Brazing by Mel M. Schwartz

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 realized on tooling, layout, fabrics, atmospheres, processing, and gear. For brazing technologists and engineers. past variation: c1987. DLC: Brazing.

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Extra resources for Brazing

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Flux is normally required with the process. An exception is the joining of pure copper base metal with phosphorus-bearing filler metal. The phosphorus joins with the oxides on the surface to promote wetting of the filler metal. Torch brazing is widely used because of its relatively low cost and portability. The flame is generated by the combustion of a combination of oxygen and a fuel gas. The same equipment can be used as with oxyfuel gas welding. The process lends itself to the use of low-melting filler metals, which have excellent flow characteristics.

02 Absorbed energy, KW/kg of base material 315 Alu Absorbed energy, kW/lb of base material 0 95 flake off. Critical to the success of the process is how the flux is applied and the amount that is applied (neither too little nor too much). Sometimes, it is possible to eliminate flux by using a controlled atmosphere (hydrogen-nitrogen-argon), which prevents oxidation. In brazing copper (and copper alloys), use can be made of silver-copper-phosphorus alloys. These alloys do not require flux; the phosphorus acts as a flux.

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 ... Same as 5 plus titanium, zirconium, hafnium Same as 3 Same as 5 plus cobalt, chromium, tungsten alloys, and carbides(e) Brasses Same as 4 Same as 3 Copper(c), brass(b), low-carbon steel, nickel, Monel, mediumcarbon steel(d) Same as 2 plus medium- and highcarbon steels, Monel, nickel alloys Same as 2 plus medium- and highcarbon steels Same as 1–4 plus alloys containing chromium(e) Copper, brass Base metals ...

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