电焊机2024，Vol.54Issue(2)：37-43,7.DOI:10.7512/j.issn.1001-2303.2024.02.06
超大线能量焊接用EH36厚钢板的开发及其焊接试验
Development of EH36 Thick Plate for Large Heat-input Welding and its Welding Properties
摘要
Abstract
In the fields of large-scale construction,bridges,shipbuilding,and heavy machinery,welding of thick steel plates is often required,and problems such as low welding efficiency and unstable welding quality may be encountered using con-ventional welding methods.An EH36 steel plate(80 mm thick)for large wire energy welding was developed,and a large wire energy welding test was carried out by using dual-wire gas-electric riser welding with 532 kJ/cm heat-input.The results show that after the large wire energy welding thermal cycle,the coarse grain heat-affected zone is inevitably coarsened,the average grain size of the original austenite is 312 μm,and through the uniform distribution of the composite oxide inclusions induced,the intracrystalline can be formed into the organization type of acicular ferrite dominated + a small amount of lat-eral lath ferrite,so that the coarse grain zone can obtain a more desirable level of toughness.Among them,under the condi-tion of-20℃,the fusion line impact work of steel plate thickness center is 70～269 J,with an average value of 179 J;under the condition of-40℃,the fusion line impact work of steel plate thickness center is 50～216 J,with an average value of 115 J.The impact performance of welded joints is good in all positions,which meets the requirements of impact perfor-mance of welded joints of EH36 steel plate.关键词
大线能量焊接/EH36钢板/双丝气电立焊/冲击功/氧化物夹杂Key words
large heat-input welding/EH36 steel/double wire gas electric vertical welding/impact energy/oxide inclusion分类
矿业与冶金引用本文复制引用
曲之国,王东明,赵和明,杨海峰,张友建,王立志..超大线能量焊接用EH36厚钢板的开发及其焊接试验[J].电焊机,2024,54(2):37-43,7.基金项目
辽宁省2019年科技重大专项(2019JH1/10100014) （2019JH1/10100014）
