Etica ingeniería

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Resistances of the Different Aluminum Welding Techniques

Víctor Rubio Navarro (*) Julio Cesar Damián García (*) Mauricio Villagrán Chávez (*)

(*)

Investigación Aplicada a la Ingeniería. Estudiantes de Ingeniería Industrial.

Universidad del Valle de México. Blvd. Villas del Mesón 1000, Provincia Juriquilla, 76230 Santiago de Querétaro, Querétaro

Introduction:

The aluminum is a chemical element that has non-ferromagnetic metal properties. It is extracted from bauxite. The use of aluminum in the industry has increased a lot nowadays because it has very particular properties.

One of their advantages is that this kind of metal is 100% recyclable, so it makes aluminum an alternative innovative material for taking care of our environment compared against other metals used in the industry.

In fact physically, chemically and mechanically aluminum is a metal like steel, brass, copper, zinc, lead or titanium. It can be melted, cast, formed and machined much like these metals and it conducts electric current.

 In our investigation we will be working with aluminum alloys 6061 and 7020. And with the more resistance aluminum alloys such as AA6XXX and AA7XXX.

These alloys (AA6XXX /AA7XXX) are considered of medium and high resistance because of their strength and are frequently used in different industries such as aeronautical, automotive, etc.

We will try to determinate which welding technique is the best by doing the resistance tests of flections and strength.

There are the welding techniques with which we’ll be working:

GTAW(TIG): TIG welding is a process in which a tungsten electrode, is used not consumable. The electrode, the arc and the area around the weld pool are protected from the atmosphere by an inert gas. If necessary to provide the filler material must be made from one side of the weld.

GMAW(MIG): Is a process in which a non-consumable electrode of solid tungsten electrode, arc and the area around the weld pool are protected from the atmosphere by a shield of inert gas, if any filler metal used is required added to the welding from the front edge of the weld to be formed.

SMAW(arc welding): Ia type of welding that uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. They can use either direct (DC) or alternating (AC) current, and consumable or non-consumable electrodes

Acetylene: Oxy-fuel welding (commonly called oxyacetylene welding, oxy welding, or gas welding in the U.S.) and oxy-fuel cutting are processes that use fuel gases and oxygen to weld and cut metals, respectively. It use pure oxygen, instead of air, is used to increase the flame temperature to allow localized melting of the work piece material in a room environment

Sources:

-Carlos Alonso Marcos, Manual de prácticas de soldaduras, p.74 ,2006.

-José Cheto , Manual de soldaduras MIG MAG,p.92, 3ra edición, 2008.

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