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vacuum brazing

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Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005955
EISBN: 978-1-62708-166-5
... successful processing. Vacuum furnaces were first developed for processing of electron tube materials and refractory metals for aerospace applications. They are now also extensively employed in brazing, sintering, heat treating, and diffusion bonding of metals. Heat-treating applications can include...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003210
EISBN: 978-1-62708-199-3
... gases, brazing should be done in a vacuum at a pressure of 10 −5 to 10 −4 torr or in dry inert-gas atmosphere. Filler metal selection in brazing titanium alloys is also critical, because they react with many of the constituents of brazing filler metals to form undesirable intermetallic compounds...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.9781627081733
EISBN: 978-1-62708-173-3
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003831
EISBN: 978-1-62708-183-2
... atmosphere. Thus, most common brazing processes include furnace brazing (with atmospheres of hydrogen, nitrogen, argon, exothermic, endothermic, or dissociated ammonia), vacuum brazing, induction brazing, and torch brazing. The choice of brazing process depends on the base material, part size, part geometry...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003056
EISBN: 978-1-62708-200-6
.... One of the best atmospheres for active brazing is a vacuum. A level of 0.0013 Pa (10 −5 torr) is usually sufficient. A vacuum furnace must also have a low leak rate, less than 0.67 Pa/h (5...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003116
EISBN: 978-1-62708-199-3
... can be used, but furnace brazing is employed more often than any other technique because it permits brazing to be done in a protective environment (usually hydrogen or vacuum) that prevents oxidation of the stainless steel. Most brazing of austenitic types is performed at temperatures in the...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005784
EISBN: 978-1-62708-165-8
... Abstract A wide variety of stop-off technologies for heat treatment are used to selectively prevent the diffusion of carbon and/or nitrogen during atmosphere carburizing, carbonitriding, vacuum carburizing, and various forms of nitriding. In addition to selective stop-off, technologies are also...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006266
EISBN: 978-1-62708-169-6
..., endothermic, dry hydrogen, dry argon, and vacuum. age hardening brazing carbides cast nickel-base alloys diffusion coating directionally solidified castings heat treatment polycrystalline cast superalloys solid-solution hardening solution heat treatment strengthening CAST NICKEL-BASE...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005926
EISBN: 978-1-62708-166-5
...-based atmospheres, industrial gas nitrogen-base atmospheres, argon atmospheres, and hydrogen atmospheres. Atmospheres for backfilling, partial pressure operation, and quenching in vacuum are also discussed. Furnace atmospheres constitute four major groups of safety hazards in heat treating: fire...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003150
EISBN: 978-1-62708-199-3
... cladding, vacuum deposition, and various methods for producing thin films and thick films, are also used in special cases. Additional information on precious metal coatings can be found below and in the Section “Surface Engineering” in this Handbook. A very wide range of silver-based brazing filler...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.9781627081740
EISBN: 978-1-62708-174-0
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003208
EISBN: 978-1-62708-199-3
... vacuum. STUD WELDING is an arc welding process in which the contact surfaces of a stud, or similar fastener, and a workpiece are heated and melted by an arc drawn between them. The stud is then plunged rapidly onto the workpiece to form a weld. Arc initiation, arc time, and plunging are controlled...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003198
EISBN: 978-1-62708-199-3
..., construction, and method of loading. Although originally developed for processing of electron-tube materials and refractory metals for aerospace applications, vacuum furnaces are now employed in brazing, sintering, heat treating, and diffusion bonding of metals. Vacuum furnaces also are used for annealing...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001307
EISBN: 978-1-62708-170-2
... diffusion coating are described in the Section “Vacuum and Controlled-Atmosphere Coating and Surface Modification” in this Volume. Shot peening is currently used to improve the mechanical properties of compressor blades, turbine-blade dovetails, and latter-stage turbine-blade airfoils by introducing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003064
EISBN: 978-1-62708-200-6
... Vacuum- sack, 2-D Autoclave, 2-D Winding, 2-D Weaving, 2.5/3-D Easy Easy Easy Possible Possible Easy Easy Easy Not possible Possible Not possible Possible Possible Easy Possible Not possible Possible Possible Easy Possible Not possible Possible Easy...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003158
EISBN: 978-1-62708-199-3
... or inert 1480 2700 RN Pt 1769 104 S SP 90Pt-10Rh 1850 189 Oxidizing or inert 1480 2700 SN Pt 1769 104 B BP 70Pt-30Rh 1927 190 Oxidizing, vacuum or inert 1700 3100 BN 94Pt-6Rh 1826 175 In conventional thermocouple...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005957
EISBN: 978-1-62708-166-5
... Bluing Bell furnace, pit furnace, roller hearth furnace Nitriding Bell furnace, fluidized-bed furnace, ion furnace, pit furnace, pusher furnace Brazing Humpback furnace, vacuum furnace, conveyor furnace Carburizing Box furnace, car bottom furnace, cloverleaf furnace, conveyor furnace...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001313
EISBN: 978-1-62708-170-2
... (150 °F), with a current density of 5 to 11 A/dm 2 (50 to 110 A/ft 2 ). The nickel-coated tungsten, after heating under vacuum at 450 to 750 °C (840 to 1380 °F) until gas evolution ceases, is cleaned and activated by strike plating in a Wood's nickel bath and then plated as desired. Recent...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003165
EISBN: 978-1-62708-199-3
..., from which it inherits the fine grain size (5 to 15 μm) from the powder processing. Powder consolidation is done by vacuum hot pressing and has also been done by hot isostatic pressing or cold isostatic pressing followed by vacuum sintering. Consolidated beryllium shows only modest ductility (≤3...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003166
EISBN: 978-1-62708-199-3
... applications requiring very high density. Uranium metal is produced by hydrogen reduction of UF 6 to UF 4 , followed by high-temperature reaction of UF 4 with magnesium or calcium to produce uranium derbies. These derbies are vacuum induction remelted, during which alloying elements can be added and...