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Argon Gas
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Here are some more information for Argon Gas:
This process is called by many names and it basically is a welding process that uses an arc to heat metal that needs to be joined. The welder uses a continuous feed filler metal (a consumable) electrode and this is used on the work-piece. This type of welding also must use a shielding that is provided by a gas or a mixture of gasses.
This type of welding is also called short circuit transfer. In the MIG process, when the wire actually touches the metal to be connected, it lets go of the metal that does the welding. This makes sure that metal doesn't transfer across an arc so there is no puddling.
Also known as gas metal arc welding, the MIG(GMAW) process uses a metal gun to provide this service instead of a torch so that you get a direct current going to the metal. You can use both constant current and alternating current systems to also produce this method of welding.
GMAW uses four ways to transfer metal. These are:
Globular - this method is difficult and used the least because it has a tendency to spatter because the gun will move to a high heat without warning. This makes the welding surface come out with flaws. This method uses carbon dioxide so the electrode tends to produce a ball of melted metal that cases irregular shapes that are bigger than the electrode. They then drop and falls onto the piece you are working on which causes a spatter. This is difficult to control as you would imagine.
Short circuiting - this uses a smaller current than the globular method but it still uses carbon dioxide. Because of the lower current you can actually weld thinner metals together with this method. This method is similar to the globular method because drops of melted metal from the electrode still forms, but it causes the electrode to short circuit instead of the drops falling on the work. This closes off the arc but comes back again because the surface tension pulls the metal goblet from the tip.
Spray - this was the first method for transfer used with GMAW and used to weld aluminum and stainless steel. The difference with this process is that the electrode metal passes through an electric arc that is stable and goes all the way to the workplace. This stops spattering and you get a weld finish that is higher quality than in other methods. You also will watch as the current and voltage increases so you get small, vaporized steam droplets instead of large globules.
Pulse spray - this last one is a newer way of doing this type of welding that uses a continuous current that pulses and melts the filler wire. In each pulse a small droplet of metal will fall.
This also allows the welder to use a lower current. The welder gets a more stable arc and this stops spatter and the short circuiting process. Because this process is slower, argon gas is used instead of carbon dioxide as the shielding gas.
Go to WelderWorld 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 to check out our new community site all about Welding and get your free ebook on the basics of Welding at Learn Welding. You can Find Welder World at http://www.welderworld.com
2010 U.s. Industrial Gas Manufacturing Report-Aarkstore Enterprise
The U.S. Industrial Gas Manufacturing Industry report, published annually by Barnes Reports, contains timely and accurate industry statistics, forecasts and demographics. The report features 2010 current and 2011 forecast estimates on the size of the industry (sales, establishments, employment) nationally and for all 50 U.S. States and over 900 metro areas. New to the report this year are: financial ratios, number of firms and payroll estimates. The report also includes industry definition, 5-year historical trends on industry sales, establishments and employment, a breakdown of establishments, sales and employment by employee size of establishment (9 categories), and estimates on up to 10 sub-industries, including carbon dioxide, dry ice, acetylene, helium, argon, neon, oxygen, nitrous oxide, and hydrogen.
Table of Contents :
Users' Guide
Industry Definition and Related Industries
Industry Establishments
Sales and Employment Trends
Financial Ratios
Establishments
Firms and Payroll
Sub-Industries - 2009 Estimated Industry Sales ($Millions)
Sub-Industries - 2009 Estimated Number of Establishments
Sub-Industries - 2009 Estimated Number of Employees
5-Year Trend - Estimated Industry Sales ($Millions)
5-Year Trend - Estimated Number of Establishments
5-Year Trend - Estimated Number of Employees
2010 U.S. Metropolitan Areas - Estimated Number of Establishments
2010 U.S. Metropolitan Areas - Estimated Industry Sales ($Millions)
2010 U.S. Metropolitan Areas - Estimated Number of Employees
2011 U.S. Metropolitan Areas - Estimated Number of Establishments
2011 U.S. Metropolitan Areas - Estimated Industry Sales ($Millions)
2011 U.S. Metropolitan Areas - Estimated Number of Employees
2010 U.S. States - Estimated Number of Establishments
2010 U.S. States - Estimated Industry Sales ($Millions)
2010 U.S. States - Estimated Number of Employees
2011 U.S. States - Estimated Number of Establishments
2011 U.S. States - Estimated Industry Sales ($Millions)
2011 U.S. States - Estimated Number of Employees
Definitions and Terms
For more information please visit:http://www.aarkstore.com/reports/2010-U-S-Industrial-Gas-Manufacturing-Report-37350.html
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About the Author
Aarkstore Enterprise press@aarkstore.com http://www.aarkstore.com
The average kinetic energy of a 1.56 g sample of argon gas in a 5.00 L bulb is 1.24E-20 J/atom?
Can someone explain how to do this please, not just give me answer, thanks
What is the pressure of the gas (in atm)?
What is the average speed (m/s) of the argon atoms under these conditions?
1.56g = 1.56/40 = 0.039moles
E = 1.5kT, T= 1.24*10^-20/(1.5*1.38*10^-23) = 600K
p = nRT/V = 0.039*8.314*600/(5*10^-3) = 38910Pa = 0.384atm
p = 1/3 * N/V * m*v^2
38910*3*5*10^-3 = (0.039)(40/10^3)*v^2
v^2 = 3.714*10^6
v = 1934m/s
Praxair expands its India gas footprint
Praxair Inc. in Danbury deepened its presence in India's with a deal to supply industrial gas to that nation's leading steelmaker.
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