大线能量焊接系列船体钢开发实践  

Development and Practice of Series Hull Steel with Large Heat Input Welding

作　　者：郭文斌 肖鹏程 么敬文 刘志远[1] 王重君 曹亚坤 陈孟伟 Guo Wenbin;Xiao Pengcheng;Yao Jingwen;Liu Zhiyuan;Wang Chongjun;Cao Yakun;Chen Mengwei(Tangshan Medium and Heavy Plate Co.,Ltd.;North China University of Science and Technology)

机构地区：[1]唐山中厚板材有限公司 [2]华北理工大学

出　　处：《宽厚板》2023年第4期13-16,共4页Wide and Heavy Plate

摘　　要：结合华北理工大学高品质钢连铸实验室开发的氧化物冶金技术,优化调整船体钢的冶炼、轧制及焊接试验工艺。在传统的降C、增Mn、加Ti成分设计基础上,添加微量的合金元素,优化设计DH36大线能量焊接船体钢的化学成分。对成品厚度30 mm的轧制板材在80 kJ/cm焊接线能量条件下进行焊接试验,并分别在-20℃和-40℃温度下进行冲击性能测试。结果发现:冲击断口表面有明显起伏,呈灰暗色,无明显金属光泽,为韧性断裂,钢板的焊接HAZ低温冲击韧性良好。Combined with the oxide metallurgy technology developed by the High Quality Steel Continuous Casting Laboratory of North China University of Science and Technology,this paper optimizes and adjusts the melting,rolling and welding test processes of hull steel.On the basis of traditional composition design of reducing C,increasing Mn and adding Ti,the chemical composition design of DH36 hull steel with high heat input welding is optimized by adding the trace alloying elements.The welding test is conducted on the as-rolled plate of 30 mm thickness under the conditions of 80 kJ/cm heat input,and the impact properties tests are performed at-20℃and-40℃respectively.The results show that the impact fracture surface has obvious undulation and is of grey and dark colour without apparent metallic lusster,which is ductile fracture.The test plate is of good low temperature impact toughness at welding HAZ.

关 键 词：冲击性能 焊接试验 线能量 低温 

分 类 号：U668.2[交通运输工程—船舶及航道工程] TG457.11[交通运输工程—船舶与海洋工程]