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If you refer to surface purity, very. if there is dirt, oil, rust, paint, even ink, the substance will get into the molten puddle, and weaken the weld. It may also effect the arc current enough to get porosity in the weld (bubbles) and then you are screwed. If you refer to base material purity (i.e. carbon content) Then not much unless you try to weld high carbon to low carbon (i.e. mild steel to cast iron) then you will run into all kinds of problems. heating up high carbon enough will melt low carbon. You may also notice arc fluxuation depending on carbon content.
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What are smaw welding?
smaw welding is sheilded metal arc welding
Why is it important to wear goggles when welding?
It is extremely important to wear goggles when welding in order to prevent any damage to the eyes. Flying pieces of molten metal, chemicals or acids could blind or cause serious damage.
What is arc crater?
Arc crater is the depression in the molten metal created by the end of the welding electrode during the welding of metal.
Why is welding used?
When two pieces of metal are joined by welding they become one as if they were made that way. Welding replaced riveting and reduced the amount of metal used while producing a stronger joint.
What type of welding is when metal is fused together by the heat of a welding flame?
It's called Fusion Welding. You answered your own question.
What are the chief use of acetylene?
The most important use is in metal welding.
What are welding sparks called?
The 'welding sparks' that come off during welding are metal particles from the filler metal, electrode, or base metal that are lost during welding. The standard term is spatter.
What are smaw welding?
smaw welding is sheilded metal arc welding
What is a base metal in welding?
A base metal is also called the Parent metal. It is that metal in the welding practice that has been cut by the various forms of cutting, then prepared and is to be welded. Welding is performed to join one section of the base metal to another section of base metal by means of the various welding processes, e.g. SMAW(Shielded Metal Arc Welding) where welding welding rods are used, GTAW(Gas Tungsten Arc Welding) where Tig wire is used, FCAW(Flux Cored Arc Welding) etc. The welding rods, the TIG wires etc are called the filler metals, for they fill the weld gaps by depositing their molten-state weld metals.
How will you stick metal to another metal?
welding.
What is a welding machine?
metal inert gas (MIG) welding
What is SMAW?
Shielded Metal Arc Welding, known colloquially as "stick".
Why is it important to wear goggles when welding?
It is extremely important to wear goggles when welding in order to prevent any damage to the eyes. Flying pieces of molten metal, chemicals or acids could blind or cause serious damage.
What is a automated welding machine?
metal inert gas (MIG) welding
When welding the flux on an electrode?
shielded metal are welding is also called
What has the author Mike Gellerman written?
Mike Gellerman has written: 'Practical shielded metal arc welding' -- subject(s): Shielded metal arc welding 'Welding fundamentals' -- subject(s): Welding
Explain the principle behind arc welding.?
Arc welding uses an electrical current to create enough heat to melt metal. Any type of welding that uses an electric arc is technically arc welding. However, most people use the term 'arc welding' to mean shielded metal arc welding (SMAW), or 'stick welding'. SMAW, MIG, and flux core wire welding use the filler metal as both electrode and filler; TIG welding uses an electric arc to heat the base metal and a separate filler rod to add metal to the weld.
