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Oxyacetylene reducing flame is used while carrying out the welding on
- a)mild steel
- b)high carbon steel
- c)grey cast iron
- d)alloy steels
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Oxyacetylene reducing flame is used while carrying out the welding ona...
Mild Steel, Cast Iron, Low carbon steel, Aluminium – Neutral Flame
High carbon steel, Nickel- Carburising Flame
Brass, Bronze, Zinc base materials – Oxidising Flame
This question is part of UPSC exam. View all Mechanical Engineering courses
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Oxyacetylene reducing flame is used while carrying out the welding ona...
Oxyacetylene reducing flame is used while carrying out welding on grey cast iron. The reducing flame is produced by adjusting the oxyacetylene flame to have an excess of acetylene gas. The reducing flame has a low oxygen content, which makes it ideal for welding grey cast iron.
Grey cast iron is a brittle material that is prone to cracking when subjected to high temperatures. The reducing flame helps to prevent the formation of oxides on the surface of the metal during welding. Oxides can act as a barrier to the flow of molten metal and can cause porosity and other defects in the weld.
The reducing flame also produces a carbon-rich environment, which helps to promote the formation of graphite in the weld. Graphite is a desirable feature in grey cast iron because it provides lubrication and reduces friction in moving parts.
When welding grey cast iron, it is important to preheat the material to reduce the risk of cracking. The preheat temperature should be between 500-700°C. The welding should be carried out using small diameter electrodes to reduce heat input and minimize the risk of cracking.
In conclusion, Oxyacetylene reducing flame is used while carrying out welding on grey cast iron due to its low oxygen content and carbon-rich environment, which helps to prevent the formation of oxides and promotes the formation of graphite in the weld.
Grey cast iron is a brittle material that is prone to cracking when subjected to high temperatures. The reducing flame helps to prevent the formation of oxides on the surface of the metal during welding. Oxides can act as a barrier to the flow of molten metal and can cause porosity and other defects in the weld.
The reducing flame also produces a carbon-rich environment, which helps to promote the formation of graphite in the weld. Graphite is a desirable feature in grey cast iron because it provides lubrication and reduces friction in moving parts.
When welding grey cast iron, it is important to preheat the material to reduce the risk of cracking. The preheat temperature should be between 500-700°C. The welding should be carried out using small diameter electrodes to reduce heat input and minimize the risk of cracking.
In conclusion, Oxyacetylene reducing flame is used while carrying out welding on grey cast iron due to its low oxygen content and carbon-rich environment, which helps to prevent the formation of oxides and promotes the formation of graphite in the weld.
Community Answer
Oxyacetylene reducing flame is used while carrying out the welding ona...
Ans B hoga High carbon steel
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Oxyacetylene reducing flame is used while carrying out the welding ona)mild steelb)high carbon steelc)grey cast irond)alloy steelsCorrect answer is option 'C'. Can you explain this answer?
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