采用“铁研试验”、力学性能试验和金相试验等，研究了药芯焊丝（ＥＦ０３５０４１）ＣＯ２气体保护焊条件下，ＨＱ１３０＋ＱＪ６３高强度异种钢焊接接头的组织性能，并与实芯焊丝（Ｈ０８Ｍｎ２ＳｉＡ）ＣＯ２焊的焊接接头性能进行了比较。结果表明：由于药芯焊丝采用气－渣联合保护，合金元素烧损少、焊缝金属抗裂性好，焊缝拉伸强度、冷弯角超过实芯焊丝焊缝。因此，采用药芯焊丝代替实芯焊丝用于工程机械高强钢焊接中可提高生产率、降低焊接成本，具有重大的社会经济效益。 The microstructure and mechanical properties of HQ130 + QJ63 high-strength dissimilar steel welded joints under flux-cored wire (EF035041) CO2 gas shielded welding were studied by means of “iron study”, mechanical properties test and metallographic test. The properties of the solid wire (H08Mn2SiA) The performance of CO2 welded joints was compared. The results show that due to the gas-slag joint protection, the flux loss of alloying elements is small, the crack resistance of the weld metal is good, the tensile strength and the cold corner of the weld exceed the solid wire weld. Therefore, the use of flux cored wire instead of solid wire for high strength steel welding engineering machinery can improve productivity, reduce welding costs, with significant social and economic benefits.