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Tig Plasma
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Here are some more information for Tig Plasma:
Copper alloys and copper are often used in many environments where manufacturing is done. It is a material that resists corrosion, can be easily fabricated, is strong and resists fatigue. Also, it has both thermal and electrical conductivity.
Copper is a metal that is also resistant to sparks, has a distinctive color and is resistant to wear when it is used with other metals. Arc welding uses a lot of copper in most of the various types of arc welding including gas metal, plasma or submerged arc welding. Copper also uses a shielding gases in some of the arc welding processes and it is usually either argon, helium or a mixture of the two.
When copper is welded in order to have a complete fusion of the metals, the arc's intensity will be important. It has to have base metal that is highly conductive and a narrow HAZ. This very important if the copper has been hardened by precipitation.
When you need to weld copper that has less than 3mm in thickness, it is recommended to use gas metal arc. This can also be used to join bronzes of aluminum or silicon and allows that are comprised of copper and nickel.
The use of plasma welding for cooper is also done and helium, argon and mixtures of these two gases are used. There is a caution though that you should never use hydrogen gas to weld copper.
In order to produce different copper allows, there are other metals that are alloyed with it. Usually these metals include nickel, tin, zinc, aluminum or silicon. There are other smaller bits of metals that are used to encourage the copper to be resistant to corrosion or to be able to be used with a machine.
Sometimes welders find that their copper welds don't take and this can be largely due to several different issues:
Thermal conductivity -- it is important to make sure that any shielding gas that is used and the type of current is hot enough to provide enough heat to the joint you are welding. If you have copper allows that have a low thermal conductivity, you may need to preheat the joint.
Position for welding -- copper is a very fluid alloy so it has to be welded in a flat position. Otherwise it is going to run all over. In some cases like fillet welding in T-joints or comer joints, a horizontal position can be used.
Hot Cracking -- copper and its allows is susceptible to this experience when they are coming back to a solid state. This can happen especially with copper/tin or copper/nickel alloys. You can minimize this if you reduce the restraint when you are welding and preheat the metal to slow don the rate of cooling.
Problems with porosity -- this challenge can happen when you have zinc, cadmium or phosphorous as part of the copper alloys mix. They have low points of boiling and have a tendency to vaporize. It is a good idea to have a higher speed of welding and a filler metal that has a small amount of these other metals in it.
Go to WelderWorld.Com to get your free ebook on Welding at Welding. Welder World also has a Welder Forum where you can discuss welding with other welders and get tips for welding or showcase your welding work. Come to WelderWorld.com to check out our new community site all about Welding and get your free ebook on the basics of Welding at Learn Welding.
Plasma Cutting Tips for Successful Plasma Cutting
There are many ways to weld and when you need high heat plasma cutting is your best way to do it. You will find that plasma and the plasma arc process has been refined so you can get a better quality cut at higher speeds with a lower cost. You can also find that gouging and piercing will go a lot smoother.
Generally speaking plasma cutting is a simple technique to learn though the process seems complicated. Plasma cutting is also safer than using oxyfuel because there are no flashbacks or dangers from flammable gas like there is in oxyfuel gas cutting.
When you have a metal that you want to cut and it is a good electrical conductor, plasma cutting is the best way cut it.
How To Set Up the Plasma Cutter for the Best Cut
When you first start the cut the torch should be as close as you can get it to the base metal’s edge. Next press the trigger so you can start the pre-flow air and light the pilot arc. When you see that the cutting has started, control the torch so that it moves slowly across your project. You may need to adjust the speed to keep the sparks under the bottom of the metal. Watch the metal because if you do not see sparks under the bottom then you are not getting through the metal. If this is the case, slow down your movement and check the amperage of the plasma stream; make sure that you are holding it at an angle.
As you are finishing the cut, put the torch at a slight angle or pause it so that it will automatically finish the cut.
How To Make A Perfect Gouge
To do this you should place the torch at a 40 degree angle to the base metal. As you see the cutting arc igniting, make your arc a short distance from your work. You may have to adjust the length of the arc and the travel speed so that you are able to control the gouge. You do not want to cut it too deeply at first because you may have to do more than one pass if you are attempting to go through thick metal.
Plasma cutting is a skill that needs to be practiced just like any other welding technique. With these tips you may find that your practice goes smoother.
About the Author
Brayan Peter is an expert author for Welding Equipment, Welding Supply. He written many articles like Plasma Cutter, TIG Welding Equipment, welding helmets Diesel Generators. For more information visit our site everlastgenerators.com. Contact him at weldings.info@gmail.com
Question about becoming a certified welder?
Someone (a some what unreliable source) was trying to tell me that you can get certified in each different arc welding rod. Is this true? I thought a certification meant that you can run all the arc welding rods, a tig welder, a mig welder, gas welder, a cutting torch, a plasma cutter, etc.
Also a few years ago I took a welding test that I didn't pass. The test was 2 v groove butt joint 7018 welds. One was a vertical weld, and one was an overhead. What would I have received If I had passed this test? Would I have received any kind of certification, or just college credit I could use toward a certification?
Thanks for any comments
The AWS certification book is literally a few hundred pages. You certification is based on the type of joint, the weld position, the welding type, the filler metal type, the metal thickness, and a few other criteria I probably forgot. For instance, you a 4G weld using solid wire on 1/4" v-groove plate will not transfer over to 4G welding on 1/4" v-grooved plate using duel shield. There is also a huge difference between using a backing plate and not using a backing plate. Basically, you want to look at getting a D1.1 certification for a general certification in the type/style/metal thickness/position then get the specialized certifications after you get hired by a company.
If you had passed the test then you would have gotten SWAM certification on a 3G and 4G weld on whatever thickness material metal you were working on. I can't say for sure if the rod type would matter, but I would like to say probably not. You would need to verify it with the AWS. Certification testing is certification testing. It is completely an AWS thing where you would get a profession certificate, but it would in no way affect your college credit unless the college wanted to count it for something.
Shuttle to streak across America during re-entry
The Discovery astronauts tested the shuttle's re-entry systems Sunday and packed up for landing Monday at the Kennedy Space Center, weather permitting, to close out a space station resupply mission with a fiery dawn plunge across the heartland of America.
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