脱氧方式对EH40钢焊接热影响区组织及性能的影响  

Effects of Deoxidation Mode on Microstructure and Mechanical Properties of EH40 Steel Welding Heat Affected Zone

作　　者：葛园 赵晋斌 陈林恒 李恒坤 车马俊 Ge Yuan;Zhao Jinbin;Chen Linheng;Li Hengkun;Che Majun(Nanjing Iron and Steel Co.,Ltd.;Jiangsu Key Laboratory for Premium Steel Material)

机构地区：[1]南京钢铁股份有限公司 [2]江苏省高端钢铁材料重点实验室

出　　处：《宽厚板》2022年第2期16-20,共5页Wide and Heavy Plate

摘　　要：基于氧化物冶金技术,针对3种不同脱氧方式工业化生产EH40试验钢,通过Gleeble 3800热模拟试验机进行焊接热模拟试验,焊接热输入量最大为300 kJ/cm。力学性能检测和组织观察表明:EH40钢母材具有良好强韧性,显微组织主要由铁素体和粒状贝氏体组成;焊接接头热影响区-20℃的KV_(2)>130 J,组织为针状铁素体和少量粒状贝氏体,产品综合性能优良。Based on oxide metallurgy technology,welding thermal simulation test is performed on EH40 test steel industrially produced by three deoxydization modes by Gleeble 3800 thermal simulator with max.welding heat input of 300 kJ/cm.The results of mechanical properties and microstructure observation show that the EH40 steel base material possesses good strength and toughness,the microstructure mainly comprises of ferrite and granular bainite,while at the HAZ of welded joint,KV_(2) at-20℃is over 130 J,the microstructure consists of acicular ferrite and little granular bainite,the product has excellent comprehensive properties.

关 键 词：氧化物冶金 焊接热模拟 针状铁素体 低温韧性 

分 类 号：U671.83[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]