Type of Flame : Welding

Welding :

Types of flame :

The different of flame can be produced by varrying the oxygen , acceteteyne ratio .

1. Neutral flame

2. Oxidizing flame

3. Carburizing flame 

Neutral Flame :

• The ratio of oxygen and aceteyne is equal to 1:1 . 
• The inner core will be yellow or red and outer cone will be light blue colour .
• The maximum temperature of neutral flame is 3100° that is inner core .
• Outer core temperature is 1275° .
• N is the size of inner core .

      • The neutral flame is used to joining and cutting of all metals .

Oxydizing Flame :

• The ratio of oxygen and acetelyne is equal to 1.15 to  1.5 that is greater than 1
• The maximum temperature of oxydizing Flame is 3300 ° that is inner core.
• Outer temperature is 1350 °.
• In oxidizing flame exess amount of oxygen is present .
• Size of inner core is N/3 to N/2 .
• Oxydizing Flame is used to joining of high reactivd metals.like AL , Mg .

Carburizing Flame :

• The ratio of oxygen and acetelyne is equal to 0.85 to 0.95 that is less than 1 .
• The maximum temperature of carburizing flame is 2900 ° that is inner core .
• Outer core temperature is 1150° .
• The size of inner core is 2N to 3N.
• Because of short supply of oxygen the flame has to travel for a long distance .
• Carburizing flame is used to joining of high carbon steels , copper alloy and nickel .

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