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Calcium carbonate is decomposed and the products CO/CO2 form a gas shielding for the weld.
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Why is aluminium hard to weld when exposed to air?
Aluminum is not only hard to weld when exposed to atmospheric air, it is impossible. All aluminum arc welding processes must be shielded from the air. Gmaw (mig) and gtaw (tig) used sheilding gasses such as pure argon or argon mixed with co2 or helium depending on the application. Smaw (stick) process uses a flux to shield the weld. Aluminum is very reactive making it one of the hardest materials to weld. The cleaner the aluminum is the better it will weld. Aluminum must be free of anything that produces hydrocarbons when heated, such as paint, oil and lubricants. Aluminum must be clean and well shielded from the air to achieve a quality weld.
What is butt joint in stainless steel?
there are 3 types of welded joint 1-butt weld butt weld is the type which need usually 4 mm clearance between the 2 edge of pipe or plate you want to weld it. 2-socket weld 3-seal weld
How easily is a hole in the transmission pan fixed and how can you do it?
have someone weld a patch panel on it, or if it is small enough use a product called JB Weld which can be picked up at any autoparts store.
What is the difference between shielded and unshielded welding?
Shielded welding needs a gas to shield the weld from the atmoshere air. Unshielded uses a flux the burns when welding to shield the weld from the atmoshere air.
It is possible aluminium to s.s.316 welding?
how to weld aliminium to ss316
What is a straight weld bead on the surface of a plate with little or no side to side electrode movement called?
A narrow, straight weld bead that is created by moving the SMAW electrode straight along the weld joint. A quality stringer bead should have good tie-in on both sides of the weld.
What is weld log?
A weld log is a Quality Managment tool that acts as a database used to keep an ongoing record of welds made during construction fabrication type projects. The Weld log is used to record Important information recorded as "weld number" Welders Stencils", "Weld Procedure", "Weld Type" Material Type" "Project#" and any other important information to ensure the traceability and Quality Assurance of each welded junction during fabrication or repair activities. The best example can be found here: http://sites.google.com/site/masterweldtracker/
Why is dc welding develop?
we will have straight polarity and reverse polarity,we can produce the weld with good quality
What is weld mapping?
Weld mapping are visible marks that are seen on metal welded parts. Either they are welded together or repaired and sometimes you can tell who welded it, and when the weld was placed. Weld mapping is the process of assigning information to a weld joint to enable easy identification of its design (WPS), production (welders, their qualifications, date welded), quality (visual inspection, NDT) and traceability (heat numbers of materials joined & welding consumables). Weld mapping should also incorporate a pictorial identification to represent the weld number on the fabrication drawing, in case the designer does not nominate a weld number. You can use online weld mapping software such as Smart Welding Manager to create weld maps that provide 100% traceability as well as a pictorial representation.
How close can one weld be to another weld?
Depends on what you are welding, but generaly welds can meet, or even weld on top of a weld.
Who is Theodore Weld?
Theodore Weld
Where is the Weld Public Library in Weld located?
The address of the Weld Public Library is: 25 Church Street, Weld, 04285 0120
Where is the Weld Historical Society in Weld Maine located?
The address of the Weld Historical Society is: Po Box 31, Weld, ME 04285-0031
What welding parameters to consider to produce quality weld?
There are 4 basics to producing a good weld bead. Correct #1 Amperage #2 Electrode Angle #3 Arc Length #4 Travel Speed Factor in electrode manipulation in some cases.
What is the difference between butt weld and socket weld?
A butt weld is a weld made between two straight cut profiles , a socket , or plug weld is made between a surface and a hole.
Can Galvanized strips be welded?
You also need to ensure that the area to be welded is ground clean. This will reduce the vapours released and improve greatly the weld quality.
When was WELD - AM - created?
WELD - AM - was created in 1956.
