The pursue of the business, is definitely the clients' gratification for Vc Heat Sink, Vapor Chamber Heatsink, Heat Sink with Copper Heat Pipe. We strive to achieve greater breakthroughs in performance, and strongly promote project operations and focus on building the company's image project. Focusing on our innovation and development tasks, we take the strivers as the basis and vigorously strengthen the construction of our staff team. Our company adhere to the customer first, quality first, reputation first, service first.
Brazing
Brazing is the jointing of metals using a molten filler material, which on cooling forms a joint.
The filler metal melting temperature is above 450℃, but below the melting point of the metals.
How does it work?
Brazing joints the base metals by creating a metallurgical bond between the filler metal and the base metals.
When molten, the filler metal is drawn into the joint by capillary action.

How do you supply filler metal to 100's of joint simultaneously?
Brazing sheet!

Aluminum oxide
Aluminum oxide characteristics:
Hardness significantly above 400Mpa
High resistance to chemicals
The oxide interferes with brazing
Aluminum owes many of its properties to very strong adherent oxide film on the surface.
This oxide must be removed or broken up if joining is to occur.
There are a number of possibilities of achieving this.

Comparison of brazing processes:
CAB | Vacuum brazing | Air furnace brazing | |
Heating | Radiation/Convection | Radiation | Forced convection |
Use of flux | Yes | NO | NO |
Quantity of flux | <5g/㎡ | - | 30~50g/m³ |
Pre braze treatment | Moderate demands | High demands | Moderate demands |
Post braze treatment | NO | NO | Yes |
Aqueous wastes | NO | Yes | |
Atmospheric emissions | NO | NO | NO |
Continuos process | Yes | NO | Yes |
Investment | 80 | 100 | 90 |
Operating expense | 80 | 100 | 100 |
CAB furnace brazing process sequence
The CAB process sequence is depending on: Heat exchanger design, Cleaning method, Flux application method.

CAB furnace braze cycle

Factors determining CAB production success or failure
1. Good product fit-up ( gap tolerance 0.1 to 0.15mm)
2. Adequate quantity of filler metal
3. Uniformity of flux coating
4. Interaction of flux and alloying elements
5. Furnace conditions (temperature time profile, temperature uniformity, furnace atmosphere)

We have always taken it as our responsibility to provide customers with quality Refrigeration Equipment Brazed Plate Heat Exchanger for Cold Room and good services, and have received many awards from the community. Our company pursues the concept of 'integrity, innovation, gratitude'and we hope to give back to the society and customers. While accelerating business development and promoting business prosperity, our company strives to build the company into a highland of talents.
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