1-20 of 352 Search Results for

hot 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 Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
... cold forging or hot forging in terms of preforge factors and/or discontinuities generated by the forging process. Supporting topics that are discussed in the case studies include validity checks for buster and blocker design, lubrication and wear, mechanical surface phenomenon, forging process design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040115
EISBN: 978-1-62708-300-3
... process must be compatible with the load, energy, time, and accuracy characteristics of a given forging machine. There are basically three types of presses: hydraulic, mechanical, and screw presses. These machines are used for hot and cold forging, cold extrusion trimming, and coining...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
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.t51040185
EISBN: 978-1-62708-300-3
... , American Society for Metals , 1983 . [Mohammed et al., 1999] Asaduzzaman M. , Demir A. , Vazquez V. , Altan T. , “ Development of Computer Program for Estimation of Forging Load and Die Pressures in Hot Forging, ” Report No. F/ERC/NSM-99-R-18, Engineering Research Center for Net...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040277
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the factors that affect die steel selection for hot forging, including material properties such as hardenability, heat and wear resistance, toughness, and resistance to plastic deformation and mechanical fatigue. It then describes the relative merits of various...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040247
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the development and use of microstructure models for optimizing superalloy forging operations. It describes how the processes that control grain structure evolution during hot working were used in model formulation and compares predicted microstructures with...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
... of Precision Forgings, ” Technical Report AFML-TR-72-89, Battelle Columbus Laboratories , 1972 . [Brucelle et al., 1999] Brucelle O. , and Bernhart G. ,” Methodology for Service Life Increase of Hot Forging Tools, ” Journal of Materials Processing Technology , Vol. 87 , 1999 , p...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... capability of the material to deform without failure; it depends on (a) conditions existing during deformation processing (such as temperature, rate of deformation, stresses, and strain history) and (b) material variables (such as composition, voids, inclusions, and initial microstructure). In hot forging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
... ¯ , the interface friction conditions, and the forging geometry (dimensions, shape) determine (a) the load, L P , at each position of the stroke and (b) the energy, E P , required by the forming process. Fig. 10.1 Relationships between process and machine variables in hot forming process conducted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040141
EISBN: 978-1-62708-300-3
... . [Walter, 1965] Walter L. , “ Use of Precision Forging Machines, ” Met. Treat. , Aug 1965 , p 296 . Prior to forging in an impression die, billet stock must be often preformed to achieve adequate material distribution, especially in hot forging with flash. Several special machines are...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040159
EISBN: 978-1-62708-300-3
...] Vieregge K. , “ Contribution to Flash Design in Closed Die Forging, ” Doctoral dissertation , Technical University of Hannover , 1969 . Selected References [Brucelle et al., 1999] Brucelle O. , and Bernhart G. , “ Methodology for Service Life Increase of Hot Forging Tools...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040091
EISBN: 978-1-62708-300-3
... case discussed in the previous section. It should be noted, however, that the results obtained from the plane strain simulation have to be multiplied by the length of the billet used for the forging process to get the final results. Figure 9.8 shows the FE model of the hot forging process of an...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040211
EISBN: 978-1-62708-300-3
... ; Billigmann et al., 1973 ; Watkins, 1973 ; and Altan et al., 1983 ]. These operations are usually performed in mechanical or hydraulic presses, which are discussed in Chapter 10, “Principles of Forging Machines,” and Chapter 11, “Presses and Hammers for Cold and Hot Forging.” Several forming steps are...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
... measured with the ring compression test, however, are not valid for precision cold forging processes (hot, warm, and cold) where the interface pressure is very high and the surface generation is large. The friction conditions change during the process due to changes in the lubricant and the temperature at...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040319
EISBN: 978-1-62708-300-3
... the current capabilities of FEM in simulating complex and incremental cold forging operations to optimize process conditions and product design. Fig. 23.21 Finite-element simulation of orbital forming (finite-element model and stress distribution) [ Altan et al., 2003 ] Machines for hot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040067
EISBN: 978-1-62708-300-3
... chapter also describes several test methods for evaluating lubricants and explains how to interpret associated test data. cold forging friction hot forging lubrication References [Altan, 1970] Altan T. , “ Heat Generation and Temperatures in Wire and Rod...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040017
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the role of plastic deformation in forging and the effect of strain and strain rate on metal flow. It demonstrates the use of stress tensors and shows how metal flow can be represented qualitatively by the displacement of volume elements and quantitatively by the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... Transfer and Friction During Hot Forging ,” Report No. ERC/NSM-B-89-20, ERC for Net Shape Manufacturing, Ohio State University , June 1989 . [Douglas et al., 1971] Douglas J.R. , Altan T. , “ Characteristics of Forging Presses: Determination and Comparison, ” Proceedings of the 13th...