In the field of thermal management, welding is not merely a means of joining—it defines the limits of performance.
Unlike traditional soldering methods, which suffer from uneven flow, porosity, and slag inclusion, we use molecular-level diffusion brazing in a vacuum environment to build cooling circulation systems for your power electronics, aerospace, and new energy vehicle products that remain leak-free for life and offer mirror-like thermal conductivity.
—Vacuum brazing solutions specifically designed for high-precision tubing and liquid-cooled heat sinks
Flatness ≤ 0.15 mm/m² (meets precision bonding requirements)
Leak rate ≤ 1.0×10⁻⁹ Pa·m³/s (helium mass spectrometer leak detection standard)
Challenge 1: Internal Oxidation and Weld Slag Residue → Blocked Flow Channels
Vacuum Brazing Solution: The entire process is conducted in a high-vacuum environment of 10−3 to 10−3 Pa, free of oxygen and flux. After brazing, the inner walls remain as smooth as new, eliminating the need for secondary cleaning and directly mitigating the risk of coolant crystallization.
Challenge 2: Deformation of Large-Area Thin Sheets → Drastic Increase in Thermal Resistance
Vacuum Brazing Solution: Uniform radiant heating inside the furnace, combined with custom graphite/metal fixtures, allows for synchronized release of thermal stress, ensuring micron-level surface contact between the heat sink and IGBT/chip modules.
Challenge ③: Melting or cold joints at tube-to-tube sheet connections → High-pressure leakage
Vacuum brazing solution: Precise temperature control within ±2°C allows the filler metal’s capillary action to automatically fill the gap between the tube nozzle and the base plate, forming a metallically bonded fillet joint that increases pressure resistance by 300% (compared to manual flame brazing).
| Base Material Types | Recommended Filler Metals | Key Advantages (for Heat Dissipation Applications) |
|---|---|---|
| Aluminum Alloys (Series 3/Series 6/Cast Aluminum) | Al-Si (4047/4045) Magnesium-Based Brazing Alloy | Excellent resistance to electrochemical corrosion; suitable for water-cooled or ethylene glycol coolant environments |
| Copper/Oxygen-Free Copper (C10200) | Phosphor Bronze (BCuP) or Silver-Based (BAg) | Thermal conductivity up to 400 W/m·K, specifically designed for high-power laser cooling |
| Stainless Steel (304/316L) | Nickel-based (BNi-2/BNi-5) | Resistant to high temperatures and pressures; suitable for aerospace hydraulic lines and extreme operating conditions |
| Copper-Aluminum Dissimilar Metal Welding | Specialized Al-Cu composite brazing layer | Eliminates galvanic corrosion, achieving the perfect balance between lightweight design and thermal conductivity |
We provide vacuum-brazed finished and semi-finished products—including pipes and heat spreaders—for the following sectors:
New Energy Vehicles: Water-cooled plates for power batteries, heat sink substrates for motor controllers, and chiller cold plates.
Power Electronics: IGBT finned heat sink plates, photovoltaic inverter heat pipe manifolds, and high-voltage direct current transmission valve cooling systems.
RF and Microwave: Liquid-cooled piping for power amplifier modules and phased array radar antenna heat sink plates.
Aerospace: Fuel heat exchangers, avionics heat sink plates, and titanium alloy duct assemblies.
We provide thermal management solutions for industries such as AI computing, data centers, and renewable energy. If you have any questions, would like a quote, or are interested in technical collaboration, please contact us.
