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heat treating of steels

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001642
EISBN: 978-1-62708-235-8
...Abstract Abstract A plant had manufactured and heat treated their product in house for years. As time went on, the special steel that they had been using became more expensive, and a switch was made to a more common and less highly alloyed material. However, no change in hardness specifications...
Image
Published: 30 August 2021
Fig. 52 Micrograph of high-temperature hydrogen attack of postweld heat treated carbon steel in hydrogen service. (a) Etched with 2% nital solution to show weld and heat-affected zone (HAZ). (b) As-polished to show fissures, including an almost through-wall crack on the HAZ on the left. Source More
Image
Published: 01 January 2002
Fig. 4 A properly heat treated tool of manganese oil-hardening steel has a martensitic structure (left) containing fine tempered martensite and carbides. An overheated tool material has an acicular martensitic structure (right) that cracks easily (see Fig. 5 ). Etchant, Nital; 700X. More
Image
Published: 30 August 2021
Fig. 100 Operation history since 2009. CS, carbon steel; PWHT, postweld heat treat More
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
... the oil hole. The shaft had been made from a heat-treated alloy steel. The thickness of the plating was approximately 0.025 in. and numerous cracks were visible in it, several of which had given rise to cracks in the steel below. The primary cause of the crankshaft failure was the plating of the crankpins...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0092142
EISBN: 978-1-62708-217-4
... splice attachment. The bolt was fabricated from PH13-8Mo stainless steel heat treated to have an ultimate tensile strength of 1517 to 1655 MPa (220 to 240 ksi). A water-soluble coolant was used in drilling the bolt hole where this fastener was inserted. Investigation (visual inspection, 265 SEM images...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047856
EISBN: 978-1-62708-217-4
...Abstract Abstract The master connecting rod of a reciprocating aircraft engine revealed cracks during routine inspection. The rods were forged from 4337 (AMS 6412) steel and heat treated to a specified hardness of 36 to 40 HRC. H-shaped cracks in the wall between the knuckle-pin flanges were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001183
EISBN: 978-1-62708-223-5
... showed the structure of a heat treated alloy steel ( Figs. 2 ). A strongly fissured and therefore brittle alloy zone was in contact with the steel. The existence of a superlattice phase Fe 3 Al was probable. At the outer edge metal was adhering at some places that was roughened during polishing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0065827
EISBN: 978-1-62708-221-1
... Voort G.F. , “Steel Composition for Chipper Knife,” U.S. Patent 4,353,743 , 12 Oct 1982 2. Vander Voort G.F. , “Method of Heat Treating a Steel Composition for Chipper Knife,” U.S. Patent 4,353,756 , 12 Oct 1982 Selected References Selected References...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001399
EISBN: 978-1-62708-220-4
... of effects since sulphides favour this mode of failure in heat treated alloy steels. Condensation has been occurring on the 1st stage impeller but not on the subsequent stages due to the rise in air temperature through the compressor. The lack of cracking on the eyeplate was presumably due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
...Abstract Abstract The bolt in a bolt and thimble assembly used to connect a wire rope to a crane hanger bracket was worn excessively. Two worn bolts, one new bolt, and a new thimble were examined. Specifications required the bolts to be made of 4140 steel heat treated to a hardness of 277...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001131
EISBN: 978-1-62708-214-3
...Abstract Abstract Two 25 x 40 mm (1 x 1.5 in.) AISI 4150 hot-rolled steel bars that cracked during heat treatment were examined to determine whether the heat treating procedure had contributed to the failure. Metallographic examination of a cross section taken through the fracture revealed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001093
EISBN: 978-1-62708-214-3
...Abstract Abstract A heat-treated, cadmium-plated AISI 8740 steel bolt broke through the head-to-shank fillet while being handled during assembly. Fractographic and metallographic examination of the bolt traced the cause of failure to quench cracking, which occurred when the part was water...
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
... associated with distortion and cracking are summarized in a fishbone diagram ( Fig. 1 ), with additional details summarized in Table 1 . Fig. 1 Fishbone diagram of factors that may contribute to cracking or excessive distortion in heat treated steels. See Table 1 for additional details. Causes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0001784
EISBN: 978-1-62708-218-1
... in.) radius shown in Fig. 1 . The lever is pivoted in a ball socket, and the maximum load transmitted at end A is 1.8 kN (400 lbf). The steel is 1049 hardened to 269 to 285 HB, with properties as given in Table 1 . Fatigue strength of heat-treated wrought steel of various Brinell hardness ranges...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001196
EISBN: 978-1-62708-224-2
... could have caused the cracks. Fig. 1 Fracture surface. 1 2 × The results of a chemical analysis showed that the steel from which the fork was made was EN-25. This steel is suitable for this type of application and can be heat treated satisfactorily even in relatively large sizes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006394
EISBN: 978-1-62708-217-4
...Abstract Abstract A preflight inspection found a broken diaphragm from a side controller fabricated from 17-7 PH stainless steel in the RH 950 heat treatment condition. Failure occurred by cracking of the base of the flange-like diaphragm. The crack traveled 360 deg around the diaphragm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001260
EISBN: 978-1-62708-235-8
...Abstract Abstract One percent Cr-Mo low alloy constructional steel is widely used for high tensile applications, e.g., for manufacture of high tensile fasteners, heat treated shafts and axles, for automobile applications such as track pins for high duty tracked vehicles etc. The steel is fairly...
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
... carbides, and a maximum hardness ranging within 870 to 900 HV ( Fig. 9 ). Similar microstructure is observed also in heat treated AISI H13 tool steel [ 10 ]. A hardness distribution profile indicated a hardness drop (maximum decrease up to around 180 HV at a depth up to ~80 μm), probably associated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046205
EISBN: 978-1-62708-225-9
...Abstract Abstract The splined shaft (1040 steel, heat treated to a hardness of 44 to 46 HRC and a tensile strength of approximately 1448 MPa, or 210 ksi) from a front-end loader used in a salt-handling area broke after being in service approximately two weeks while operating at temperatures...