NICKEL-CHROME BASE HARD SOLDERS Russian patent published in 2001 - IPC

FIELD: soldering materials. SUBSTANCE: hard solder is in the form of alloy being glassy by 80%; its content is determined according to given formula Cr_aFe_bSi_cB_dMo_eNi_therest, where at.%: a, 9.5 -16.6; b, 0-5; c, 10-15; d, 6-7; e, 0-5; nickel, the balance. Solder may be prepared in the form of homogeneous plate foil. Soldered article is made by method comprising steps of making homogeneous plate foil from melt composition containing, at.%: a, 9.5-16.6; b, 0-5; c, 10-15; d, 6-7; e, 0-5; nickel, the balance; at quickly cooling melt onto cooled surface moving with predetermined rate; placing solder between parts of base metal for making united blank; heating united blank and keeping it at predetermined temperature during time period sufficient for dissolution of fragile intermetallic phases formed at soldering; cooling approximately until 1000 C with subsequent soaking at above mentioned temperature for time period sufficient for annealing structure after soldering. Solders feature high strength, ductility, fatigue and corrosion resistance. Soldered article is free from fragile intermetallic compounds. EFFECT: enhanced quality of soldered articles. 8 cl, 1 dwg, 3 tbl