Electro slag welding process, Other Engineering

Q. Describe the electro slag welding process.

                                                  OR

       Describe electro slag welding process. What are the specific situations where electro slag welding process is used.

Ans. Electro slag welding: In this welding process, welding heat is produced by the molten slag, which melts the filler metal and the surfaces of the work to be welded.

Operation: Electroslag welding is initiated by starting an arc between the filler metal/electrode and the work. This arc heats the flux and melts it to form the slag. The arc is then extinguished and the slag (conductive) is maintained in molted condition by its resistance to the flow of electric current between the electrode and the work. The temperature of this molten slag pool is approx. 1650º at the surface and 1950º inside, under the surface. This much heat is sufficient to weld thick sections or joints in a single pass. Several electrodes are used for long welds so that the heat is uniformly spread.

         Water-cooled shoe or dam plate fastened to the dies of the workpiece prevents the molten metal from running off. These plates also assist the solidification process by removing heat and are moved up as the weld progress.

Flux : Combination of oxides of silicon, manganese, titanium, calcium magnesium and fulspar are used as flux in this process. It shields the molten metal and clears the impurities from the molten metal.

  • Advantages

(i) Thicker plates can be welded in single pass and economically.

(ii) Extremely high deposition rates can be achieved (10-20 kg/hr/electrode).

(iii) Flux consumption as compared to submerged arc welding is low.

(iv) No spattering and arc flashing occurs.

    (v) Welding speed of about 1.5 m/hr is possible.

  • Disadvantages

 (i) Submerged arc welding is more economical than electroslag welding for joints below 60 mm.

 (ii) It is difficult to close cylindrical welds.

 (iii) Welding is carried out in vertical up position only.

  • Applications

 (i) Heavy plates, forging and castings can be easily butt-welded.

 (ii) Following alloys can be welded.

 (iii) Low carbon and medium carbon steel.

 (iv) High strength structural steels.

 (v) Alloy steels such as stainless steel and nickel alloys.

Posted Date: 8/3/2012 6:05:12 AM | Location : United States







Related Discussions:- Electro slag welding process, Assignment Help, Ask Question on Electro slag welding process, Get Answer, Expert's Help, Electro slag welding process Discussions

Write discussion on Electro slag welding process
Your posts are moderated
Related Questions
After five years, what is Judy’s total income (interest par) from each bond? Should she use this total as a way of deciding which bond to purchase?

False Alarms & CM  The mis-association of false alarms with target tracks has two main e!ects.  - It tends to increase the actual tracking errors in the system because

i want to take your kelp in writing the research paper, which can be published in reputed international journal.

i want images of series clippers

HOW WOULD YOU JUDGE THE POTENTIAL PROFIT OF BAJAJ ELECTRONICS


i have a project to be completed, the project is, How to make a device which warns you when your water reservoir is full?? i want the name of device needed and the way to complete

VK Ltd a multi-product Company, furnishes you the following data relating to theyear 2000.First Half of the year Second Half of the yearSales Rs. 45,000 Rs. 50,000 Total Cost Rs. 4


Dit fft idft