The Law of the Flow of Gas inside the Vapor Blanket(二)

In order to explain the several phenomena occurred in the experiment,a study is made to find out the law of the flow of gas inside the vapor blanket during quench cooling.The study showed that the flow of gas inside a vapor blanket varied with the facing direction of the surface where the vapor blanket was located.Five basic directions are identified and the laws of the flow of gas inside vapor blanket that face these basic directions are inferred through study.From the formation of the vapor blanket on the work piece to the disappearance of the last vapor blanket,the law acts in the areas that the vapor blankets cover.The act of the law has not only continuously produced and increased the thickness-irrelevant temperature difference inside the surface with the same facing direction,but also brought about an unknown temperature difference among the surfaces facing different directions.The law is independent with the four-stage differentiation theory which was put forward previously.The law and the theory act together,which is probably the main reason for the quenching distortion of work pieces.