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high-frequency induction welds

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... welding processes. The article also describes failure origins in other welding processes, such as electroslag welds, electrogas welds, flash welds, upset butt welds, flash welds, electron and laser beam weld, and high-frequency induction welds. arc welding brittle fracture electrogas welds...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005583
EISBN: 978-1-62708-174-0
... power sources equipped with induction coils that could be opened for removal from the pipe or tube after the weld was formed. A municipal utility was the first to use mobile high-frequency welding equipment in the streets of New York City for the welding of butt joints in pipe. Pipes as large as 305 mm...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001368
EISBN: 978-1-62708-173-3
... of controlling HF currents, that is, the generation of an edge “V.” High-frequency currents can be supplied to the welding process or workpiece by using either an induction coil (known as high-frequency induction welding, HFIW) or electrical contacts (known as high-frequency resistance welding, HFRW...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005616
EISBN: 978-1-62708-174-0
... a high-frequency signal is considered for a small flaw. Recently, more advanced ultrasonic methods, such as linear phased array and matrix phased array, have been used for weld inspections. Phased array probes consist of multiple transducer elements within a single probe housing that can be...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006477
EISBN: 978-1-62708-190-0
... with film and chemical disposal. However, one of the biggest drawbacks with the radiography method over other NDE methods is the requirement for accessibility to both surfaces of the material to be tested. The ultrasonic method uses high-frequency sound waves to locate and measure flaws in welds...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005846
EISBN: 978-1-62708-167-2
... Continuous High Frequency Welding of Closed Profiles , U.S. Patent Application 20080308550 , Dec , 2008 19. Goldstein R.C. et al. , “Optimizing Axle Scan Hardening Inductors,” 24th Heat Treating Society Conference and Exposition , Detroit , Sept 2007 Induction heating...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005891
EISBN: 978-1-62708-167-2
... Normalized surface power density distribution along the length of a heated bar using different frequencies. Studies (in Ref 1 , 2 , and 6 and the article “Principles of Induction Heating” in this Volume) show that when heating bars fabricated from metals having relatively high values of electrical...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005836
EISBN: 978-1-62708-167-2
... IGBT manufacturer, showing thermal cycling capability for standard (copper) and traction (AlSiC) high-power modules Fig. 26 Five-zone induction forging system Fig. 7 Graph plotting blocking characteristic and high conduction characteristic of a diode Fig. 8 Schematic of a...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006514
EISBN: 978-1-62708-207-5
... Abstract The resistance welding processes commonly employed for joining aluminum are resistance spot welding, resistance seam welding, resistance roll welding, upset and flash welding for butt joining welding, and high-frequency resistance welding. This article discusses the general factors...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005924
EISBN: 978-1-62708-166-5
... Gears with High Frequency , Met. Prog. , July 1943 , p 82 4. Metallurgical Control of Induction Hardening , ASM Trans. , Vol 30 , 1942 , p 516 5. Marten D.L and Wiley F.E. , ASM Trans. , 1945 , p 351 – 404 6. Tudbury C.A. , Basics of Induction Heating...
Book Chapter

By J.F. Libsch
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001387
EISBN: 978-1-62708-173-3
... 5. Libsch J.F. and Capolongo P. , High Frequency Induction Brazing and Soldering , Lepel Rev. , Vol 1 ( No. 5 ) Selected References • Schwartz M.M. , Brazing , ASM International , 1987 Induction brazing is used where relatively high-strength heat-resistant...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005761
EISBN: 978-1-62708-165-8
... Abstract This article commences with a description of the principles of induction heating followed by a discussion on the high temperature electrical, magnetic, and thermal properties of steel, which influence the performance of induction heaters. The importance of eddy current distribution in...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005888
EISBN: 978-1-62708-167-2
... induction billet heating can vary from relatively small values of 8 to 12 to very high values (>100), depending on the magnetic field intensity ( H ) and temperature. To ensure high heating efficiency, minimum required power, low kilowatt losses of the copper, and long coil life, frequency should be...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001400
EISBN: 978-1-62708-173-3
... steels, nickel, etc.). Permeability being the same, materials with higher electrical resistivity heat more efficiently than low-resistivity materials. Therefore, heating efficiency is optimized by joints having metals with large permeability and high electrical resistance as opposed to low-permeability...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005909
EISBN: 978-1-62708-167-2
..., on the power factor or the operating frequency. A metal fin does not change the coupling inductance. Small metal fins or local erosions do not lead to an analyzable change of the electrical parameter. Therefore, such wear conditions cannot be detected; however, such metal fins represent a high...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005533
EISBN: 978-1-62708-197-9
...: Industrial Applications of High Frequency Currents , Vol 15 , 1975 100. Kalantarov P. and Tscheitlin L. , Inductance Calculations , Energoatoizdat , St. Petersburg, Russia , 1986 101. “IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005849
EISBN: 978-1-62708-167-2
... assembly to meet production requirement needs. Fig. 16 Pick-n-place systems Pick-n-place systems are ideal for projects that have limited floor space and short reach points to both the induction heater discharge mechanism and the forging cell. They can operate at high speeds and can be designed...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005835
EISBN: 978-1-62708-167-2
... a zero-reactance circuit to deliver the same amount of active power to the resistive load. In low frequency applications, power factors of induction coils typically have higher values compared with high frequency inductors, but by definition, they are always less than 1 (cos φ <1). Additional...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005870
EISBN: 978-1-62708-167-2
....). Source: Ref 7 Induction-hardened axle shafts consist of a hard, high-strength surface, and a lower-strength tougher core. In addition to substantially improving strength, induction hardening is also very cost effective. This is because most shafts are made in inexpensive, unalloyed medium-carbon...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005903
EISBN: 978-1-62708-167-2
... melting stock are broken through and prevents floating oxide skins from forming on the melt. Both of these processes are reasons for the relatively low occurrence of blisters and the high yield of the metallic aluminum during inductive melting. The temperature difference DTE = TG – T Emin is referred...