Why can't diamond tools be used to process iron-based materials?

Generally, ferrous metals mainly include steel. There is a large amount of carbon in these materials. It can be said that ferrous metals are carbon-loving materials, and diamonds are also composed of carbon elements. If diamond tools are used to process iron-based materials, the carbon element on the surface of the diamond will easily It adheres to chips and cutting surfaces, causing the tool to become less sharp and causing the temperature in the processing area to rise. When the temperature is high, and there is a large amount of oxygen in the air, diamond is prone to elemental carbonization, and the macroscopic manifestation is diamond graphitization. This is why diamond tools generally do not process ferrous metal materials.
But this statement is a traditional statement.
If it is necessary to use diamond tools to process iron-based materials, it is necessary to cool down, increase the chip removal space, reduce cutting force, etc. It is also possible to process iron-based materials.