超超临界锅炉用钢Super 304H的焊接工艺  

Study on welding process of Super 304H steel for ultra-supercritical boiler

作　　者：公永建[1] 徐泽宇[2] 丁光柱[3] 

机构地区：[1]河南机电高等专科学校材料工程系,河南新乡453003 [2]郑州大学材料科学与工程学院,河南郑州450001 [3]河南第二火电建设公司,河南郑州454001

出　　处：《电焊机》2015年第6期179-181,共3页Electric Welding Machine

基　　金：2013年河南省教育厅科学技术研究重点资助项目(13A520221)

摘　　要：Super 304H钢是奥氏体型的超超临界锅炉用钢。通过分析Super 304H钢的焊接性能,选用NIBAS70/20-1G焊丝来焊接试板,并评定其焊接工艺。为保证焊接质量,提出坡口打磨、全程持续充氩保护、控制热输入、坡口内加丝等工艺措施来防止出现未熔合、内凹等缺陷,试验数据及工程实践均证明,选用NIBAS 70/20-1G焊丝的钨极氩弧焊工艺可保证Super 304H钢焊接接头的综合力学性能符合要求。The Super 304H steel is austenitic steel used for the uhra-supercritical boiler.According to the analysis of the welding properties of Super 304H steel,NIBAS 70/20-1G wire is used to weld plates and the welding process is evaluated.For the purpose of the good welding quality,technological measures of groove grinding,continuous argon protection in the whole process,heat input control and adding wires in the groove are put forward to prevent the defects,such as incomplete fusion,inner concave and so on.The test data and engineering practice prove that the TIG welding process with NIBAS 70/20-1G wire can guarantee the mechanical properties of the wehted joint of Super 304H steel meet the requirements.

关 键 词：Super 304H钢 NIBAS 70/20-1G焊丝 全程充氩保护 

分 类 号：TG457[金属学及工艺—焊接]