Recently, when communicating with customers, some customers raised the issue of gas cutting. Why can't the steel casting factory use gas cutting treatment? I've read some information about this problem and summarized it for you:

From the layman's point of view, the gas cutting for supporting wheel processing is to melt iron with flame and blow away the molten iron directly with gas. This understanding is wrong. In fact, gas cutting is the process of metal burning. If gas cutting is to be ignited directly, it is necessary to directly heat the metal above the ignition point with oxyacetylene flame. When the hyperbaric oxygen is turned on, the metal will start to burn violently in oxygen.

Oxides generated after combustion will be directly blown away by high-pressure oxygen, and the heat generated after combustion will continue to heat the metal. The main condition of gas cutting is that the ignition point of the material to be cut must be lower than the melting point. If the ignition point is higher than its own melting point, it will easily melt before ignition, and the melted part will be blown away, making it impossible for the metal to cut without reaching the ignition point. This happens when gas cutting is used to process large steel castings.

Every material has a melting point. If the carbon content is higher than the melting point, gas cutting cannot be carried out. The carbon content of cast iron is about 2% to 4%. Pay attention to this problem when using gas cutting!