High Pressure Part BNi?2 Powderfor Brazing Joints
Degrease with acetone or suitable solvent
Remove scale, oxide, and fingerprints
Even tiny oil traces can cause voids, skipping, or weak joints
3. Use the right atmosphere
BNi-2 is made for vacuum, high-purity argon, or very dryhydrogen.
Air furnaces are not recommended
Poor atmosphere → chromium oxidation, black joints, poorwetting
No flux needed in vacuum brazing
Heat resistance?
Joints remain stable in high-temperature service
Oxidation / corrosion resistance? Cr-bearing joint for demandingenvironments
Versatile base metals?
Stainless steel, Ni superalloys, Co alloys, hardmetals, diamondtools
Vacuum / protective atmosphere friendly? No flux needed in vacuumor pure argon / dry H?
Customizable powder specs? Mesh, oxygen level, sphericity,packaging
Typical Applications
Aerospace:? turbine vanes, honeycomb seals, engine staticstructures, guide vanes
Heat exchangers:? plate-fin, stainless steel, EGR coolers,microchannel reactors
Energy / turbines:? gas turbine parts, combustor components,nuclear non-core hardware
Automotive:? turbochargers, exhaust components, stainless coolingsystems
Tooling:? diamond saw blades, grinding tools, tungsten carbideinsertsRite Material
3. High-temperature joint strength
After brazing — especially with a diffusion hold — BNi-2 jointsshow:
high room-temperature strength
retained strength at elevated temperature
good creep resistance
remelt temperature higher than the original liquidus afterboron/silicon diffusion
3. Thoroughly clean the workpiece faying surface to remove grease,oxide and fingerprints. Contamination leads to poor wetting andvoids.
4. For brazing paste, complete low-temperature drying and binderburnout before high-temperature heating to oid pores from organicdecomposition.
5. Control brazing temperature at 1050–1100 °C with proper holdingtime. Excessive holding will induce boron diffusion and embrittlethin base materials.
6. Use molybdenum or ceramic fixtures. Avoid common metal fixturesthat may react with workpieces at high temperatures.
7. Store BNi?2 powder in sealed, dry packaging to prevent moistureabsorption and surface oxidation.
8. Wear protective masks and gloves when handling powder to oidinhalation and direct skin contact.Rite Material
Low Brittle Phase BNi?2 Powder for Diffusion Braze