CLAM-316L TIG焊接接头显微组织特征分析  

Microstructure properties of CLAM/316L TIG welded joint

作　　者：张俊钰[1,2] 吴庆生[2] 黄波[2] 李春京[2] 黄群英[2] 无 ZHANG Jun-yu WU Qing-sheng HUANG Bo LI Chun-jing HUANG Qun-ying FDS Team(University of Science and Technology of China, Hefei of Anhui Prov. 230027, China Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei of Anhui Prov. 230032, China)

机构地区：[1]中国科学技术大学,安徽合肥230027 [2]中国科学院核能安全技术研究所,中国科学院中子输运理论与辐射安全重点实验室,安徽合肥230032 [3]FDS团队

出　　处：《核科学与工程》2016年第4期492-496,共5页Nuclear Science and Engineering

基　　金：国家自然科学基金(2013GB108005,2014GB112003);中科院知识创新项目(KJCX2-YW-N35)

摘　　要：采用309焊丝对中国低活化马氏体(CLAM)钢和316L不锈钢进行TIG焊,并利用光学显微镜、扫描电镜和维氏硬度仪分析对接接头的微观组织和显微硬度分布。结果表明,CLAM-316L TIG焊接头按照显微组织特征可分为六个区域,即CLAM钢母材、CLAM钢热影响区、CLAM钢熔合区、焊缝金属、316L热影响区、316L母材。CLAM钢熔合区显微组织为淬火马氏体;焊缝金属区为粗大的胞状枝晶组织;316L热影响区和母材均为奥氏体组织,热影响区晶粒尺寸有明显长大。焊态接头整体硬度分布均匀,只有CLAM钢熔合区硬度较高。The CLAM-316 Ldissimilar metal joints were welded by Tungsten Inert Gas（TIG）welding using 309 austenite steel as filler material.The microstructure and microhardness distribution of the butt welds were investigated.According to the microstructure characteristics,the joint can be divided into six regions,CLAM base metal（BM）,CLAM heat affected zone（HAZ）,CLAM fusion zone（FZ）,weld metal（WM）,316 LHAZ,316LBM.The CLAM BM was composed of quenched martensite.The WM consisted of cellular dendrite.Both the HAZ and BM of 316 Lsteel were composed of austenite,but the grain size increasing occurred in the 316 L HAZ.The overall hardness distribution in the transverse direction of the joints was homogeneous,except the CLAM FZ with a higher hardness.

关 键 词：聚变堆 CLAM钢 异种钢焊接 TIG焊 

分 类 号：TG407[金属学及工艺—焊接]