment of the arm was found to have occurred as a result of fracture of the cast steel bearing cap...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001762
EISBN: 978-1-62708-241-9
... bearings riding on the axle. Stub axles use ball bearings that run on induction hardened axles and are bolt on assemblies. Both designs are usually made from 1050 steel or similar steel with increased manganese for hardenability [ 1 ]. Semi-float axles are induction hardened from the axle flange radius...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001551
EISBN: 978-1-62708-233-4
... indicating rotational vibration fatigue. Keeping bolts tight solved this problem. In another case, grinding machines were unable to produce surfaces of uniform quality and smoothness on steel bearing products. Measurements showed that self-excited vibrations were created when particular steels were ground...
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.c9001740
EISBN: 978-1-62708-234-1
... into severe coarse-grain spalling. Bearings Contaminants Powders Spalling Steel bearing Spalling wear Contamination of lubrication with powdered stone resulted in progressive wear of internal surfaces of bearing. Because of the motion of rollers, the inner race exhibited an unusual cyclic wear...
Image
Published: 01 June 2019
Fig. 1 Cracked type 440C stainless steel (a) aircraft wing flap hinge bearings. (b) Crack configuration of bearing 1 from (a). (c) Crack configuration of bearing 2 from (a). (d) Fracture surface of second crack in bearing 1. Arrow shows the probable fracture origin. 2.5x. (e) Fracture surface More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001545
EISBN: 978-1-62708-236-5
... Abstract The presence of secondary, branching intergranular stress-corrosion cracking in a type 440C stainless bearing caused the analyst to overlook the real culprit, which was a mechanically-initiated, primary transgranular crack that propagated through the steel's hard chromium carbide...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001510
EISBN: 978-1-62708-217-4
... of the grip body outer diameter. Examination of the internal diameter showed that the crack formed beneath an interference fit steel bearing liner and propagated through the thickness of the grip. The crack was subsequently opened for examination of the fracture surface features. Fig. 1 Macroscopic...