700℃超超临界燃煤锅炉管材焊接接头组织性能分析  

Analysis on Microstructure and Properties of Welded Joints of 700 Ultra Supercritical Coal Fired Boiler Tubes

作　　者：李明扬[1] 叶建水[2] 章清泉[1] 傅祖明[1] 董建新[2] 谢锡善[2] 

机构地区：[1]北京北冶功能材料有限公司,北京100192 [2]北京科技大学,北京100083

出　　处：《金属材料研究》2015年第3期4-10,14,共8页Research on Metallic Materials

摘　　要：本文对比分析了采用美国研制和北京北冶功能材料有限公司（以下简称“北冶公司”）研制的镍基高温合金焊接材料（以下简称“焊丝”）对φ950．8×8mm Inconel 740H合金管材进行手工氩弧焊所制成焊接接头的组织及性能。采用美国和北冶公司焊丝所制成的焊接接头焊件热影响区均无液化裂纹，这是焊接接头质量要求的关键之一。北冶公司的焊丝在焊接过程中金属流动性较美国焊丝好。同时，结晶裂纹敏感性较美国焊丝低，这与严格控制元素含量有关。Microstructure and properties of Inconel 740H alloy tube welded joints made of American and Beijing Beiye founctioal materials corporation （Beiye in short as follows） weld wires by manual argon arc welding were compared and anaylized in this paper. There are no liquation cracking in weld heat-affected zone of these welded joints, which is one of the key quality requirements. The metal mobility and crystal crack sensitivity of Beiye weld wires are better than that of American production, which depands on the content of strict control ele- ments.

关 键 词：超超临界 镍基高温合金焊材 焊接性能 

分 类 号：TG42[金属学及工艺—焊接]