Why cannot flame and plasma cutting be used for process pipelines made of stainless steel and alloy steel?
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Why can’t stainless steel and alloy steel be cut using flame and plasma cutting?
Plasma cutting is possible, but grinding is required
The acetylene flame does not reach the melting temperature, so it cannot cut
It’s not for the reason you mentioned; an acetylene-pure oxygen flame can reach over 3500 degrees, and even an acetylene-air flame exceeds 2000 degrees. Tell me, which type of stainless steel has a melting point higher than 2000 degrees? Stainless steel is not suitable for flame cutting because it is an alloy with poor thermal conductivity, and the slag formed by the flame has high viscosity due to the presence of chromium trioxide, making it difficult for the flame to blow this slag away from the cutting surface quickly. In fact, for some stainless steel materials, cutting can be achieved by using a high-temperature flame in combination with increased air pressure, but the cut surface still requires further treatment.
Does flame cutting have any effect on the material of pipes?
Where the flame makes contact has an impact; if there is also an impact in areas not touched by the flame, it’s because people in liberal arts fields have a more developed intuitive way of thinking
Flame cutting creates a certain heat-affected zone, which may need to be removed for products with high requirements.