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Rolling mills

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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 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...
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 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.c9001255
EISBN: 978-1-62708-232-7
...Abstract 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...
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 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...
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 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...
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 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048273
EISBN: 978-1-62708-225-9
... teeth Rolling mills Shock loading 2317 Fatigue fracture The bevel pinion shown in Fig. 1(a) was part of a drive unit in an edging mill. The pinion had been in service about 3 months when several teeth failed. Specifications required that the pinion be made from a 2317 steel forging...
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
... be very 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...
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
..., including 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...
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 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...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... hot rolling mills . J. Tsinghua Univ. (Sci&Technol) 45 , 1668 – 1671 ( 2005 ) 22. Takechi H. , Namba K. , Fujiwara K. et al. , Evaluation of subsurface fatigue damage in strip mill rolls by an x-ray diffraction method . Trans. Iron Steel Inst. Jpn. 21 , 92 – 99...
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
... , Iron and Steel Society (ISS) , Warrendale, PA ( 2002 ) 3. Venugopal Reddy A. : Investigation of Aeronautical and Engineering Failures , CRC Press ( 2004 ) 4. Prasad M.S. , Dhua S.K. , Singh C.D. , Ray A. : Genesis of spalling in tandem mill work-rolls: some...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001232
EISBN: 978-1-62708-233-4
... of a valve spring, origin of fracture marked by arrow. 10× Fig. 6 Broken cabin bolt from an elevator. 1× Fig. 7 Broken cam of a rolling mill clutch with many vibrational fractures originating from a key-groove, Approx 1 2 × Fig. 8 a). Broken piston rod of a steam...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
...-phase steels . Metall. Mater. Trans. A 40A , 2145 – 2159 ( 2009 ) 10.1007/s11661-009-9899-9 10. Quintana M.J. , Gonzalez R. , Verdeja L.F. , Verdeja J.I. : Dual-phase ultrafine-grained steels produced by controlled rolling processes . In: Materials Science...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
..., 11,000 volts, 745/592 rpm. It drove two 1,615 kW, 420 volt, D.C. generators with a 25-ton flywheel interposed between them, supplying power to a 4,000 hp 840 volt 43/90 rpm, D.C. motor driving a rolling mill at a steel works. The machine had been in almost continuous operation for seven years, the first...
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
... 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. Recall that once placed in operation with a felt speed of 3100 ft/min (946 m/min...
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
... are typically limited to two-dimensional deformation. Metalworking operations are also classified as either primary 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...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... encountered in sugar mills was analyzed (Ref 5). The cane juice is extracted using cane-crushing mills, which consist of four or six rolls. To optimize the extraction of juice, these crushing rolls are designed with a high coefficient of friction and very low rotational speed (4 to 5 rpm). The journals...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048073
EISBN: 978-1-62708-224-2
...Abstract Abstract A drum pinion shaft (1030 steel) which was part of the hoisting gear of a crane (capacity 18,140-kg) operating in a blooming mill failed while lifting a 9070 kg load. Chatter marks, rough-machining marks, and sharp corner radii were revealed in the keyway which extended...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001730
EISBN: 978-1-62708-229-7
.... Then another crack developed adjacent to the original crack, eventually causing the failure. The shaft, welded by our technicians in October 1966, is still functioning with no indication of trouble. Details of the Mill How Failure Occurred Selected References Selected References • Wulpi D.J...