Unfortunately, as mentioned earlier, all of these temperature-lowering, eutectic-forming elements in nickel-based BFMs are also hardeners; that is, the phase structures resulting from solidification of these elements have virtually zero ductility. Thus, the last phases to solidify (in the center of the joint) will be hard and non-ductile.

SECO/WARWICK received an order from an international company in the automotive industry for an EV/CAB (electric vehicle/controlled-atmosphere brazing) line. The system, which is designed to braze car battery coolers for the EV industry, will be installed at a newly established factory in Mexico. The EV/CAB line includes a brazing furnace, convection preheating chamber, cooling chamber with air jacket, final cooling chamber and control system. The furnace was designed specifically for the production of oversized battery coolers. The key to successful production is the perfect temperature uniformity on the 75-inch-wide (1,900-mm-wide) belt and the design of the curtain and cooling chambers.

Nickel brazing is unique in the brazing world in that each of the nickel-based brazing filler metals (BFMs) available for use today depends on the use of temperature-lowering ingredients (i.e., temperature-depressants) such as boron, phosphorus and/or silicon to enable the BFM’s usefulness for joining stainless steels and many other superalloys for critical aerospace applications.  

Solar Atmospheres is one of the world’s largest providers of commercial vacuum heat-treating services. Solar’s thermal processing produces bright, scale-free parts with minimal distortion.

This concludes our step-by-step discussion that we began last time.

Question: What is a good method to attach a large sheet of honeycomb material around the entire outside diameter (OD) of a large 304L stainless steel cylinder so that it can be effectively brazed in place around that OD?

Nickel-brazing is unique in the brazing world in that each of the nickel-based brazing filler metals (BFMs) available for use today depends on the use of temperature-lowering ingredients (i.e., temperature-depressants) such as boron, phosphorus and/or silicon to enable the BFM’s usefulness for joining stainless steels and many other superalloys for critical aerospace applications.  

Dan Kay's blog series on eliminating "holds" in brazing cycles continues.

Dan Kay's blog series on eliminating "holds" in brazing cycles continues.

Brazing is a metal-joining process. Metal joining is necessary when parts are too complex to be cost-effectively manufactured from a single piece of material. How does brazing differ from soldering or welding? How does brazing make good things? Let’s find out.