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目的研究６０３和６７５两种结构钢在平面波载荷下层裂形成的微观特征．方法借助于冶金测试方法，对层裂飞片内损伤的形成、扩展和聚合进行分析，以便研究结构钢的层裂机制．结果钢中密集分布的夹杂物容易成为裂纹源；电渣重溶净化的钢晶界以及塑性变形不均匀区优先成为裂纹源，这一结果与准静态下的结果完全不同．结论装甲钢层裂的行为与冶金质量、微观组织密切相关
Aim To study the microscopic characteristics of the two types of structural steel 603 and 675 under the plane wave loading. Methods By means of metallurgical test, the formation, propagation and polymerization of the damage in the split-layer flying-blade were analyzed in order to study the mechanism of the splitting of the structural steel. As a result, the inclusions distributed intensively in steel tend to be the source of cracks. The grain boundary and the plastic deformation in the electro-slag remelting preferentially become the source of cracks. This result is totally different from the results under quasi-static conditions. Conclusion The behavior of armor steel splitting is closely related to metallurgical quality and microstructure