Determination of C,Mn,Si,P and S in Melt of Flux-Cored Welding Rod by Direct-Reading Spectrography

Contents of C,Mn,Si,P and S in melt metal of flux-cored welding rod were determined by vacuum direct-reading spectrography with the pulse distribution analysis method.Low alloy steel (09MnNb) was chosen as control sample;and influential factors of standardized coefficient and spectral intensity of internal element were discussed.The proposed method was applied to analysis of sample of the melt of flux-cored wire,and the results obtained were in conformity with those by ICP-AES (for Mn,Si and P) by HFIF-combustion-IR absorption method for C and S.