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Bearing steel

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Published: 15 January 2021
Fig. 11 Micrograph white etching bands in bearing steel. LABs, low-angle bands; HABs, high-angle bands. Source: Ref 33 More
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.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.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...
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.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.mech.c9001243
EISBN: 978-1-62708-225-9
... of environment because of constant temperature changes, and they normally are replaced after eight months. The bearings were lubricated by a molybdenum sulfide paste. Judging by their structure the needles probably consisted of ball bearing steel. They showed corroded initial cracks of the pitting type, i.e...
Image
Published: 01 January 2002
Fig. 26 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). 4× More
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Published: 01 January 2002
Fig. 6 Fretting on the outside surface of steel backing of a sliding bearing. More
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Published: 01 January 2002
Fig. 8 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
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Published: 01 January 2002
Fig. 6 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×, respectively. (c) and (d) SEM More
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Published: 01 January 2002
Fig. 7 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 January 2002
Fig. 22 Stress butterflies (microstructural alterations) in a steel bearing ring. 4% nital etch. Approximately 425× More
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Published: 01 January 2002
Fig. 23 Microstructural alterations in a 52100 steel bearing ring. (a) Micrograph of picral-etched section through a spalled area showing elongated bandlike microstructural alterations. 200×. At the top is a profile of the bottom of the spalled area. (b) Macrograph of part of the spalled area More
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Published: 01 January 2002
Fig. 28 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
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Published: 01 January 2002
Fig. 29 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
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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 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 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