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rolling mill rolls

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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.c9001231
EISBN: 978-1-62708-232-7
... Abstract The rim of a gear wheel of 420 mm width and 3100 mm in diam broke after four years of operation time in a sheet bar three-high rolling mill. The rim was forged from steel with about 0.4C, 0.8Si and 1.1Mn. The rim started to break in the tooth bottom from a fatigue fracture which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
... Abstract Several back up rolls of 1400 mm barrel diam from a broad strip mill broke after a relatively short operating time as a result of bending stresses when the rolls were dismantled. The fracture occurred in the conical region of the neck at about 600 mm diam. The rolls were shaped steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
... Abstract Although a precise understanding of roll failure genesis is complex, the microstructure of a broken roll can often unravel intrinsic deficiencies in material quality responsible for its failure. This is especially relevant in circumstances when, even under a similar mill-operating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
... Abstract Work rolls made of indefinite chill double-poured (ICDP) iron are commonly used in the finishing trains of hot-strip mills (HSMs). In actual service, spalling, apart from other surface degeneration modes, constitutes a major mechanism of premature roll failures. Although spalling can...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001245
EISBN: 978-1-62708-232-7
... sensitive against additional stresses, be these of a mechanical or thermal nature. This contributed to the fragmenting of the roll face. Cracking (fracturing) Residual stress Rolling mill rolls Thermal stresses Fe-0.83C-1.60Cr Heat treating-related failures A working roll of 210 mm diameter...
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Published: 01 January 2002
Fig. 10 Large circular spall on forged, hardened alloy steel mill roll. Faint white arrow marks location of subsurface fatigue origin. Beach marks are evident within the fatigue propagation zone, which is surrounded by fast brittle fracture. Source: Ref 4 More
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Published: 01 June 2019
Fig. 7 Broken cam of a rolling mill clutch with many vibrational fractures originating from a key-groove, Approx 1 2 × More
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Published: 01 June 2019
Fig. 1 Schematic arrangement of rolls in the 1-2-3-4 type Sendzimir mill More
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Published: 15 January 2021
Fig. 10 Large circular spall on forged, hardened alloy steel mill roll. Faint red arrow marks location of subsurface fatigue origin. Beach marks are evident within the fatigue propagation zone, which is surrounded by fast brittle fracture. Source: Ref 4 More
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Published: 30 August 2021
Fig. 4 A preexisting hot mill rolling crack along the outside surface of the steel. Note the white indications of decarburization along the crack More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
... of damage of forged hardened steel rolls [ 1 , 2 ]. Other common/typical roll failures are considered firecracking and bruises [ 2 ]. Spalling is a fatigue-originated failure that occurs in hot and cold work rolls and often leads to serious damage to the mill. Spalling is related to the thermal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001608
EISBN: 978-1-62708-236-5
... the purchasing specifications and observations and photographs taken during surveys enroute. A frequent conclusion of such investigations is that the alleged corrosion is of no significance or did not occur during the voyage. Mill scale Rusting Storage Hot-rolled steel Uniform corrosion Hot Rolled...
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Published: 01 June 2019
, caused by rubbing during coiling. Such damage is not possible during transport; (b and c) serrated edges on hot rolled steel coil. This condition is a natural result of hot rolling, but it should be trimmed away at the steel mill prior to shipping. More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001842
EISBN: 978-1-62708-241-9
... in the appropriate manner, a roll is balanced [ 2 , 3 ]. It is known that the roll that fractured was ordered along with several other, identical rolls by the mill at the same time. These rolls were first balanced by the manufacturer at 1080 rpm. Upon receipt by the mill, the rolls were rebalanced at 840 rpm...
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Published: 01 June 2019
Fig. 3 Primary fracture (1 in Figs. 1 and 2 ). Fracture surfaces of the rim; on the right: gear side, on the left: rolling mill side. 0.3× More
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Published: 01 June 2019
Fig. 4 Secondary fracture (2 in Figs. 1 and 2 ). Fracture surfaces of the rim; on the right: gear side, on the left: rolling mill side. 0.3× More
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Published: 30 August 2021
Fig. 17 Metallographic cross section through the fracture origin in a paper mill breast roll shaft. Several parallel cracks with wedge-shaped profiles had formed at corrosion pits adjacent to the primary fracture. OD, outside diameter More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001423
EISBN: 978-1-62708-233-4
... Abstract Five cylinders out of a group of nine in a drying machine developed leaks after a few months service in a textile mill. Leakage was reported from locations between the hoop and body and from the circumferential welds. The materials in the affected area were 18/8 Ti and 18/10/3/Mo...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001159
EISBN: 978-1-62708-232-7
... Abstract A recuperator used for preheating the combustion air for a rolling mill furnace failed after a relatively short service time because of leakage of the pipes in the colder part. The 6 % chrome steel pipes used for the warmer part connected by means of welding with austenitic electrodes...