Effect of Filler Metal on the Electron Beam Welds of Sintered Steel and/or Stainless Sintered Steel (Part 1)

Abstract

This paper presents some experimental data concerning the effects of SUS308L stainless steel filler and/or A5183 aluminum alloy filler on 0.2 % carbon sintered steel welds and SUS304L stainless sintered steel welds by electron beam maintaining heat input per unit length constant. As the results, we can clearly observe that porosity formation was reduced owing to the deoxydizing action of chromium or aluminum at the welded joint. In addition, it was found that use of low welding speed was important in attaining porosityfree welds even if the filler metal was used.
In case of SUS304L stainless sintered steel weld, the porosity formation was not reduced by aluminum alloy filler metal and the necklace crack, a kind of cold shuts, were observed under the special welding condition. X-ray micro-analyser was used to detect chromium and nickel trace which were contained in SUS308L stainless steel filler at the fused area of sintered steel.