摘要
在材料成分设计的基础上,采用ESP工艺试制生产高强护栏钢,并对其进行力学性能测试、实车足尺碰撞试验以及碳足迹计算。结果表明:高强护栏钢力学性能指标抗拉强度超700 MPa,屈服强度超620 MPa,断后伸长率达20%及以上;在防撞性能方面,高强护栏钢能够成功阻挡小型客车、中型客车及大型货车碰撞,未出现车辆穿越等情况,且能引导车辆按预定方向驶出;在碳足迹方面,护栏立柱和护栏板是碳足迹最大的部分,1 km的SB级高强钢护栏碳排放较同等级Q235钢护栏显著降低,碳排放仅80.86 tCO_(2)e,约减少了70%。
Based on material composition design,the ESP(Endless Strip Production)process was employed to trial-produce high-strength barrier steel.Mechanical property testing,full-scale vehicle collision experiments,and carbon footprint calculations were conducted.The results demonstrated that the tensile strength of the high-strength barrier steel exceeded 700 MPa,with a yield strength over 620 MPa and an elongation after fracture of 20%or higher.In terms of crashworthiness,the barrier steel successfully guided small passenger cars,medium buses,and large trucks during collisions,preventing vehicle penetration and ensuring controlled redirection.Furthermore,carbon footprint analysis revealed that barrier posts and panels contributed the most to carbon emissions.For 1 km of SB-grade high-strength steel barriers,the total carbon emissions were only 80.86 tCO_(2)e,representing a reduction of approximately 70%compared to equivalent Q235 steel barriers.
作者
闫书明
李玉鑫
龚帅
时文成
雷正保
Yan Shuming;Li Yuxin;Gong Shuai;Shi Wencheng;Lei Zhengbao(Changsha University of Science and Technology;Shandong Highway Co.,Ltd.;Beijing Hualuan Traffic Technology Co.,Ltd.)
出处
《冶金能源》
北大核心
2025年第4期3-7,共5页
Energy For Metallurgical Industry
基金
国家自然科学基金资助项目(U24A20195)
《波形梁合金钢护栏》T/CECS 10088—2020标准编制项目。
关键词
高强护栏钢
ESP工艺
力学性能
防撞性能
碳足迹
high strength barrier steel
ESP technology
mechanical property
crashworthiness
carbon footprint
