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filler-metal flow

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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001345
EISBN: 978-1-62708-173-3
... Abstract This article describes the physical principles of brazing with illustrations and details elements of the brazing process. The elements of brazing process include filler-metal flow, base-metal characteristics, filler-metal characteristics, surface preparation, joint design and clearance...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001452
EISBN: 978-1-62708-173-3
... brazing stainless steel, base-metal inclusions and surface contaminants are even more deleterious than they are when brazing carbon steel. Base-metal inclusions, such as oxides, sulfides, and nitrides, interfere with the flow of filler metal. Flow is also impeded by surface contaminants, which may include...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001392
EISBN: 978-1-62708-173-3
... and brazed without using any additional filler metal in the joint. Clad brazing materials are frequently used as one member of an assembly, in which the mating piece is made from a brazeable alloy, so that the clad filler metal flows by capillarity to the joint area. On a more limited scale, aluminum...
Book Chapter

By Daryl D. Peter
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001388
EISBN: 978-1-62708-173-3
... with this copper-zinc filler metal. Fluxes An adequate fluxing environment is needed to ensure good flow and penetration of the brazing alloy in molten-salt-bath dip brazing. When brazing is done in a neutral flux chloride salt bath, an active flux is usually applied to the assemblies before brazing...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006529
EISBN: 978-1-62708-207-5
..., sheet and tubular form, beverage cans, heat exchangers Readily joined with all procedures, welding, brazing, soldering 4xxx Al-Si 4343 4043 4032 Good flow ability in liquid/solid state, ultimate tensile strength between 175 and 380 MPa Dual uses, primarily for filler metal, some alloys...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001450
EISBN: 978-1-62708-173-3
... of an assembled workpiece, when the filler metal melts, flows, and completely fills the gap between the parts. Because this gap is usually rather small, ranging from approximately 10 to several hundred μm (0.4 to ∼10 mils), the degree to which a molten alloy penetrates into the gap is primarily determined...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001451
EISBN: 978-1-62708-173-3
... to allow the flow of filler metal. The ideal gap, when brazing with the BAg series of materials, is approximately 0.050 to 0.127 mm (0.002 to 0.005 in.). Coefficients of thermal expansion for selected materials Table 2 Coefficients of thermal expansion for selected materials Values represent high...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005856
EISBN: 978-1-62708-167-2
..., combined with an appropriate joint gap between the parts in which the filler metal will flow, is where the majority of the brazed joint strength is derived. Fig. 2 Filler metal ( A ) dissolves and reacts with the base metal ( B ), forming a thin layer called the joint interface ( AB...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006302
EISBN: 978-1-62708-179-5
... and to those of the solid. Filler metal flow also is influenced by dynamic considerations involving fluidity, viscosity, vapor pressure, gravity, and, especially, by the effects of any metallurgical reactions between the filler metal and the base metal. Other significant factors that also must be considered...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001390
EISBN: 978-1-62708-173-3
... Abstract Diffusion brazing (DFB) is a process that coalesces, or joins, metals by heating them to a suitable brazing temperature at which either a preplaced filler metal will melt and flow by capillary attraction or a liquid phase will form in situ between one faying surface and another...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001453
EISBN: 978-1-62708-173-3
... wetting and flow are not classified by AWS but are also available. These filler metals have been developed to replace gold-containing (BAu) brazing filler metals, which are more expensive. Another group of brazing filler metals not classified by AWS are used for repair and overhaul of nickel...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006828
EISBN: 978-1-62708-329-4
... alloying or intergranular penetration. On the other hand, temperatures that are too low can cause incomplete flow of the filler metal into the joint and inadequate wetting of the base metal. The heating rate is also important, especially if the filler metal melts over a wide temperature range. In this case...
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
... assembly as it proceeds through furnace brazing operation. Filler metal wire (filler metal encircled by flux) gradually melts and flows into voids between the three sections and then cools to form a single-unit workpiece as it is conveyed through the furnace. Furnace brazing requires the use...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001389
EISBN: 978-1-62708-173-3
... more critical because the workpieces are heated only by conduction from the electrode surfaces. Because molten braze filler metal tends to flow to the hottest region in the joint, uniform heating is vitally important in achieving a uniform brazed joint. Therefore, it is necessary that the shape...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001454
EISBN: 978-1-62708-173-3
... series, which may contain zinc, cadmium, or nickel. High-copper-content or copper alloys that contain metals that are more refractory, such as chromium or zirconium, will form oxide films that slow or prevent the flow of the brazing filler metal. Under these conditions, cleaning operations are often...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006692
EISBN: 978-1-62708-210-5
... suited to applications in which limited flow is desired. AWS BAlSi-4: This is a general-purpose brazing filler metal. It is used with all brazing processes requiring a free-flowing filler metal and good corrosion resistance. AWS BAlSi-5: Filler-metal AWS BAlSi-5 is used for furnace and dip...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001394
EISBN: 978-1-62708-173-3
... to be soldered. This may require directing the torch to a larger mass component of an assembly. Because the filler metal will flow to the hottest portion of an assembly, the flame should be applied so that the filler metal will flow in the intended direction. Also, movement of the torch is required to avoid...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001344
EISBN: 978-1-62708-173-3
.... As a rule, the HAZ produced during brazing is wider and less sharply defined than those resulting from other fusion-related processes. Several elements of the brazing process must be understood in order to produce satisfactory brazed joints: Filler metal flow Base metal characteristics...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001467
EISBN: 978-1-62708-173-3
... of nickel to prevent oxidation of these elements during the brazing cycle. If oxidation occurs, then the flow of the brazing filler metals is inhibited. Brazing filler metals that are rich in silicon and lean in boron are preferred to avoid erosion of the ODS base metals during the brazing cycle...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001492
EISBN: 978-1-62708-173-3
...) For a lap length of ⩽6.35 mm (⩽ 1 4 in.). (c) For a lap length of >6.35 mm (> 1 4 in.) Fig. 8 Effect of the chemical composition of a binary alloy on alloy viscosity. Source: Ref 2 Joint design also affects filler metal flow. Figure 9 shows two different...