Guidelines to Tungsten arc welding - Heanjia Super-metals Co., Ltd.

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Guidelines to Tungsten arc welding

Unlikely other arc welding procedures, gas tungsten arc welding is a kind of sluggish task. Undoubtedly extreme downtime for troubleshooting tends the procedure to become even sluggish, expensive and tedious proposition ads more slow factors.

Moreover popular welding halts like porosity, undercutting or lesser fusion that occur within the arc welding processes of tungsten wire and two more drawbacks may occur in the tungsten welding process such as the dulling of tungsten electrode, arc starting problems. However if the welder is familiar with few factors and able to recognize them, he can solve the above issues easily that may become serious later.

In order to create an arc for tungsten welding ad sending the current for welding to the base material, the process requires the presence of tungsten electrode that is a non - consumable material. Tungsten is an element with the highest melting point among all the elements in the periodic table that it has a melting point about 6170 degree F. Thus in theories it is impossible to liquefy the metal that is actually untrue.

The wider use of tungsten during the welding process is the common issue of welding process. In the alternating current flow oriented applications, the aluminum alloys are commonly by which the operators are able to set the balance control on the welding power positive flow to the electrode in order to eradicate the oxides successfully from the welded area.

Although following this arrangement tends to production of heat to the tungsten due to which the metal can melt.So, melting of tungsten is avoided by turning the power flow negative to the electrode that enhances the magnitude of heat transferred to the working place instead of tungsten. According to thumb rule the balanced control of welding power of 70% - 80% is set to the electrode negative. And in the tungsten welding arc process on ferrous alloys like carbon and stainless steels by utilizing the direct current flow, the power supply is set in negative mode to the tungsten electrode.

Second reason of enormous consumption of tungsten in the welding process is the use of large value of welding current for the particular given diameter of electrode irrespective of the kind of current used i.e. alternative current or direct current. The users are suggested to follow the tungsten recommended parameters for the particular diameter of electrode. In case the electrode is larger as compare to the current provided the arc may turn around the tip. On the other side little electrode for the given current may be liquefied and cause instability in the arc.

At last inappropriate or contagion gas shielding and slack or cracked fittings are also the reason of abundant consumption of tungsten. Therefore the users must use the clean tungsten wire for welding, pure argon shielding and they must be cautious for the whole hoses in connection and fittings are properly tightened before start welding.

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