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high-alloy tool steels

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Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... or in the specifications ( Ref 15 ). In-Service Part Failures Caused by Metallurgical Factors In many workpiece bars and blanks, the carbide spheroids in high-carbon, high-alloy tool steels, such as the AISI M x , T x , H x , D x , O x , S x , L x , P x , and W x tool steels, are often large and widely dispersed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047010
EISBN: 978-1-62708-234-1
... including a maraging steel (18% Ni, grade 250), a vanadium-modified 4337 gun steel (4337V), H19 tool steel, and high-temperature alloys Rene 41, Inconel 718, and Udimet 630. All the alloys evaluated had been used in mortar tubes previously or were known to meet the estimated minimum yield strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001250
EISBN: 978-1-62708-223-5
... Abstract A broken cross-recessed die was examined. Examination of the unetched, polished section for impurities revealed several coarse streaks of slag. The purity did not therefore correspond to the requirements set for a high speed tool steel of the given theoretical quality DMo 5. After...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
.... This sensitivity to processing stems from the use of tools and dies at these very high hardness levels, at which minor deficiencies in processing exert major influences on performance. Mechanical Testing of Tool Steels For the majority of tool steels, tensile tests at room temperature are not conducted...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
...-working and hot-working applications. It reviews problems introduced during mechanical design, materials selection, machining, heat treating, finish grinding, and tool and die operation. The brittle fracture of rehardened high-speed steels is also considered. Finally, failures due to seams or laps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089456
EISBN: 978-1-62708-223-5
..., together with its higher alloy content, makes the region more responsive to what would have been normal heat treatment for this grade of tool steel. The high-hardness material is also subject to microcracking on quenching; microcracks can act as nuclei for subsequent fatigue cracks. Examination...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... tools. Using high-speed photography, these researchers determined that the velocity of a hammer head striking 16-penny nails being driven into wood by an experienced carpenter was 14 m/s (45 ft/s), and, furthermore, when striking a hammer against a steel anvil in a deliberate attempt to cause spalling...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001014
EISBN: 978-1-62708-223-5
... the exteriors of the parts were clean and smooth, and there was evidence of a case. Examination of the flat surfaces of the parts revealed surface cracking where actual failure had not occurred. Chemical analysis showed the material to be a low-alloy carburizing steel. The microstructure was compatible...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
... lower matrix hardness and high sulfur content of the material, which contributed to lower ductility through increased nucleation sites. It was recommended that the hob manufacturer specify a minimum amount of required reduction for the original bar of tool steel material, to provide for sufficient...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0009222
EISBN: 978-1-62708-180-1
... in carbon arid low-alloy tool steels. It introduces a tendency for tool corners to spall off during hardening ( Fig. 6 ). The cure: hold a tool long enough at a temperature so that it is heated uniformly before being quenched. Fig. 5 Quenching from too high a temperature cracked this manganese oil...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
... chromium tool steel) UNS T30402 Introduction and Background Information The crimping machine is used for repetitive crimping of connectors in a production setting. This system operates at high cycles and must maintain its integrity over time. It is therefore important to minimize downtime...
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
...-intermediate drive roll is similar to that of a hot-work tool steel of the H13 type ( Ref 3 ). Unlike Sendzimir mill work rolls, which are usually made from high carbon-high chromium varieties of D2 (1.25 wt% C, 12 wt% Cr) or D4 (2.25 wt% C, 12 wt% Cr) type cold-work tool steels ( Ref 4 ) or of tungsten...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001121
EISBN: 978-1-62708-214-3
... of the piece (typical of quench cracking). Nital etch. 250├Ś. Chemical Analysis/Identification Chemical analysis identified the material as AISI D2 (high-carbon/high-chromium) tool steel. Mechanical Properties Hardness The hardness of the as-received tool was 62 to 64 HRC, indicating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0046366
EISBN: 978-1-62708-236-5
... Abstract Several large chromium-plated 4340 steel cylinders were removed from service because of deep longitudinal score marks in the plating. One of the damaged cylinders and a mating cast aluminum alloy B850-T5 bearing adapter that also exhibited deep longitudinal score marks were submitted...
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
... with permission from Elsevier Fig. 10 Surface damage typical of galling wear on high-strength steel sheet material. Source: Ref 58 The tendency for galling is a limiting factor in many tribosystems ( Ref 55 ). As a severe form of adhesive wear, the galling of tools is a frequent and major...
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
... Abstract Failure analysis results were employed to identify a better alloy. Chipper knives used in the field to chip logs failed frequently. The knives were made of alloys with a composition of Fe-0.48C-0.30Mn-0.90Si-8.50Cr-1.35Mo-1.20W-0.30V. The development of tougher alloy steel...
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 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 through...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047779
EISBN: 978-1-62708-223-5
... in a brittle manner at a tensile stress of 1572 MPa (228 ksi). The microstructure of the steel was fine, dispersed, tempered martensite with elongated stringers of manganese sulfide. Also present were spheroidized white particles that were identified as high-alloy complex carbides (M 6 C) corresponding...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
..., with an additive for corrosion protection and lubrication, should be directed uniformly into the cut. Wet cutting produces a smooth surface finish and, most importantly, guards against excessive surface damage caused by overheating. Figure 1 shows the surface of quenched and tempered A2 tool steel (59 HRC) cut...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... is that the increased carbon content of the segregated region, together with its higher alloy content, makes the region more responsive to what would have been normal heat treatment for this grade of tool steel. The high-hardness material is also subject to microcracking on quenching; microcracks can act as nuclei...