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灰铸铁反白口现象是一种铸件缺陷,生成的原因历来有很多介释,最主要的是氢气促进的说法和因形变稳定针状碳化物和过冷石墨的说法.张承甫同志认为前一说法缺乏足够根据,而后一说法不能解释小型铸件的反白口现象,因而根据自己在实际生产中的经验,结合理论上的分析,提出来新的看法,这些看法是从热传导的理论出发,证明铸件内部冷却速度在条件具备时也可能超过铸件外部,这种冷却速度的差异永远是造成包括反白口在内的铸件断面局部白口的原因.
Gray cast iron anti-white phenomenon is a casting defect, the reason has always been generated a lot of interpretation, the most important is the promotion of hydrogen and deformation due to acicular carbide and supercooling graphite argument .Zhang Chengfu think the previous statement Lack of sufficient basis, and the latter can not explain the interpretation of small castings anti-whistling phenomenon, which based on their own experience in the actual production, combined with theoretical analysis, come up with new ideas, these views is based on the theory of heat conduction to prove that the casting The internal cooling rate may exceed the outside of the casting when the conditions are available and the difference in cooling rate will always be the cause of the local whiteness of the castings including the anti-white finish.