Abstract

Similar Plates of stainless steel (AISI 316L) and dissimilar plates of
stainless steel (AISI 316L) and low carbon steel (Ck15) are welded by brazing
using copper base non- active filler metal alloys in furnaces with inert gas
atmospheres The specimens were inserted in special container called (Retort) filled
by inert gas(argon) during brazing process with flow rate (1-2 litter / min). Three
types of filler metal alloys DINL- Ag20Cd , AWSRB CuZn-C , AWS RB Cu Zn –
D were used with changing the brazing time (5 , 10) min at given temperature
suitable for each filler metal alloy . Many or various mechanical and metallurgical
tests were carried out including single shear test, double shear test and tensile shear
test, in addition to the microstructure and x-ray diffraction inspection for each
similar and dissimilar welds. It was shown that single and double butt joints of the similar metals of stainless steel (316L) showed higher shear strength than that of
dissimilar weld of stainless steel (316L) and Low carbon steel( CK15) . The
brazed joints by filler metal alloy (RBCu Zn-D) showed the best shear strength for
similar and dissimilar metal of stainless steel (316L)and low c brazing time arbon
steel (Ck15) in comparison with joints brazed by other filler metal alloys at
(5, 10) min .