Carburizing process for
seamless steel tubes, steel pipe can be enhanced HRC hardness. Carburizing, is a method of metal surface treatment, carburizing mostly low-carbon steel or low alloy steel, the specific method is placed in a workpiece having active carburizing medium heated to 900--950 degrees Celsius single phase austenite region after holding sufficient time to make the carburizing medium decomposition of activated carbon atoms into the steel surface, thereby obtaining a high carbon surface, the center remains the original ingredients.
After grinding the surface of the carburized layer was caused by softening phenomenon, known as tempering grinding process produces. This is because the fast grinding feed rate, wheel size and hardness or speed improper selection, or the grinding process cooling is not sufficient, it is easy to produce such defects. This is because the heat when grinding the surface softened sake. Grinding flashback defective parts wear is reduced.
Hexagonal surface cracks, it is because the surfaces are too hard grinding wheel, and due to heat. Also with the lack of tempering heat treatment, residual stress too much about. After etching with an acid, any defective parts of the black, with no distinction between the defect at the open. This is generating heat tempering grinding. Making the horse so that body into Troostite organization's sake. In fact, after the grinding crack the naked eye can see.
