By Mel M. Schwartz
Textual content presents info had to braze fabrics that may be utilized in the twenty first century. Revised to incorporate classes discovered on tooling, layout, fabrics, atmospheres, processing, and kit. For brazing technologists and engineers. earlier version: c1987. DLC: Brazing.
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Extra info for Brazing
The innovative design of the hydrogenatmosphere hump mesh-belt furnace system has produced parts such as those shown in Fig. 5. 26 / Brazing, Second Edition Innovative designs such as this continue to provide insight into the advanced technology being made available to the thermal processing industry and display the potential for development of advanced materials processing systems (Ref 6). A second type of semicontinuous controlledatmosphere brazing (CAB) furnace is shown in Fig. 6. This type of furnace was designed for brazing aluminum heat exchangers.
100 ... 70–97 70–99 25 41–45 73–75 70–71 87 N2 ... ... ... ... ... 1–10 ... 17–19 10–11 9–10 5–1 CO ... ... ... ... ... ... ... 5–6 11–12 CO2 Composition of atmosphere, % BNi, BAu, BAlSi, titanium alloys BCu, BAg BCu, BAg BCuP, BAg ... Same as 5 BAg Same as 5 Same as 5 Same as 5 BAg(b), BCuP, RBCuZn(b), BCu, BNi Same as 5 Same as 2 Same as 2 BCu, BAg(b), RBCuZn, BCuP BAg(b), BCuP, RBCuZn(b) Filler metal Heat- and corrosion-resisting steels, aluminum, titanium, zirconium, refactory metals Carbon and low-alloy steels, copper Low-carbon steels, copper Copper ...
To quench the workpiece after brazing, backfill inert gases flow into the furnace. The backfill gases used are argon, nitrogen (except if base materials contain titanium, beryllium, zirconium, or aluminum), helium, and hydrogen. There are two preferred methods that are used for back filling: • With an internal gas-quenching setup, inert gases flow into a plenum behind the insulated hot furnace zone. Baffles and nozzles direct 32 / Brazing, Second Edition the gas toward the brazement, and hot gases recirculate through a heat exchanger that cools the gas and redirects it to the work.
Brazing by Mel M. Schwartz