Generation of powerful pulse current is a key problem for crack arrest by electromagnetic heat effect.

如何产生高强度脉冲电流是应用电磁热效应遏制金属裂纹扩展的一个关键问题。

The crack resistance of X65 steel is much better than that of the weld and X65 pipeline steel has good crack arrest property.

X65钢母材的抗开裂性能明显优于焊缝，且具有良好的止裂性能。

Using theory of electromagnetic heat effect, the possibility of crack arrest on 35 steel was studied by super intention pulses electric current generator.

采用理论分析和实验研究的方法讨论了应用电磁热效应对金属构件中裂纹实施局部跨越止裂的技术。

Meanwhile, the influences of pipeline internal pressure, wall thickness, crack arrest length and initial crack velocity on the crack driving force (crack propagation) are further studied.

进而分析了管道内压、壁厚、裂纹止裂长度和初始裂纹速度对裂纹驱动力(也即裂纹扩展)的影响。

The techniques for repair are studied after crack arrest in metal dies using electromagnetic heating, such as electrical spark melt joining, reinforced build-up welding and brush electroplating.

研究了各种实际金属模具中裂纹电磁热止裂后的修复技术，如电火花放电熔焊搭桥、强化堆焊、刷镀等；