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forging die

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Published: 01 September 2008
Fig. 35 Example of die failure in a hot forging die caused by coarse grain size and strong precipitation of proeutectoid carbides on austenite grain boundaries. (a) Aspect of the tool. (b) and (c) Microstructure showing the coarse grain size (approximately ASTM 4; expecte d ASTM 8 to 10 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
... Abstract This chapter addresses the issue of die failures in hot and cold forging operations. It describes failure classifications, fatigue fracture and wear mechanisms, analytical wear models, and the various factors that limit die life. It also includes several case studies in which finite...
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Published: 01 September 2008
Fig. 42 (a) Microstructure of working regions of valve forging die in Fig. 41 (region A). Note the intense cracking and thick nitrided layer (double the expected). Also note the surface white layer, which corresponds to brittle untempered martensite, obtained by rehardening of the tool More
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Published: 01 December 2003
Fig. 1 Core support of the nitrided case on a forging die. Source: Ref 1 More
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Published: 01 December 2003
Fig. 14 Gross heat checking in a low-alloy tool steel forging die due to excessive temperature. Heat checking occurred after an undetermined number of 225 kg (500 lb) nickel-base alloy preforms had been forged from an average temperature of 1095 °C (2000 °F). Source: Ref 11 More
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Published: 01 November 2013
Fig. 7 Section through a forging, die finisher impression showing flash clearance, flash land, and gutter. Source: Ref 7 More
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Published: 01 February 2005
Fig. 6.5 Temperatures at the surface and at various depths in the forging die obtained in forging of 1040 steel without a lubricant (sample 1.125 in., or 29 mm, high; reduction in height, 75%; sample temperature, 2050 °F, or 1120 °C; die temperature, 450 °F, or 230 °C). [ Vigor et al., 1961 ] More
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Published: 01 February 2005
Fig. 22.1 Typical failure modes and locations in precision-forging die [ Schey, 1983 ] More
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Published: 01 February 2005
Fig. 22.30 Hot precision forging die [ Bobke, 1991 ] More
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Published: 01 February 2005
Fig. 23.6 Enclosed forging die set developed by Yamanaka Engineering [ Yamanaka et al., 2002 ] More
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Published: 01 February 2005
Fig. 23.7 Some example parts forged in an enclosed forging die set [ Yamanaka et al., 2002 ] More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040185
EISBN: 978-1-62708-300-3
... Abstract This chapter presents a relatively simple method for estimating forging loads and flow stresses. The method uses the slab analysis technique and accounts for material properties, friction and heat transfer, press ram speed, forging geometry, and billet and die temperatures. The chapter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040257
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the processes of isothermal and hot-die forging and their use in producing aerospace components. It explains how isothermal forging was developed to provide a near-net shape component geometry and well-controlled microstructures and properties with accurate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040159
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the factors involved in the design of impression-die forging systems. It begins by presenting a flow chart illustrating the basic steps in the forging design process and a block diagram that shows how key forging variables are related. It then describes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
... a variety of application examples. closed-die forging finite-element analysis impression-die forging microstructure process modeling 16.1 Introduction Development of finite-element (FE) process simulation in forging started in the late 1970s. At that time, automatic remeshing...
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Published: 01 November 2013
Fig. 10 Open-die forging. Source: Ref 9 Definition Open-die forging is a hot forging process in which metal is shaped by hammering or pressing between flat or simple contoured dies. Equipment Hydraulic presses, hammers Materials Carbon and alloy steels, aluminum alloys More
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Published: 01 February 2005
Fig. 23.5 Enclosed-die forging. 1, billet; 2, upper die; 3, lower die; 4, upper punch; 5, lower punch; 1′, finished part [ Oudot et al., 2001 ] More
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Published: 01 February 2005
Fig. 12.17 Illustration of closed-die forging with a rotary forging machine. 1, rotating upper platen; 2, workpiece; 3, lower die; 4, ejector More
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Published: 01 February 2005
Fig. 14.15 Schematic of a simple closed-die forging and forging stress distribution [ Subramanian et al., 1980 ] More
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Published: 01 February 2005
Fig. 16.7 Comparisons of hot-die forging and mechanical press forging of an experimental part using process modeling More