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The welding process which uses a blanket of fusible granular flux is
[ME 2016,Set-2]
  • a)
    tungsten inert gas welding
  • b)
    submerged arc welding
  • c)
    electroslag welding
  • d)
    thermit welding
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The welding process which uses a blanket of fusible granular flux is[M...
In submerged arc welding, the arc is completely submerged inside the granular flux powder and thus forming as blanket.
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The welding process which uses a blanket of fusible granular flux is[M...
The welding process which use a blanket of fusible granular flux is

submerged arc welding
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Community Answer
The welding process which uses a blanket of fusible granular flux is[M...
Submerged arc welding is the welding process that uses a blanket of fusible granular flux. In this process, the welding is carried out beneath a layer of flux, which provides protection to the arc and the molten weld pool.

Working principle:
Submerged arc welding (SAW) is an arc welding process that involves the formation of an arc between a continuously fed electrode and the workpiece. The arc is shielded by a layer of fusible granular flux, which is fed onto the welding zone. The flux melts and forms a protective blanket over the arc and the molten weld pool, preventing the atmospheric contamination of the weld.

Process details:
The process of submerged arc welding involves the following steps:
1. Preparation: The workpiece to be welded is prepared by cleaning and removing any contaminants such as rust, oil, or paint.
2. Electrode positioning: The welding electrode, which is a continuous wire, is positioned in close proximity to the joint to be welded.
3. Flux application: The flux, in the form of granular powder, is continuously fed onto the welding zone. The flux serves multiple purposes, including arc shielding, slag formation, and alloying elements introduction.
4. Arc initiation: The arc is initiated by applying a high voltage between the electrode and the workpiece. Once the arc is established, the welding current is applied.
5. Welding process: As the electrode is continuously fed, the arc melts the electrode wire and the base metal, creating a molten weld pool. The flux covering the arc and the weld pool melts, forming a protective slag layer.
6. Slag removal: After the welding is completed, the slag layer solidifies and can be easily removed by chipping or grinding.
7. Post-weld treatment: The welded joint may undergo post-weld treatments such as stress relieving, cleaning, and inspection.

Advantages of submerged arc welding:
- High welding speed and productivity due to the continuous electrode feeding.
- Deep penetration and excellent weld quality.
- The flux provides a protective layer, preventing the atmospheric contamination of the weld.
- Suitable for welding thick sections of ferrous materials.
- Versatile process, capable of welding a wide range of materials including carbon steels, stainless steels, and low alloy steels.

In conclusion, submerged arc welding is the welding process that uses a blanket of fusible granular flux. It offers numerous advantages and is commonly used in various industries for its high productivity and quality welds.
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The welding process which uses a blanket of fusible granular flux is[ME 2016,Set-2]a)tungsten inert gas weldingb)submerged arc weldingc)electroslag weldingd)thermit weldingCorrect answer is option 'B'. Can you explain this answer?
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