Abstract:In order to obtain a high-strength steel sheet with excellent explosion-caused collapse resistance, the rolling process and heat treatment method of the high-strength steel sheet and the anti- collapse effect of the concrete-steel double-layer structure were studied. The research mainly adopts the methods of laboratory trial production, on-site explosive collapse test and numerical calculation. The results show that when the cooling rate reaches 30℃/s, the steel plate sample structure is composed of a single martensite. The double-pass compression process is adopted, and the temperature of the austenite recrystallization zone is controlled above 1000°C, which can ensure that the rolling process is in the austenite recrystallization zone and the grains are fully refined. For the rolling in the austenite unrecrystallized zone, the temperature of the second-stage start-up rolling is controlled between 880 and 980°C. The tempering process of water quenching at 910°C for 30 minutes and tempering at 600°C for 50 minutes can be used to obtain a complete tempered sorbite structure. The fine-grained cementite is dispersed in the ferrite matrix, and the high-strength steel plate has the best comprehensive mechanical properties at this time. Using 6mm thick high-strength steel plate as the target backplane, the amount of concrete is reduced by 25%, the amount of steel is reduced by 25%, the deformation is reduced by 42mm, and the damage degree and scope of the concrete slab are also significantly reduced, indicating that the high-strength steel plate has a better anti-explosive collapse effect, and the anti-collapse coefficient can be taken as 0.196.
袁伟泽1,徐干成1,李成学1,聂梦琪1,颉旭虎1,陈林恒2. 高强抗震塌钢板研制及爆炸试验研究[J]. 振动与冲击, 2023, 42(3): 313-321.
YUAN Weize1, XU Gancheng1, LI Chengxue1, NIE Mengqi1, XIE Xuhu1, CHEN Linheng2. Development and blast tests of high-strength anti-collapse steel plate. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(3): 313-321.
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