Vacuum brazing is a process where the temperature varies depending on the materials being brazed.
Typically, it involves temperatures exceeding 1000°C.
Let's break down the specific temperatures for three key materials: aluminum, copper, and stainless steel.
What is the Temperature of Vacuum Brazing? (3 Key Materials Explained)
1. Aluminum and Aluminum Alloys
For aluminum and its alloys, the parts are heated to a range of 575-590°C (1070-1100°F).
The critical temperature uniformity must be within ±5.5°C (±10°F) or better.
This ensures proper bonding without damaging the aluminum components.
Maintaining strict temperature uniformity is crucial for the integrity and strength of the brazed joints.
2. Copper and Copper Alloys
For copper and its alloys, the furnace is heated to a brazing temperature of 1100–1120°C (2000–2050°F).
This is done under an inert-gas partial pressure to inhibit the evaporation of copper.
The higher brazing temperature is necessary due to copper's high vapor pressure at its melting point.
Using an inert gas helps prevent copper evaporation, which could contaminate the furnace and affect the quality of the brazed joints.
3. Stainless Steels
For stainless steels, high-temperature brazing filler metals are used, typically involving temperatures exceeding 1000°C.
These high temperatures are required to effectively melt the brazing filler metals and ensure a strong bond.
The high brazing temperatures also allow for integrating heat treatments into the brazing cycle, enhancing the mechanical properties of the materials.
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