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high-frequency welding

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
...Abstract Abstract This chapter discusses the fusion welding processes, namely oxyfuel gas welding, oxyacetylene braze welding, stud welding (stud arc welding and capacitor discharge stud welding), high-frequency welding, electron beam welding, laser beam welding, hybrid laser arc welding...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220315
EISBN: 978-1-62708-341-6
... Welding The use of high-frequency induction and resistance heating for tube welding also appears very attractive from a cost viewpoint. Not only is the cost per unit of product considerably less with these techniques than with submerged-arc welding (SAW) and fluxed-cored arc welding (FCAW...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220085
EISBN: 978-1-62708-341-6
... 0.041 0.020 (a) 1 in. = 25.4 mm. Fig. 6.1 Relationship between diameter of round steel bars and minimum generator frequency for efficient austenitizing using induction heating. From F. W. Curtis, High Frequency Induction Heating , McGraw-Hill, New York. 1950 ( Ref 3 ) When...
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
... Review , Vol 1, No. 5, p 1 ( Ref 9 ) Materials Handling in other Induction Heating Processes Two other induction heating processes in which material handling plays an important role are welding and melting. The fabrication of high-frequency induction welded tubing has been discussed in Chapter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500211
EISBN: 978-1-62708-317-1
... for slow lines, whereas high-frequency welding is a costly but fast alternative for bonding operations. In addition to these two types, laser, plasma, and induction welding, and soldering and brazing techniques can be incorporated within roll forming lines. Cut-off machines are needed in postcut-type...
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
...., aluminum and copper alloys). Advantages specific to induction melting as compared with other melting processes include a natural stirring action (giving a more uniform melt) and long crucible life. Welding, Brazing, and Soldering High-frequency induction welding offers substantial energy savings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720345
EISBN: 978-1-62708-305-8
... will not detect flaws shorter than 6.4 mm (┬╝ in.), which will not satisfy the inspection requirements for most resistance welded pipe. A disadvantage of the ultrasonic method in tube inspection is its high sensitivity to minor scratches and to elongated dimensional changes, such as the ridge left when...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
...Abstract Abstract Ultrasonic inspection is a nondestructive method in which beams of high frequency acoustic energy are introduced into a material to detect surface and subsurface flaws, to measure the thickness of the material, and to measure the distance to a flaw. This chapter begins...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090359
EISBN: 978-1-62708-266-2
... characteristics of the reflected wave form was of prime concern. The small size and tightness of the cracks in the BWR piping suggested that they could best be detected using relatively high frequencies. However, investigation proved otherwise. Frequency spectrum analysis of the reflected ultrasonic pulse...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... be soldered or brazed together. Intricate assemblies can be produced with low distortion, high fatigue resistance, and good resistance to thermal shock. Joints tend to be strong if well filled, unless embrittling phases are produced by reaction between the filler metal and the components. Soldered...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
...-frequency low-amplitude stresses are developed on account of vibrations due to irregular flow of flue gases or soot blowers, whereas low-frequency high-amplitude stresses are attributed to boiler cycling. Defective tube-to-tube welds or tube-to-manifold welds that are subjected to vibrations on account...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
.... Workpieces that have irregular test surfaces may need to be cross-sectioned so that the surface hardness can be tested just beneath the surface on the cut cross section. Ultrasonic inspection involves introducing a beam of high-frequency sounds into the material being inspected to detect surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... on steels where maximum hardness and minimum crack susceptibility are required. Although the rate of deposition is not as high as for other processes, oxyacetylene welding has the advantage of minimizing undesirable base metal dilution and loss of hardness of the hard-facing alloy. The absence of a steep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... be detected by eddy current inspection at high speed and at low cost. Some of the discontinuities that are readily detected are seams, laps, cracks, slivers, scabs, pits, slugs, open welds, miswelds, misaligned welds, black and gray oxide weld penetrators, pinholes, hook cracks, and surface cracks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820203
EISBN: 978-1-62708-339-3
... of using sensitized coupons is that, if corrosion occurs, they indicate a potential problem. The user is thus obliged to consider how the equipment will be welded and heat treated and to determine whether high-temperature excursions will occur during operation. Stress-Corrosion Coupons Typical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... and temper embrittlement Transverse cracks High-cycle fatigue with or without corrosion assistance Retire; weld repair Need to develop materials with improved pitting resistance; improve design to minimize stress concentration; reduce da/dn; coatings HP/IP rotor Radial-axial bore cracks Creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
..., corrosion fatigue cracking of high-strength steel exposed to a hydrogen-producing gas, such as water vapor, may be difficult to differentiate from some other forms of hydrogen damage. At sufficiently high frequencies, the fracture surface features produced by corrosion fatigue crack initiation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940271
EISBN: 978-1-62708-302-7
... range for Ti-6Al-4V alloy in air and in 0.6 M NaCl at indicated frequencies and R = 0.1. Source: Ref 170 Fig. 7.125 Corrosion-fatigue-crack-growth rate as a function of stress-intensity range for a high-strength aluminum alloy in dry argon and indicated halide solutions. Source: Ref 173...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
... Welding High-Frequency Induction Welding Thermal Cutting Soldering and Brazing Safety Nondestructive Evaluation (NDE) Recent Developments New Developments Austenitic stainless steels are readily welded by nearly all welding techniques. The characteristics of austenitic stainless...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... welds. High-frequency vibrations, introduced into the areas to be joined, disrupt the metal atoms at the interface of the weld components and produce an interlocking of these atoms to achieve a mechanical joint. No significant heating is involved; the maximum temperature at the weld interface is usually...