镍基合金的药芯焊丝气体保护焊工艺评定

Assessment of FCAW-G Welding Process of Ni-based Alloys

采用药芯焊丝气体保护焊(FCAW-G)对UNS N10276及UNS N06625两种镍基合金进行了焊接工艺研究,按照NB/T47014-2011对两副试板进行焊接工艺评定,对焊接接头的拉伸、弯曲性能、硬度、化学成分及耐蚀性能进行了检测。试验结果表明,选用型号为ENiCrMo4T1-4和ENiCrMo3T1-4的药芯焊丝,采用80%Ar+20%CO_(2)混合保护气,可以分别实现UNSN10276及UNS N06625镍基合金的焊接,且焊接接头具有较好的塑韧性及拉伸强度,并能够满足标准对镍基合金材料耐蚀性能的要求。该研究对镍基合金药芯焊丝气体保护焊在有色金属压力容器制造上的推广应用有积极意义。

The welding process of UNS N10276 and UNS N06625 nickel-based alloys were studied by using flux-cored wire gas metal arc welding(FCAW-G).The welding procedure qualification for two pairs of test plates were carried out according to NB/T47014-2011.The tensile,bending performance,hardness,chemical composition and corrosion resistance of the welded joints were tested.The test results show that UNS N10276 and UNS N06625 nickel-based alloys can be welded well by using the flux-cored wires of ENiCrMo4T1-4 and ENiCrMo3T1-4 respectively under 80%Ar+20%CO_(2)mixed shielding gas.The welded joints have good plastic toughness and tensile strength.The joint performance can meet the standard requirements of corrosion resistance of nickel-based alloy materials.The research has positive significance for the application of nickel-based alloy FCAW-G in the manufacture of non-ferrous metal pressure vessels.