Development of a new nickel-based alloy ERNiCrFe-13 strip electrode surfacing material
[Objective]At present,the new generation of nuclear power equipment manufacturing in China puts forward higher requirements for surfacing metal properties of nickel-based alloy,and the internationally used 690 alloy ERNiCrFe-7A surfacing material with electrode has been difficult to meet the requirements of high temperature strength at 350℃ and low DDC(Ductility dip cracking)sensitivity.[Methods]Through the analysis of the functions of various elements in 690 alloy,the influence factors of DDC resistance of 690 alloy were determined.[Results]Based on the composition of 690 alloy ERNiCrFe-13,WHDNi693 welding strip was trial-produced,and the matching submerged arc welding flux WSJ693HR was successfully developed.According to the welding materials developed above,the process evaluation experiment of surfacing with electrode was carried out.[Conclusion]The new nickel-based alloy ERNiCrFe-13 surfacing with electrode had excellent mechanical properties,corrosion resistance and DDC resistance.
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