Types of Gas Welding Flames and its Application

The oxygen and acetylene are blended into weld for the various extent and its outcome in various sorts of flames, each the blazes depend on preferred standpoint and application. The right concentration of gas blend and gas welding flames is critical for the gas welding process.

Neutral gas welding flames

In this sorts of gas, welding blazes are given the equivalent measure of oxygen and acetylene are blended and to permit consume with over 3260⁰C. It has been two zones. The unbiased casing is comprising of sharp cone reached out from the tip of light and encompassed by the envelope.

This arrangement the blue shading by methods for inward cone and it warm to soften. The cone envelope gives the mix of oxygen and little volume of acetylene from the inward cone. It blends build up a cover for liquid metal in view of to dodge the oxidation procedure. 

It has been two zones. That mix no impact on the unbiased fire in the welding process, so that is wanted to the majority of modern application.

For following metals the neutral type of flame can be used,

• Mild Steel
• Aluminium
• Stainless steel
• Cast iron

Oxidizing flames

In this fire is overabundance measure of oxygen provided to the welding procedure. The proportion of oxygen and acetylene is 1.5:1. In this sort of zone having two Zones.

It will be more blazing than the unbiased edge on account of abundance measure of oxygen mix to acetylene, So it gives mush measure of warmth at the temperature of 3482⁰C. Along these lines, the temperature is higher than fire, so it is utilized to effortlessly warm the metal, however, abundance measure of oxygen consolidate to the base metal type of oxide. The oxide will decrease the weld joint quality. Consequently feasible for the following metal to be welded.

Read: Wiens Law

The following metals are examples for which oxidizing flames used,

1. Zinc-based alloy
2. Cast iron
3. Copper-based alloy (Brass)
4. Manganese Steels

Carburising Flame

In this carburizing flame will reduce the volume of oxygen and excess the acetylene volume. It contains three zones. They are,

1. Sharply define for inner cone
2. Bluish outer envelope
3. Intermediate whitish acetylene feather.

It outer envelope is longer than the neutral flame. The intermediate cone is an excess amount of acetylene volume in the flame. It made temperature range of 3038⁰C. In this flame having not completely burnt in the excess acetylene. The unborn carbon is left on the molten metal. In this forms brittle substance called by iron carbide at the weld joint. It only limited application only possible.