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magnetic flux concentrators

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
... for induction heating and quenching, the use of magnetic flux concentrators to improve the efficiency of surface heating, and the quenching systems used for induction hardening. The discussion also provides information on time-temperature dependence in induction heating, workpiece distortion in induction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... Abstract This appendix provides practical information on induction coils and how they are made. It discusses soldering methods, preferred materials, design challenges, and best practices and procedures. It also discusses the design, construction, and application of magnetic flux concentrators...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220241
EISBN: 978-1-62708-341-6
... of the magnetic field in which they are placed. Above the Curie temperature, however, they lose their ferromagnetic properties, and their relative magnetic permeability drops to unity. Flux concentrators are magnetic materials which are utilized to gather the flux field set up during induction heating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050293
EISBN: 978-1-62708-311-9
..., particularly the coils that are used on lower power densities and those without magnetic flux concentrators. If any leaks develop, the coils should be removed from production, cleaned, and repaired. Common coil problems are: Arcing: Arcing may occur due to the coil coming in contact...
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
.... , Magnetic Flux Concentrators , Met. Heat Treat. , March / April 1995 7. Rufini R.S. et al. , Advanced Design of Induction Heat Treating Coils , Ind. Heat. , Nov 1998 8. Learman T. , Formable and Thermal Hardenable Concentrator Enhances Induction Heating Process , Ind...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... Abstract Liquid penetrant, magnetic particle, and eddy current inspection are used to detect surface flaws. This chapter is a detailed account of the physical principles, process description, equipment requirements, selection criteria, advantages, limitations, and applications of these surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220185
EISBN: 978-1-62708-341-6
.... 8.8 Schematic illustration of induction-coil design for surface hardening of trunnion cups Because magnetic flux tends to concentrate toward the center of the length of a solenoid work coil, the heating rate produced in this area is generally greater than that produced toward the ends...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000131
EISBN: 978-1-62708-312-6
..., it must have 4π lines of force passing through it. If the pole strength is p , 4π p lines of force will be produced from it. In vacuum, the magnetic flux density, B , is directly proportional to the magnetic field intensity, H , and may be represented by the equation: (Eq 8.2) B = μ 0...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... by imaging the solid bar to consist of a number of thin, concentric sleeves ( Fig. 2.5 ). The field of magnetic induction is strongest in the space between the inner diameter of the coil and the outer diameter of the outermost sleeve. A certain amount of flux passes through the outermost sleeve, inducing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... magnetic induction, or flux density, or simply induction and is expressed by the symbol B . Therefore, the magnetic induction B is the sum of the applied field H and the external field that arises from the bar inside the solenoid. The induced magnetic moment per unit volume due to the bar is called...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050215
EISBN: 978-1-62708-311-9
.... There are many other types of mechanical handling devices of which the only limit is ingenuity. Anything that has the ability to move parts into the coil without being affected itself by the magnetic flux field of the coil can be used. Examples or other types are trap fixtures, bowl feeders, conveyors, rotating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130521
EISBN: 978-1-62708-284-6
... square meter W/m 2 Luminance candela per square meter cd/m 2 Luminous flux lumen lm Magnetic field strength ampere per meter A/m Magnetic flux weber Wb Magnetic flux density tesla T Molar energy joul per mole J/mol Molar entropy joule per mole kelvin J/mol · K...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
... is restricted to localized areas or surface zones immediately adjacent to the coil. This is because the alternating current (ac) in an induction coil has an invisible force field (electromagnetic, or flux) around it. When the induction coil is placed next to or around a workpiece, the lines of force concentrate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... of nondestructive inspection of weldments including visual inspection, liquid penetrant inspection, magnetic particle inspection, radiographic inspection, ultrasonic inspection, leak testing, and eddy current and electric current perturbation inspection. The chapter also describes the properties of brazing filler...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110111
EISBN: 978-1-62708-247-1
... to oppositely directed flux and white corresponds to B z = 0. This magnetic field data is typically processed using a standard inversion technique [12 , 13] to obtain a current density distribution map. An example of acquired magnetic data and the corresponding computed current density is shown...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... particles selected are nonfluorescent and suspended in a liquid vehicle. The magnetizing equipment is capable of inducing a magnetic flux of suitable intensity in the desired direction by both the circular and the longitudinal methods. Direct current from generators, storage batteries, or rectifiers is used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220085
EISBN: 978-1-62708-341-6
... 6.2 also shows the effect of coupling (distance between the coil inner diameter and workpiece outer diameter). As this distance increases (i.e., as the coupling diminishes), the efficiency is lowered. This trend is related to the fact that fewer lines of magnetic flux pass through the workpiece...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170614
EISBN: 978-1-62708-297-6
...-current loss from electric currents induced by flux changes High magnetic permeability and sometimes constant permeability at low field strengths High magnetic saturation induction Minimum or definite change in permeability with temperature in special applications Cost, availability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... corrosion of the heat-affected zone (HAZ) or weld metal, or it can be associated with geometrical aspects, such as stress concentration at the weld toe, or creation of crevices due to joint design. Additionally, specific environmental conditions can induce localized corrosion such as temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... ) flux compositions. During welding, the base metal, HAZ, and underlying weld passes experience stresses due to thermal expansion and contraction. On solidification, high levels of residual stress, often close to the material yield stress, remain as a result of weld shrinkage. Stress-concentration...