电焊机2017，Vol.47Issue(6)：63-68,6.DOI:10.7512/j.issn.1001-2303.2017.06.14
14Cr9Mo1.5Co1.2VNbNB双钨极氩弧焊堆焊接头成分和性能
Composition and properties of twin-electrode TIG surfacing joints for 14Cr9Mo1.5Co1.2VNbNB
王红海 1张仁军 1吴海涛1
作者信息
- 1. 哈尔滨汽轮机厂有限责任公司,黑龙江哈尔滨150046
- 折叠
摘要
Abstract
A twin-electrode TIG welding (D-TIG) is used to weld the 14CrgMo1.5Co1.2VNb 2NB steel (FB2) for a ultra-supercritical steam turbine rotor,chemical study and hardness measurement are used to measure the chemical component and hardness of FB2 with different thicknesses and analyze their change rule.Microstructure of surfacing joints is observed and analyzed by OM (optical microscope),and NDT (nondestructive testing) and mechanics performance testing are carried out.The results show that under the condition of different surfacing plans,the chemical component of deposited metal in surfacing layer gradually approximate to that of welding wire as the thickness of surfacing layer increases,the HAZ (heat affected zone) hardness is high and gradually uniform when it reach the thickness of surfacing layer.The metallograph shows that there is no crack on the welds.The NDT and mechanical property of sudacing joints can meet the performance requirements of the steam turbine rotor.关键词
14Cr9Mo1.5Co1.2VNbNB/双钨极氩弧焊/化学成分/硬度/力学性能Key words
14Cr9Mo1.5Co1.2VNbNB/twin-electrode TIG welding/chemical component/hardness/mechanical property分类
矿业与冶金引用本文复制引用
王红海,张仁军,吴海涛..14Cr9Mo1.5Co1.2VNbNB双钨极氩弧焊堆焊接头成分和性能[J].电焊机,2017,47(6):63-68,6.
