ABSTRACT
Figure 3 Pb-Ba phase diagram [2,53,64a]. (Courtesy of ASM International, Materials Park, Ohio, and Springer Verlag, New York.)
Table 2 Brinell Hardness After Quenching and Aging at Room Temperature for 35 Days (Determined from Figure 4)
Wt.% Ba Hb (2 mm/15.6 kg/30 s) Aging time (days)
0.015 4.5
0.024 8.0
0.024 15.5 36
0.14 0.14 17.5 7 35 7
0.58 15 7
Figure 4 Hardness versus ageing time for Pb-Ba alloys [2,65]. (Courtesy of Springer Verlag, New York.)
tion, no intense grain growth relative to pure lead is observed [2]. Whereas Bi addition has very little influence on mechanical properties, excellent wetting properties make Pb-Bi alloys very valuable as solders for glass-to-metal joints. Their desirable solidification shrinkage characteristics and casting properties that provide an ability to reproduce surface details make them useful in printing and prototyping applications. Molten Pb-Bi alloys are used for heat treatment and in other heat-transfer applications. Small additions are used in type metals and bearing metals based on Pb-Sb-Sn for improved casting properties.
