Introduction：

The vacuum brazing process involves using a solid or liquid brazing filler metal with a lower melting point than the base metal under vacuum heating conditions.It forms a strong bond by filling the tiny gaps between workpieces through the capillary action of these gaps. Vacuum brazing furnaces are widely used in electronics, chemical engineering, petroleum, medical equipment, tool manufacturing, and automobile manufacturing.

High-temperature vacuum brazing is mainly applied to the welding of various stainless steel plate heat exchangers, titanium alloy plate heat exchangers, automotive EGR (Exhaust Gas Recirculation) components, diamond tools, superalloys, and other heat-resistant alloys. Additionally, vacuum brazing technology is also extensively used in the manufacturing of structural components such as honeycomb sandwich panels, metal filters, and waveguides.

Main Advantage

1.It is suitable for brazing stainless steel and superalloys, especially heat-resistant alloys with high aluminum and titanium contents, enabling excellent brazing quality. It is also applicable to the welding of homogeneous refractory alloys such as titanium, zirconium, niobium, molybdenum, tungsten, tantalum, as well as dissimilar metals.

2.During the heating process, parts are in a vacuum environment, preventing phenomena such as oxidation, carburization,decarburization,contamination,and deterioration. Additionally, the parts are heated uniformly as a whole, resulting in low thermal stress, which allows the deformation to be controlled to the minimum extent.

3.The base metal and brazing filler metal are in a low-pressure environment, which can eliminate volatile impurities and gases released by the metal at the brazing temperature, and the performance of the base metal itself is also improved.

4.Vacuum brazing does not require flux, thus avoiding defects such as pores and slag inclusions. It also eliminates the need for post-brazing cleaning procedures, saving time and improving working conditions. Therefore, the heat treatment process of parts can be carried out together with vacuum brazing, and brazing can also be arranged as the final process.

5.Parts after vacuum brazing have a clean and bright surface, making it easy to inspect the quality of the brazed joints.

6.It can braze multiple adjacent brazed joints, and depending on the furnace capacity, multiple components can be brazed in the same furnace, making it an efficient brazing method.

Related Configuration

1.Heating Chamber

lHeating Chamber : Circular

lHeating Element：Graphite / Molybdneum

The heating chamber consists of a stainless steel frame, heat insulation layer, heating elements, insulation parts, and a furnace bed. According to customer requirements, heating elements are made of different materials for various scenarios, with a maximum operating temperature of up to 1300℃ and excellent furnace temperature uniformity.

2.Vacuum system

Well-known domestic and foreign vacuum pump brands, such as EVP, Leybold, etc., are matched according to customer needs.

3.Control system

The equipment’s PLC and electrical components utilize a SIEMENS S7-1200 programmable controller, capable of detecting and issuing alarms for any anomalies during operation, enabling fully automated control.

The temperature controller is an internationally renowned Eurotherm temperature controller. Its control accuracy reaches ±0.5‰ F.S. It offers a wide range of functions, including no fewer than 20 (expandable) temperature/time settings, intelligent PID control, and automatic switching of heating control channels.

All low-voltage components are Siemens, and terminals are from international brands such as Phoenix Contact. Their quality, performance, and workmanship are highly reliable, minimizing control system failure rates.

Technical Parameter：

After-Sales and Acceptance Services

After the completion of production, the manufacturing plant will conduct  factory acceptance test, including:

1.Ultimate vacuum test

2.Pressure rise rate test

3.Inspection of the completeness of all equipment systems

After the equipment is delivered to the user’s site, site acceptance test will be carried out, including:

1.Overall installation

2.Overall debugging

3.User training

4.Document handover

Warranty

The warranty period is one year from the date of final acceptance. It covers non-human-damaged components (excluding consumables/wear parts), as well as manual maintenance services and transportation costs incurred during the warranty period.