what is better mig welding or tig welding?
812948
For certain type of work TIG is required, like welding chrome moly for some racing organizations. Intricate work, like gunsmithing is also well suited to TIG. TIG is used by many auto restorers who prefer a more precise, perfect finish that requires little to no finish work.   TIG is most similar to gas welding in technique, so if you've done oxy-fuel welding, TIG should be a natural transition. \n\nIf you are looking to weld professionally Start with Mig and Tig then is a much easier task to perform\n\nMIG is required by law and by insurance companies in many localities for structural repair of automotive frames. MIG is also much easier to learn and faster to weld.  For doing other types of welding,   like sheet metal, it can be a matter of personal preference. For an auto body repair shop or a novice welder, a MIG is a good, practical all-around welder.
795422
It depends on the torch.  The small toches you buy in a hardware store usually use propane.  Some use MAPP (methylacetylenepropadiene) gas, which produces a hotter flame.  Both of those use oxygen from the air to burn the gas.  Propane torches are used for soldering and general heating.  If MAPP gas is used, brazing ("hard" soldering) can also be done.  If you want to weld, ie, join metals by fusing them together, an oxy-acetylene torch is used.  It has two tanks, one for O2 and one for C2H2.  Also, for welding aluminum, hydrogen is often used instead of acetylene, because it produces a somewhat lower temperature better suited to lower melting point of that metal.  You can also get little torches (at places like Radio Shack) that use butane, and are filled from the kind of cannisters that are used to fill butane lighters.  These torches are mainly used for soldering.  There are two types of torches I've seen that are worth mentioning, but which are very uncommon today.  There's the classic "blow-torch," which uses gasoline.  You pump them up, just like you do with a Coleman stove.  Then there's a little torch that used to be pretty popular, that ran on alcohol.  It had two small cylinders. One was equipped with a tube and nozzle, which were fed with alcohol.  The other held a wick soaked in alcohol, which heated up the tube, and vaporized the fuel.  These torches didn't produce a very high temperature, but were useful for soldering.
122633
http://images.google.com/images?complete=1&q=tigger&hl=en
768677
Gallium based semi-conductor right now is too expensive to deploy. \n\nIf you want completely out of the left field, I'd go for optical processing.
929944
Nickel is harder than copper and provides better penetration into the target. Copper is softer and tends to mushroom much faster once it enters its target. \nIf you want penetration go for the nickel\nIf you want displacement go for the copper
135823
The three types of welding are 1. Electrode welding, which uses a coated metal filler rod to add metal to the weld puddle; the welding job determines the setting of welder amperage and the type and size of electrode used 2. MIG welding (Metal Inert Gas), also known as wire-feed welding, which is a semi-automatic process and the easiest of the three to learn; it uses an inert gas for shielding 3. TIG welding (Tungsten Inert Gas), also known as heliarc welding, which uses a tungsten electrode shielded by inert gas. TIG is slower than MIG and is more precise, which is why it is used for thinner and more exotic metals.
17626
If you are thinking about welding ... forget it! Cast iron does not weld. A highly skilled person can braze cast iron together but the high heat can distort the iron and can be expensive. And you still have the appearance of the raised braze bead to deal with if it is on an outside surface.\n\nI recommend "gluing" cast iron together. A good product to use is called J-B Weld. It is a two part epoxy adhesive that comes in small squeeze tubes. Follow directions on the package. This stuff does not make a good filler material because it is somewhat runny before it sets up.
906323
Grainger\nMotion Industries
1185920
http://www.acp-composites.com/acp-tube.htm\nhttp://www.macqc.com/\n\nCarbon fiber is stronger than steel pound for pound, but it's much more expensive and it's not as stiff. (It bends like a willow before failing).\n\nYou CANNOT weld carbon tube! It WILL burn! If you need to fasten, your best bet is to use some kind of welded flange system like on racing bikes.
1016301
G's the newer one, I've used both and found G to be far superior.
836869
First, here is a back drop of info to help you determine wether brazing or soldering will be msot effective for you. \n\nBrazing use molten metal to join two pieces of metal, yes. However, the metal added during the process has a melting point lower than that of the workpiece, so only the added metal is melted, not the workpiece. \n\nSoldering uses metals with a melting point below 800 degrees Fahrenheit; brazing uses metals with a higher melting point. Because soldering and brazing do not melt the workpiece, these processes normally do not create the distortions or weaknesses in the workpiece that can occur with welding. \n\nSoldering commonly is used to join electrical, electronic, and other small metal parts. Brazing produces a stronger joint than does soldering, and often is used to join metals other than steel, such as brass. Brazing can also be used to apply coatings to parts to reduce wear and protect against corrosion.\n\nI recommend copper or aluminum for your small project.
286829
Soldering is when you heat a base material expand the surface atoms and introduce a substance [solder] that will mesh between the two. When this cools the base material will shrink around the solder and the two material will be bound to each other. Welding is when you heat two pieces of material to their melting point and the materials essentialy "mix" together. When they cool, you have essentialy one peice of material.
399593
Look into a product called Alumaloy. It's like welding that you can do with an ordinary propane torch. They claim its stronger than steel and will bond to any kind of metal.
430657
Need to learn to weld.  I'd say go buy one for the $700-$800.
791834
Because when you braze you are bonding the two metals together with the brazeing rod (sort of like glueing it) but with arc or gas weld you are melting the two metals together by forming a pool of molten metal and if they are not the same type of metal they will not melt together and form a bond
234323
that is true.  if you dont like that then get a responase trigger kit.  it uses excess co2 to power the trigger and gets faster than the egrip.  plus it is cheaper
691119
Follow the same safety rules for welding stainless as for welding anything else.  You don't say if you are arc-welding, gas-welding or MIG- or TIG-welding, but you shouldn't be breathing the fumes whatever method you are using. The most toxic gases are likely to come from impurities in the metals you are welding rather than the welding gases themselves.\n\nShame on your new employer for assuming you had the appropriate safety training, or shame on you for giving the impression you did!