0
What are the effects of the electrode polarity on welding in the SAW process?
Wiki User
∙ 11y ago
Think of Polarity as water flow in a pipe. Reverse Polarity means the flow is from the work to the machine. Straight Polarity is flow from the machine to the work. Heat is released when the flow tries to jump the gap. So in Reverse Polarity (where most SMAW is done) the heat builds up in the base metal which is usually thicker than the Electrode. The extra heat there helps melt the base metal. Straight polarity is usually employed when welding thin metals.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What do you mean by awse 6012 welding electrode?
AWS = American Welding Society -- E = Electrode -- 60 = 60,000 lbs tensile strength -- 1 = all position -- 12 (1 and 2 combined ) = DC Reverse Polarity
How do you calculate welding electrode consumption?
how do you calculate welding electrode consumption
When welding the flux on an electrode?
shielded metal are welding is also called
What is difference between welding rod and electrode?
welding rod is used without applying current through it while the other one is, current is passing thru it..i.e. Welding rods are used in TIG welding process while Electrodes (E6011, E6013, E7017..etc..) is used in SMAW process
What is the backing temperature of welding electrode?
350degree
What is polarity in welding?
Polarity in welding has to do with the direction of the current in the welding process. With direct current (DC) the welding circuit can either be straight, or reverse polarity. When the machine is set for straight polarity, the current flows from the electrode to the weld surface and creates considerable heat in the metal. When the machine is in reverse polarity, the current is backwards and is flowing from the metal to the electrode causing a grater concentration of heat at the electrode.
In SMAW Welding Process DCEP and DCRP are same?
yes Electrode Positive is the same as Reverse Polarity
What does en indicate on a welding rod?
The letters EN , on a welding electrode , indicate "electrode negative" , that is the electrode is to be used with a DC current , in the negative position, or polarity.
What is Welding Speed and Welding time for Co2 Welding Process?
Your question is incomplete. Which process? Which electrode? What is the basemetal, which position? etc etc
What do you mean by awse 6012 welding electrode?
AWS = American Welding Society -- E = Electrode -- 60 = 60,000 lbs tensile strength -- 1 = all position -- 12 (1 and 2 combined ) = DC Reverse Polarity
What is reverse polarity in welding?
This is applicable to DC supply Arc Welding.In Layman language, when the electrode is given positive potential and the work piece is given negative potential, the weld formed is shallow and wide, this method is called 'Direct Current Reverse Polarity' (DCRP) welding procedure.When the machine is set on straight polarity, the electrons flow from the electrode to the plate, concentrating most of the heat on the work. With reverse polarity, the flow of electrons is from the plate to the electrode, thus causing a greater concentration of heat at the electrode. Because of this intense heat, the electrode tends to melt off; therefore, direct current reverse polarity (DCRP) requires a larger diameter electrode than direct current straight polarity (DCSP). Notice that DCSP produces a narrow, deep weld. Since the heat is concentrated on the work, the welding process is more rapid and there is less distortion of the base metal. Overall, straight polarity is preferred over reverse polarity because you can achieve better welds. DCRP forms a wide and shallow weld and is rarely used in the GTAW process. The exception to this is when it is used to weld sections of aluminum or magnesium.DCRP has excellent cleaning power that results from the action of positive charged gas ions. When these gas ions strike the metal, they pierce the oxide film and form a path for the welding current to follow. This same cleaning action occurs in the reverse polarity half of an alternating current welding cycle.
An E71T-1 electrode designation is working for which welding process?
Flux core arc welding
What are the application of straight polarity arc welding?
AC (Alternating Current) and DC (Direct Current) is used to describe the polarity of the electric current that the welder generates and in what direction it travels. If you use the wrong polarity for a certain welding rod, your weld strength will not be very good. The general terms associated with polarity are reverse polarity and straight polarity. These are common to the welding trade. Another way to describe the two terms are electrode positive and electrode negative. Electrode positive is the same as reverse polarity. Electrode negative is the same as straight polarity. Hence the + and the - written on your welder where the cables connect to it. Any type of welding rod you buy will be labeled as to what polarity should be used for welding with it. Using the correct polarity will ensure the proper penetration and the over all look of the final bead. If you use the wrong polarity you can tell by the signs. There will be an excessive amount of spatter, you will have bad penetration, and you will have less control of your arc. Some welding machines have a switch to adjust the polarity. If your welder doesn't have one you will need to switch the welding cables around where they plug into the machine. If you want reverse polarity, you need to make sure the electrode holder is plugged into the + terminal. The easiest way to tell if you are using the wrong polarity is by the sound and the feel of the weld you are laying down. If you don't have much experience with stick welding you will have a little more trouble determining the difference. I have seen guys weld all day long with the wrong polarity. Then I would grab their welder to use for couple of minutes and I could tell right away. It all comes down to experience.
What welding process normally feeds the wire or electrode automatically?
MIG
How do you calculate welding electrode consumption?
how do you calculate welding electrode consumption
In which process is the electrode used in welding?
Manual Metal Arc Welding(MMAW) Also GTAW (TIG) and GMAW (MIG) The MIG wire carries electric current so it is considered the electrode. TIG the Tungsten is considered an electrode.
What determines whether polarity of a welding machine is set up for DCEN or DCEP?
The electrode. In some cases thin materials weld better with DCEN.
