This document discusses brazing, braze welding, and soldering processes. Brazing uses filler metals that melt above 840°F and relies on capillary action to draw the filler into the joint. It requires clean surfaces, the correct flux, and heating above the filler metal's melting point. Braze welding is similar but forms a visible bead instead of relying on capillary action. Both produce stronger joints than soldering, which uses filler metals below 840°F. Key requirements for brazing and braze welding include cleaning the joint area, using the proper filler and flux, and carefully controlling heat to melt the filler without burning the flux.
this ppt pdf beneficial for 1st year engineering student who studying workshop technology. in this pdf types of joining, gas welding, arc welding, spot welding, tig welding, mig welding, soldering brazing and different welding defect has been discussed.
Forging is the operation where the metal is heated and then a force is applied to manipulates the metals in such a way that the required final shape is obtained.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
One of the welding processes that used in Engineering field is the brazing. Soldering is similar to the brazing but there are several differences.
Thanks for the colleagues who give this slides to publish.
Conventional processes- Explosive forming, electro-hydraulic
forming, magnetic pulse forming – Principles and process
parameters- Advantages- Limitations and Applications
this ppt pdf beneficial for 1st year engineering student who studying workshop technology. in this pdf types of joining, gas welding, arc welding, spot welding, tig welding, mig welding, soldering brazing and different welding defect has been discussed.
Forging is the operation where the metal is heated and then a force is applied to manipulates the metals in such a way that the required final shape is obtained.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
One of the welding processes that used in Engineering field is the brazing. Soldering is similar to the brazing but there are several differences.
Thanks for the colleagues who give this slides to publish.
Conventional processes- Explosive forming, electro-hydraulic
forming, magnetic pulse forming – Principles and process
parameters- Advantages- Limitations and Applications
the making of articles on a large scale using machinery; industrial production. "even in manufacturing they no longer dominate"Manufacturing is the process of turning raw materials or parts into finished goods through the use of tools, human labor, machinery, and chemical processing. Most products were handmade using human labor and basic tools before the Industrial Revolution.
What are the 4 types of manufacturing process?
Casting and molding.
Machining.
Joining.
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مشروع مجموعة
رشاد أمان عثمان
احنا اتكلمنا عن اللحام للالمونيوم بوجه الخصوص عن
Soldering and brazing of Aluminum
وحاولنا ان نستعرض المعلومات الكافية عنهم
من خلال طريقة اللحام والمشاكل التي تواجه هذه الطريقة
واهم التطبيقات
اتمني الاستفادة
Soldering and Brazing are an integral part of dentistry, especially in prosthodontics and crown and bridge procedure. it is also used in implant-supported prosthetics.
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Marvin neemt je in deze presentatie mee in de voordelen van non-endemic advertising op retail media netwerken. Hij brengt ook de uitdagingen in beeld die de markt op dit moment heeft op het gebied van retail media voor niet-leveranciers.
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2. Introduction
• Three common processes:
Soldering
Brazing
Braze welding
2
3. Non-fusion welding Advantages & Disadvantages
• Advantages • Disadvantages
Lower temperature Lower tensile strength
Easy assembly Not efficient method for
Weld dissimilar metals thick metal
Allows disassembly/realignment Not efficient method for
Join metals of different large parts.
thicknesses
Joint different types of metal
3
4. Four Requirements of Brazing
• Clean metal
• Appropriate filler rod
• Correct flux
• Heat
4
5. 1. Clean Metal
• Molecular bonding requires a clean surface.
• Requires a clean surface not a polished surface.
Clean
Polished
• Best method is to grind the surface
5
6. 2. Appropriate Filler Rod
• Filler rods are available for many
non-fusion processes.
• Brazing: (Figure 24-2, pg 314)
Brazing rod are available as bare
rods or flux coated.
• Soldering: (Figure 24-1, pg 314)
Solder can be solid or flux core.
Flux core can be acid or resin.
Can be tin, silver or zinc alloy.
6
7. 3. Flux
• Flux must be used with all non-fusion
welding processes.
• Three purposes of flux.
1. Chemically clean the metal
2. Shield from oxidation and
atmospheric contamination
3. Promote wetting
• Flux must be appropriate for the
metal and filler material.
• Flux is available in three (3) forms.
1. Paste
2. Powder
3. Liquid
7
8. 4. Heat
• Sufficient heat must be available to raise the base metal
temperature above the melting point of the filler rod.
• The decision on heat source to use is based on the mass of
metal that must be heated, the welding process and the
availability of equipment.
8
9. Non fusion Heat Sources
Oxyacetylene
Air acetylene
Air propane
Oxypropane
MAPP
Electric soldering iron
Electric soldering gun
9
10. Tinning
• Tinning is the process of applying
a thin layer of filler rod to the
surface of the metal.
• When soldering sheet metal
joint/seams, both surfaces are
usually tinned before assembling
the joint/seam.
• Makes it easier to get the filler material to fill the joint and bond the
metals together.
10
11. Controlling Heat
• Metals are excellent conductors of heat
Heat applied to joint moves away from the joint.
The greater the mass of metal that must be heated--the greater the
heat requirement.
• Excessive heat will cause the flux to burn.
Contaminates the joint.
Joint must be re cleaned
• Manipulation of the heat source may necessary to heat both
pieces evenly.
11
12. Soldering
• A process that uses a metal alloy that melts below 840 oF.
• May or may not use capillary action.
Capillary action (wicking) is the ability of a substance to draw another
substance into it.
• Solder is divided into
two categories;
Soft
Hard
• Soft soldering
Lead or lead replacement solder
Lower tensile strength Additional information in
Copper pipe and sheet metal pages 170-172
Stained glass
• Hard soldering
Silver based solders
Jewelry
12
14. Brazing
• A process that uses a metal alloy that melts above 840 oF, but
less than the melting point of the base metal.
• Brazing relies on capillary action to draw the filler metal into the
joint or to keep it in the joint.
The capillary effect is a function of the ability of the liquid to wet a
particular material.
Requires very small gap between metal surfaces, clean surfaces
and flux.
14
15. Brazing Process
1. The joint area is mechanically cleaned and fluxed
Flux can be applied before the joint is assembled, or during the
brazing process.
2. The joint is assembled.
May require clamping.
• A heat source is used to raise the temperature of the base
metal above the melting of the filler metal (>840 oF).
Must insure the joint is not overheated.
If this occurs the flux will burn and contaminate the joint.
When the joint becomes contaminated it must be recleaned and
refluxed before the welding can continue.
4. The filler metal is added to the joint.
5. The filler metal flows into the joint and adheres to the surfaces.
6. The heat source is removed and the filler metal solidifies,
bonding the surfaces together.
15
16. Brazing Joints
• The strength of a brazed joint is less than a fusion welded joint.
• Joints should be modified to the maximum welded area.
Tensile strength of
brazing rod is
~40,000 psi.
Tensile strength of
steel electrode is
36,000 to 50,000
psi.
16
17. Process:
Braze welding
1. The joint area is cleaned and fluxed.
2. A heat source is used to raise the
• A process that uses a temperature of the base metal to the
metal alloy that melts melting temperature of the filler
above 840 oF, but less metal.
than the melding point of If excessive heat is added to the
the base metal. joint, the flux will burn.
• Braze welding is the When this occurs the process
same process as brazing must start over.
except it does not use
capillary action and a 3. The filler metal is added to the joint.
visible bead is formed. 4. The filler metal adheres to both
surfaces forming a bead.
The puddle must be heated until
the key hole collapses.
• The heat source is removed and the
filler metal solidifies, bonding the
surfaces together.
17
18. Braze Welding
Key Hole
• When the brazing rod is
melted in the puddle, it will
bridge across at first--form a
key hole
• Sufficient heat must be added
to cause the key hole to
collapse.
• Failure to collapse the key
hole will result in a joint that
has incomplete penetration.
18
19. Braze Welding
Joints
The five (5) standard joints
can be used for braze
welding. Butt
Lap
Edge
Corner
T
19