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中文摘要：
高强度船用钢热成形时，由于加热与淬火的交互作用，形成渐变微观结构。研究表明，渐变微观结构使得材料的硬度、强度从里到表依次降低，延展性依次增加，较平缓的冲击力水平及材料的逐层失效使结构保持较高的吸能能力；具有较小的变形抗力、塑性好、成形极限高，而且成形零件的精度和强度较高。渐变微观结构综合了各单相材料的优秀性能，适合用于承受冲击吸能的构件。
英文摘要：
Under the combining function of heat and quench, the high strength marine steel for hot forming comes into gradual change microstructure. The study indicates that gradual change microstructure makes the rigidity and strength of high-strength marine decrease from inside to outside, and the ductifity increases accordingly. The even slow of wallop and material of pursue layer invalidation make the material keep good ability of absorbing energy. It has small impact force, good plasticity, high form utmost and high precision and strength of form part. The gradual change microstructure has the comprehensive performance of every single phase material, which is a good alternative material in application of absorbing energy.
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