EH36船板钢大线能量焊接连续冷却转变行为研究  

Study on Transformation Behavior of EH36 Steel Plate for Shipbuilding with High Heat Input Welding by Continuously Cooling

作　　者：王佳骥[1] 付魁军[1] 及玉梅[1] 吕冬[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《鞍钢技术》2013年第1期32-35,共4页Angang Technology

摘　　要：利用Gleeble3800热模拟试验机,对EH36船板大线能量焊接模拟热影响区连续冷却转变行为和不同冷却速度下模拟焊接热影响区的相变组织进行了研究。结果表明,当冷速足够大时,在440℃发生马氏体转变,相变组织均为马氏体;随着冷速逐渐下降,相变组织由以马氏体和贝氏体为主变为铁素体和贝氏体。冷却速度在2~5℃/s范围内,焊接热影响区具有优良的性能。根据SH-CCT曲线选择的焊接工艺合理,大线能量焊接热影响区性能满足船级社规范要求。The transformation behavior in simulating heat-affected zone（HAZ） of the EH36 steel plate with high heat input welding by continuous cooling and the microstructures of the phase transformations in simulating heat-affected zone at different speeds for cooling the HAZ of the EH36 steel plate for shipbuilding are studied by Gleeble3800 thermal simulation testing machine.The research results show that the martensitic phase transformations occur at 440 ℃ when the cooling speed is fast enough,which means that the microstructure of all phase transformations is martensite.While the microstructures of phase transformations gradually become into ferrite and bainite from martensite and bainite which are the main phases at the beginning as the cooling speed slows down.HAZ has excellent properties when the cooling speed is between 2 ℃/s and 5 ℃/s,and therefore it is concluded that the welding technology which is selected based on the curve of SH-CCT is suitable and the properties of HAZ of the EH36 steel plate for shipbuilding with high heat input welding can meet the requirements specified by recognized ship classification societies.

关 键 词：EH36船板 大线能量焊接 热模拟 连续冷却 转变行为 

分 类 号：TG457[金属学及工艺—焊接]