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分析了离心铸造HP-Nb高温合金的焊接性,采用R-Ni镍基焊丝手工TIG焊打底、R-P_2专用焊丝手工TIG焊填充和全位置自动管焊机TIG盖面的焊接工艺,焊接了外径127mm、壁厚10mm的离心铸造HP-Nb高温合金炉管对接接头,并对焊接接头进行了常温和高温机械性能测试和微观组织分析。
The weldability of HP-Nb superalloy prepared by centrifugal casting was analyzed. The surface of the HP-Nb superalloy was welded with R-Ni Ni-based welding wire, TIG welding with R-P 2 special wire and TIG welding with full- Centrifugal cast HP-Nb superalloy pipe butt joint with external diameter of 127mm and wall thickness of 10mm was used to test the mechanical properties and microstructure of the welded joint at ambient temperature and high temperature.