Explain with neat sketch the various parts, principle and working of a Gas Welding process. Mention the different types of flames and its significance also.
1)Neutral Flame: - A neutral flame is obtained when equal amounts of oxygen and acetylene are mixed and burnt in a torch.
Applications: - stainless steel, cast iron, copper ,mild steel and aluminum
2) Oxidizing Flame: - If more oxygen is added, the cone becomes darker and more pointed, while the envelope becomes shorter and is called Oxidizing flame
Applications: - copper base alloy, zinc base metal, Brass and Bronze
3) Carburizing Flame: A carburizing or reducing flame is obtained when acetylene is supplied more than oxygen.
Applications:-high carbon steel, nonferrous alloy