Thin Wall Component BNi?2 Powderfor Brazing Service
Clean parts, dry powder, correct clearance, and a controlledvacuum/protective atmosphere decide whether the joint is excellentor rejected.
Rite Material ? — Precision Powder, Reliable Bonds.
*Tips provided by Rite Material*
1. BNi?2 powder must be brazed under vacuum or high-purity inertatmosphere. Air brazing will cause severe oxidation and failedjoints.
2. Strictly control the joint clearance within 0.03–0.10 mm. Toolarge gaps easily generate brittle boride phases and reduce jointstrength.
Why choose it
Lower boron content → less brittle phase formation, better jointductility
Wider melting range → more forgiving with larger or less-precisejoint clearances (0.05–0.15 mm)
Reduced boron penetration into base metal → less risk of base-metalembrittlement
More tolerant of minor process variations
Best for:? Wider-clearance joints, applications re morepost-braze ductility, situations where boron penetration into theparent metal is a concern, components needing thermal-fatigueresistanceRite Material
BNi-2? = chromium-bearing, oxidation resistant, the industrydefault.
BNi-3? = chromium-free, flows into the tightest gaps, tolerant ofimperfect atmospheres.
BNi-4? = lower boron, wider gap tolerance, better ductility, higherbrazing temperature.
1. BNi?2 powder must be brazed under vacuum or high-purity inertatmosphere. Air brazing will cause severe oxidation and failedjoints.
2. Strictly control the joint clearance within 0.03–0.10 mm. Toolarge gaps easily generate brittle boride phases and reduce jointstrength.
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
Diffusion Treatable BNi?2 Nickel Brazing Powder