1-20 of 39 Search Results for

hot-die forging

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... and macroscopic inspection, metallographic and chemical analysis, SEM imaging, optical profilometry, mechanical property testing, and EDX analysis. The die was made of chromium hot-work tool steel and the forgings were made of CuZn39Pb3 heated to an initial working temperature 700 deg C. The entire surface...
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
.... Primary deformation processes, such as hot rolling, extrusion, and open-die forging, are then used for converting the cast structure to a fine-grained wrought structure while reducing the ingot to a more usable size and shape. Most large open-die forgings are forged directly from ingots, while most closed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001270
EISBN: 978-1-62708-215-0
.... The upper die is then dropped or propelled downward onto the bottom impression. This hammering forces the hot metal to flow and conform to the die impression. The finishing impression is generally the censer section of the die. It is used to produce the final shape before trimming. Closed-die forgings can...
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
... molds or by continuous casting techniques. Primary deformation processes, such as hot rolling, tube piercing, extrusion, and open-die forging, are then used for converting the cast structure. Many large open-die forgings are forged directly from ingots, while most closed-die and upset forgings...
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 Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... Abstract This article discusses failure mechanisms in tool and die materials that are very important to nearly all manufacturing processes. It is primarily devoted to failures of tool steels used in cold working and hot working applications. The processes involved in the analysis of tool...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... Abstract Several failed dies were analyzed and the results were used to evaluate fatigue damage models that have been developed to predict die life and aid in design and process optimization. The dies used in the investigation were made of H13 steels and fractured during the hot extrusion of Al...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001359
EISBN: 978-1-62708-215-0
... investigation revealed that fused material from the blade had been thrown onto the cold blade surface during a grinding operation to remove the targeting bosses from the forgings, thereby causing local embrittlement. It was recommended that extreme care be taken during grinding operations to prevent the hot...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001302
EISBN: 978-1-62708-215-0
... In order to determine whether it was possible that defects present in the blanks before the forging operation (i.e. developed during hot rolling of the bar stock) could be responsible for the cracking observed in the defective kingpins, some starting blanks containing saw cuts were forged at the forging...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... are presented in Table 1 . Steel die forging was applied as the processing technique for the failed steady clamps, with forging temperature of 700–900 °C. A schematic diagram of the steady clamp is presented in Fig. 1 . The investigated steady clamp consisted of three components: a splint, a noumenon, and two...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... reaction, alligator skin D 135 Grooves and roughness in the vicinity of re-entrant angles on die castings Soldering, die erosion D 140: Depressions in the casting surface D 141 Casting surface depressions in the vicinity of a hot spot Sink marks, draw or suck-in D 142 Small...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... the surface and the core, shown at the bottom right in Fig. 10 ( Ref 9 ), is obtained. If the surface stresses exceed the hot yield strength of the material, it plastically deforms, resulting in thermally induced dimensional changes. Cooling with Transformation...
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
... transformation of the nondecarburized area will reduce the favorable compressive stresses at the surface. In the worst case, the surface will be in tension up to the point of cracking. This is a more severe problem in steels with higher hardenability. Castings, forgings, cold-finished stock, and hot rolled...
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
... A. , and Bhattacharyya S.K. , Spalling Resistance of Forged Steel Cold Rolling Mill Rolls: A Microstructural Insight , Mater. Forum , Vol 16 ( No. 4 ), 1992 , p 317 – 325 3. Roberts G.A. and Cary R.A. , Class 520 Chromium-Molybdenum Hot Work Die Steels , Tool Steels , American Society...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... of veins on the casting surface Veining or finning A 113 Network of projections on the surface of die castings Heat-checked die A 114 (a) Thin projection parallel to a casting surface, in re-entrant angles Fillet scab A 115 Thin metallic projection located at a re-entrant angle...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... be difficult to determine where the nickel plating ends and the surface begins, as shown in Fig. 11(d) . Figure 12 shows an example of ion-nitrided hot work die steel with a brittle white-etching iron nitride surface layer that is quite visible when mounted in Epomet resin but would probably be very hard...
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
... contrast, it may be difficult to determine where the nickel plating ends and the surface begins, as shown in Fig. 3 (d). Figure 4 shows an example of ion-nitrided hot work die steel with a brittle white-etching iron nitride surface layer that is quite visible when mounted in a mineral-filled epoxy resin...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
... are very important to failure prevention. Failures have also occurred where names, numbers, and other identification marks are die stamped or imprinted on highly stressed surfaces. Information on the effects of identification marks is provided in the articles “Fatigue Failures” and “Failures of Shafts...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
..., but not welded, by working the metal. Seams seldom penetrate to the core of bar stock. Seams may cause additional cracking in hot forging and quench cracking during heat treatment. Oxides in a seam can be the result of exposure to elevated temperatures during processing. Seams are sometimes difficult to detect...