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induction bar heating

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220253
EISBN: 978-1-62708-341-6
... including three arms, 90° wrists, and gripper rotation. From M. R. Farber and G. P. Welch, Industrial Heating , Vol 53, No. 7, July, 1986, p 24 ( Ref 10 ) Fig. 10.9 Cross sections of common induction coil-guide rail arrangements used in bar and billet handling. S-Induction coil. R-Refractory...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
.... Halliday and R. Resnick, Physics , Wiley, New York, 1966 ( Ref 1 ) Fig. 2.3 Effects of (a) nonmagnetic and (b) magnetic bars on the field of magnetic induction (i.e., magnetic flux) within a solenoid coil carrying an electric current. From C. A. Tudbury, Basics of Induction Heating , Vol 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220085
EISBN: 978-1-62708-341-6
... Progress , Vol 94, No. 1, July, 1968, p 78 ( Ref 14 ) Fig. 6.7 Schematic illustration of the surface and center temperature histories of a bar heated by induction. Note that, following an initial transient, the surface-to-center temperature differential is constant during the heating cycle. After...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050175
EISBN: 978-1-62708-311-9
... induction hardening. Stress cracks can be produced in cold-drawn bars that crack during heating up to austenitizing temperature. High nonuniform residual stresses, as discussed in Chapter 5, “Heat Treating Basics,” in this book, can cause the workpiece to crack during heating due to the expansion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... Fig. 10.25 Continuous bar heating: thermal profile of a steel bar as processed through an eight-coil induction line. Source: Ref 11 Fig. 10.26 Models of power density on continuous bar heating. Power density and temperature profiles of a bar at different positions in an in-line induction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... Fig. 1.1 Hardness survey (Rockwell C scale) of hardened tooth, sectioned on center. Magnified 2¾ diameters. Source: Ref 1 Abstract Abstract This chapter provides a brief review of the scientific and technological developments leading to the widespread use of induction heat treating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050215
EISBN: 978-1-62708-311-9
... frequency selections and heating rates for induction hardening of steel parts. (a) Relationship between diameter of round steel bars and minimum generator frequency for efficient austenitizing, using induction heating. (b) Heating rate for through heating of carbon steels by induction. For converted...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050093
EISBN: 978-1-62708-311-9
... the ability of induction heat treating to produce minimum specified case depths. In this test, test bars of normally 25.4 mm (1 in.) in diameter by 102 mm (4 in.) long are fully austenitized. The bars are then removed from the furnace and placed into the test fixture as shown in Fig. 5.6 . Water flow from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
... in specific heat with temperature for materials. Source: Ref 2 Fig. 2.1 Induction coils with electromagnetic fields. OD: outside diameter; ID: inside diameter. Source: Ref 1 Fig. 2.9 Critical diameter as a function of diameter for round bars. Source: Ref 2 Fig. 2.10...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050057
EISBN: 978-1-62708-311-9
... 12 Fig. 4.38 Longitudinal heating coil, single shot with quench. Source: Ref 12 Fig. 4.39 Single-tooth gear coil. Source: Ref 12 Fig. 4.40 Nonencircling U-shaped inductor coil. Courtesy of Bill Stuehr at Induction Tooling. Fig. 4.41 Multiturn solenoid coil...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140189
EISBN: 978-1-62708-264-8
...; the higher the frequency, the lower the skin depth. For the experiment that resulted in the bar shown in Fig. 17.1 , the frequency used was 450 kHz (450,000 cycles/s). For the coil used and with this frequency, the skin depth is calculated to vary as shown in Fig. 17.4 . Fig. 17.4 Induction heating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220001
EISBN: 978-1-62708-341-6
... Nickel-base superalloys Titanium alloys Fig. 1.3 Comparison of times for through heating by induction and gas-fired furnace techniques as a function of bar diameter. From R. Daugherty and A. A. Huchok, Proceedings, 11th Biennial Conference on Electric Process Heating in Industry...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... Zinc 0.07 0.50 Zirconium 0.22 0.40 Fig. 7.5 Schematic coil-current-versus-time curve for a steel bar surface hardened by an induction heating method. The times t m and t p separate the three stages f, f/p, and p. From J. D. Verhoeven, H. L. Downing, and E. D. Gibson, Journal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220185
EISBN: 978-1-62708-341-6
... for heating off the end of a bar Source: American Induction Heating Corp. Fig. 8.42 Photograph of parallel coils on a bus used to reduce coil voltage in heating of moving wire Source: Lindberg Cycle-Dyne, Inc. Fig. 8.43 Photograph of parallel coils interwound to reduce coil voltage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440275
EISBN: 978-1-62708-262-4
... of Carbon Steels , ASM International , 1999 Steel Originated Castings Forgings Furnace Treatments Induction Hardening Fluidized Bed Processing Decarburization is a surface condition that is common to all hot-rolled steel products to some extent. It is produced during heating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050155
EISBN: 978-1-62708-311-9
... traveling at 100 mm/s (4 in./s). Each coil is 50 mm (2 in.) long, and the distance between coils is 100 mm (4 in.). Source: Ref 6 Fig. 7.7 Temperature vs. time plot at the surface and center of an induction-heated, solid bar. Source: Ref 5 Fig. 7.5 Tempering characteristics of four...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310163
EISBN: 978-1-62708-326-3
... temperatures for carbon and alloy steels Table 3 Approximate induction austenitizing temperatures for carbon and alloy steels Carbon content, % Temperature for furnace heating Temperature for induction heating °C °F °C °F 0.30 845–870 1550–1600 900–925 1650–1700 0.35 830–855...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... extensions are shown in Chapter 4, “Induction Coils,” in this Volume under the discussion of “Bus Bars for Power Transmission.” When designing a coil, it is important to visualize the distribution of the eddy currents that cause the workpiece to heat. The objective is to induce current in the area...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... diffusivity are m 2 /s. Thermal stresses are stresses induced in a body as a result of temperature changes. Thermal stresses are important because they can lead to undesirable plastic deformation or even fracture. If a metal bar is heated or cooled uniformly, there are no temperature gradients...