Abstract
In the present work, the applicability of the copper free silver based alloys Ag–15Mn and Ag–5Pd as filler metals for shielding gas brazing of the martensitic stainless steel X3CrNiMo13-4 was investigated. The joints were examined with respect to their microstructure, their corrosion behaviour in aequous NaCl solution as well as – in the case of the specimens brazed with AgPd5 – their mechanical performance under tensile and torsion loading. Specimens brazed with Ag– 15Mn showed pronounced oxidation in the Ar/H2 shielding gas atmosphere as well as a low corrosion resistance in 0 ? 5M NaCl solution. The filler metal Ag–5Pd showed very good brazing results. With this filler metal, defect free and corrosion resistant joints with an ultimate tensile strength of 800 MPa and a low cycle fatigue strength of 490 MPa could be produced.
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