Tungsten inclusions, Mechanical Engineering

Tungsten Inclusions

Tungsten inclusion is a discontinuity found only in TIG welding. Particles of tungsten from the electrode can be embedded in a weld when improper welding procedures are used. Typical causes are as follows:

 

  • The Contact of electrode tip with molten weld pool.
  • Contact of the filler metal with hot tip of electrode.
  • Contamination of  the electrode tip by spatter from the weld pool.
  • Exceeds the current limit for a given electrode size or type.
  • Extension of electrodes beyond their normal distances from the collet (as with long nozzles) resulting in overheating of the electrode.
  • Inadequate tightening of  holding collet or electrode chuck.
  • Inadequate shielding gas flow rates or excessive wind drafts resulting in oxidation of the electrode tip.
  • Defects such as splits or cracks in the electrode.
  • Use of improper shielding gases such as argon - oxygen or argon - CO2 mixtures that are used for gas metal arc welding 
Posted Date: 9/14/2012 9:35:59 AM | Location : United States







Related Discussions:- Tungsten inclusions, Assignment Help, Ask Question on Tungsten inclusions, Get Answer, Expert's Help, Tungsten inclusions Discussions

Write discussion on Tungsten inclusions
Your posts are moderated
Related Questions
I have completed mechanical engineering ..2012 passed out...i need to get job in core companies...how i can get it

Discuss the method of properties, manufacturing and applications of following cutting tool materials: (i) Carbides (ii) Ceramics (iii) Cubic Boron Nitride (CBN) What ar

Applications and Disadvantages of Electro Chemical Machining Disadvantage of Electro Chemical Machining 1. The tools are more difficult to design. 2. Initial cost is hi

Analyse the beam: Analyse the beam illustrated in Figure and draw the SFD, BND & thrust diagram. Situated the point of contraflexure, if any. Figure Solution


Which of the following is an open pair?

Internal combustion models of engine: The engines which develop power by combustion of fuel within the engine are called internal combustion engines. The examples of internal

Split the harmonic motion x=10 sin (wt + 30 0 ) into two harmonic motions one having a phase angle of zero and the other of 45 0 . Describe and derive an expression for energy m

What is Drilling It is an operation by which holes are produced in solid metal by means of revolving tool known as „Drill?. The various operations on drilling machine.

describe about pendulum pump mechanism and diagram