EFFECT OF Fe_2O_3 ON WELDING TECHNOLOGY AND MECHANICAL PROPERTIES OF WELD METAL DEPOSITED BY SELF-SHIELDED FLUX CORED WIRE  

作　　者：YuPing PanChuan XueJin LiZhengbang 

机构地区：[1]DepartmentofWeldingResearch,CentralIronandSteelResearchInstitute,Beijing100081,China [2]SchoolofMaterialsScienceandEngineering,Xi＇anjiaotongUniversity,Xi＇an710049,China [3]DepartmentofMetallurgicalTechnology,CentralIronandSteelResearchInstitute,Beijing100081,China

出　　处：《Chinese Journal of Mechanical Engineering》2005年第1期55-57,共3页中国机械工程学报（英文版）

摘　　要：Five experimental self-shielded flux cored wires are fabricated withdifferent amount of Fe_2O_3 in the flux. The effect of Fe_2O_3 on welding technology and mechanicalproperties of weld metals deposited by these wires are studied. The results show that with theincrease of Fe_2O_3 in the mix, the melting point of the pretreated mix is increased. LiBaF_3 andBaFe_(12)O_(19), which are very low in inherent moisture, are formed after the pretreatment. Themechanical properties are evaluated to the weld metals. The low temperature notch toughness of theweld metals is increased linearly with the Fe_2O_3 content in the flux due to the balance betweenFe_2O_3 and residual Al in the weld metal. The optimum Fe_2O_3 content in flux is 2.5 percent approx3.5 percent.Five experimental self-shielded flux cored wires are fabricated withdifferent amount of Fe_2O_3 in the flux. The effect of Fe_2O_3 on welding technology and mechanicalproperties of weld metals deposited by these wires are studied. The results show that with theincrease of Fe_2O_3 in the mix, the melting point of the pretreated mix is increased. LiBaF_3 andBaFe_(12)O_(19), which are very low in inherent moisture, are formed after the pretreatment. Themechanical properties are evaluated to the weld metals. The low temperature notch toughness of theweld metals is increased linearly with the Fe_2O_3 content in the flux due to the balance betweenFe_2O_3 and residual Al in the weld metal. The optimum Fe_2O_3 content in flux is 2.5 percent approx3.5 percent.

关 键 词：Self-shielded flux arc welding Fe_2O_3 Welding technology Mechanicalproperties 

分 类 号：TG444[金属学及工艺—焊接]