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利用电磁场的热效应对带有裂纹的载流导体进行裂纹止裂，是达到延长其工作寿命、提高安全性和可靠性的一种行之有效的方法．理论计算和试验观察都证明了：载流导体中裂纹尖端处的热集中效应，能够在附近的一个很小范围内熔化形成微小的焊口，裂纹前缘处的曲率半径瞬间增加了２～３个数量级，显著地减少了应力集中，阻止了干线裂纹源的形成，有效地遏制了裂纹的扩展。本文阐述了这一物理过程的研究现状、进展情况以及未来应用前景．
Using the thermal effect of the electromagnetic field to crack the cracked current-carrying conductor, it is an effective way to prolong its working life and improve its safety and reliability. Both theoretical calculation and experimental observation show that the heat concentration effect at the crack tip in the current-carrying conductor can be melted to form a tiny weld in a small area nearby, and the radius of curvature at the crack front edge instantly increases by 2 to 3 By order of magnitude, the stress concentration is significantly reduced, preventing the formation of trunk line cracks and effectively preventing the crack growth. This article expounds the research status, progress and future application of this physical process.