介绍了导电体内部裂纹止裂的一种新实验方法。实验结果表明：利用电磁热效应对导体内部裂纹进行止裂不但是可行的，而且具有保持外力作用不变、方法简便、收效迅速、提高韧性等优点。其原理是在向导体通入脉冲电流的瞬间，裂纹尖端处的温度急剧升高，使材料熔化形成焊口，同时在周围产生足够大的热压应力，破坏了干线裂纹源的形成，遏制了裂纹的扩展。 A new experimental method for crack arrest in electrical conductor is introduced. The experimental results show that it is not only feasible to use the electromagnetic heat effect to crack the cracks in the conductor, but also to keep the external force unchanged, the method is simple, the rapid effect is achieved and the toughness is improved. The principle is that when the pulse current is applied to the conductor, the temperature at the tip of the crack rises sharply, the material melts to form a weld, and at the same time there is a large enough hot compressive stress in the periphery to destroy the formation of the source of the trunk line crack, Crack expansion.