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carbonitriding

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046195
EISBN: 978-1-62708-225-9
... and was case hardened to a depth of 0.13 to 0.4 mm (0.005 to 0.015 in.) by carbonitriding. Specifications required that the part be carbonitrided, cooled, rehardened by quenching from 790 deg C (1450 deg F), then tempered at about 175 deg C (350 deg F). Visual examination, hardness testing, and metallographic...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... and material factors that cause a part to fail during heat treatment. The article discusses the problems associated with heating and furnaces, quenching media, quenching stresses, hardenability, tempering, carburizing, carbonitriding, and nitriding as well as potential stainless steel problems and problems...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091754
EISBN: 978-1-62708-229-7
... of a total collapse of the duct. Carbides and carbonitrides were found in all of the transitions examined. Investigation supported the conclusion that failure was caused by oxidation, oxide penetration, and oxide spallation which caused thinning of the duct wall. It was felt that the high oxygen and nitrogen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... of alternative solutions were identified and then validated based on chemical analysis, endurance and hardness tests, and microstructural examination. The investigation revealed that carbonitriding can effectively eliminate the type of failure encountered because it prevents through hardening of the bearing cup...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... boundaries, and some have grown and coalesced. Original magnification: 210×. Courtesy of U.S. Navy Fig. 2 High-temperature degradation of a gas turbine transition duct. (a) Carbide, carbonitride precipitates, and oxide penetration along grain boundaries. (b) Creep cracking along grain-boundary...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... carbides-moderately dissolved Body: 1D I.D. oxidation up to 3 mm, stemming from shrinkage porosity heavily spherodized, grey, primary carbonitrides O.D. surface decarburization with oxidation - 1 mm thick non-aligned creep voids throughout 1C similar to above...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
..., and titanium carbonitride constitute the main inclusions of the drilling bit. There are no cracks around these inclusions. As size of the inclusions is controlled around 10 μm, these inclusions are not the main reason for the fracture. Size and morphology of the inclusions shall be strictly controlled during...
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
... to ductile fracture. Fig. 12 SEM micrograph of the steel tested at 800 °C showing a ferrite–pearlite (ductile) decohesion The importance of decohesions is evident if the role of Ti and Nb carbides (or carbonitrides) is taken into account as these particles are not dissolved during the 800 °C...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
... though banded) distribution of bulky and brittle primary titanium carbonitrides. Grain boundary embrittlement caused by secondary carbide precipitates. This alloy is both ductile and tough and not at all susceptible to this kind of material property degradation. Also, excessive secondary carbide grain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001910
EISBN: 978-1-62708-217-4
... , American Society for Metals , Materials Park, OH , 1979 , p. 370 . 2. Vishnevsky C. : Interim Report—Contract DAAG 46–69-C-0060 , Army Materials and Mechanics Research Center , February 1970 , p. 34 . 3. Anon. : in Carburizing and Carbonitriding , Gray A.G. , ed., American...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046252
EISBN: 978-1-62708-229-7
... through breakdown of an oil contaminant in the nitrogen gas. This condition was observed in all of the piping. The microstructure was normal for annealed type 347 stainless steel. Large particles, probably niobium carbides (NbC) and complex carbonitrides (NbC,N), were randomly dispersed through...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001722
EISBN: 978-1-62708-236-5
... not exceeding 65 t.p.s.i., or have been nitrided, no further heat treatment is normally required before plating. In the case of parts made from steel hardened and tempered to a tensile range exceeding 65 t.p.s.i., or which have been carburised, flame-or induction-hardened, or carbonitrided, it is preferable...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
.... Carburizing, carbonitriding, and other methods use altered surface compositions to increase surface hardenability in applications when lower subsurface properties are desired. In many cases, failures can result directly from unanticipated heat treating results. It should be mentioned that heat treatment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... carbonitride (TiCN) particle ( Fig. 10b ). The fracture surface in the fatigue zone was composed of ridges oriented parallel to the direction of crack propagation, also typical of mode III fatigue fracture ( Fig. 11a and b ). Examination of the inner portion of the fracture showed that the fracture had...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... steel tube Fig. 2 High-temperature degradation of a gas turbine transition duct. (a) Carbide, carbonitride precipitates, and oxide pentration along grain boundary. (b) Creep cracking along grain-boundary precipitates (arrows) on IN-617 panel. Creep cavities along grain boundaries link up...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... was responsible for initiating thumbnail ( Fig. 5 ) or corner-type ( Fig. 5 ) cracks. In most specimens, cracks initiated near the subsurface primary particles—probably carbides or carbonitrides. Multiple crack initiation sites were also found ( Fig. 5 ). Results of a detailed analysis of the crack initiation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... to provide a tensile test coupon, the most susceptible parts are those that have a carburized or carbonitrided case. Even one layer of grains at the surface of the part may allow the part to become affected by hydrogen embrittlement. In this case, even the Rockwell hardness test is invalid. The actual test...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... coupon, the most susceptible parts are those that have a carburized or carbonitrided case. Even one layer of grains at the surface of the part may allow the part to become affected by hydrogen embrittlement. In this case, even the Rockwell hardness test is invalid. The actual test must be performed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1