A precision vacuum hot press furnace engineered for titanium alloy, stainless steel and high-value metal assemblies. Built for clean solid-state bonding, vacuum brazing, heat exchanger plates and structural components that require stable temperature, high vacuum and controlled hydraulic pressure.
The VTM platform combines high vacuum, precise thermal control and hydraulic pressure for clean, repeatable diffusion bonding and vacuum brazing of demanding metal assemblies.
Diffusion bonding and vacuum brazing are used when conventional welding may introduce distortion, oxidation, filler contamination or excessive residual stress.
Vacuum environment reduces oxidation and supports clean bonding interfaces for titanium alloy, stainless steel and dissimilar metal assemblies - the core working principle of a vacuum diffusion bonding furnace.
200T hydraulic loading, 100 mm press stroke and precision plate alignment support stacked plates and structural parts.
Suitable for vacuum brazed joints where clean surfaces, controlled heating and low-oxidation processing are critical - see the full vacuum brazing furnace range.
Use this comparison to decide whether vacuum diffusion bonding, traditional welding, or vacuum brazing is the right process for your application.
| Evaluation Dimension | Vacuum Diffusion Bonding | Traditional Argon Arc Welding | Vacuum Brazing |
|---|---|---|---|
| Distortion / Deformation | Almost zero | Visible warping | Almost zero |
| Internal channel / complex geometry | Suitable | Not suitable | Suitable |
| Dissimilar metal joining | Ti+SS, Ti+Ni, etc. | Very limited | Filler-dependent |
| Joint strength | 100% base material | 80-90% base material | Depends on filler |
| Post-join machining required | Minimal | Often required | Minimal |
| Oxidation / contamination | None (vacuum) | Surface oxidation | None (vacuum) |
| Typical applications | Aerospace, heat exchangers, titanium assemblies | Structural steel, thick plates | Heat exchangers, honeycomb panels |
Compare the VTM working-zone options, vacuum performance, thermal capability and hydraulic loading for precision diffusion bonding and vacuum brazing applications.
| Parameter | VTM-555 | VTM-855 | Application Benefit |
|---|---|---|---|
| Furnace type | Horizontal single-chamber, double-door | Vacuum diffusion bonding furnace | Pressure-assisted vacuum joining platform |
| Joining materials | Stainless steel, titanium alloy | Titanium alloy | Titanium, stainless steel, precision alloy assemblies |
| Working vacuum | ≤5.0×10⁻³ Pa | ≤5.0×10⁻³ Pa | High-vacuum thermal joining |
| Pressure rise rate | ≤0.3 Pa/h, measured 0.024 Pa/h | ≤0.3 Pa/h, measured 0.024 Pa/h | Leak-tight chamber performance |
| Maximum temperature | 1200°C | 1200°C | Diffusion bonding and vacuum brazing range |
| Uniform hot zone | 500×500×500 mm | 800×500×500 mm | Small and medium work envelopes |
| Temperature uniformity | ≤±5°C at 950°C, 9-point empty test | ±5°C empty / ±10°C with press head | Stable thermal field for stacked parts |
| Control accuracy | ≤±1°C | ≤±1°C | Repeatable process control |
| Pump-down time | 28 min to specified test point | 27 min to 4.0E-3 Pa | Fast cycle preparation |
| Heating power | 150 kW | 180 kW | Sized to hot-zone volume |
| Total installed power | 200 kW | 250 kW | Industrial power-class equipment |
| Hydraulic pressure | 200T | 200T | High-force diffusion bonding |
| Pressure fluctuation | ±1% FS | ±1% FS | Stable loading through working range |
| Press stroke | 100 mm | 100 mm | Flexible tooling and stacked fixtures |
| Press plate flatness | ≤0.1 mm | ≤0.1 mm | Uniform surface contact |
| Upper / lower plate parallelism | ≤0.2 mm | ≤0.2 mm | Consistent pressure transfer |
| Press plate displacement precision | ≤0.04 mm | ≤0.04 mm | Fine movement control during bonding |
| Cooling pressure | ≤0.08 MPa | ≤0.08 MPa | External circulation cooling support |
| Control mode | Automatic / manual interlock control | Automatic / manual interlock control | Production and setup operation modes |
Built for stable temperature, vacuum and pressure control in high-value joining applications.
The VTM chamber integrates an insulated door, high-temperature hot zone and practical working space for stable, repeatable vacuum joining.
The open-chamber layout provides clear access to the insulated door, hot zone and loading space for efficient production setup.
Choose a compact or extended working zone for your part size, then configure pressure, heating, pumping and controls around the requirements of your vacuum joining process.
Hot zone: 500×500×500 mm. Heating power: 150 kW. Hydraulic pressure: 200T. Suitable for stainless steel and titanium alloy parts, R&D tooling, compact exchanger plates and smaller batch structural assemblies. This vacuum diffusion bonding furnace class handles full-cycle bonding process from pump-down to controlled cooling.
Compact production formatHot zone: 800×500×500 mm. Heating power: 180 kW. Hydraulic pressure: 200T. Suitable for longer plate stacks, titanium alloy components, larger cooling-channel structures and medium-size bonded assemblies.
Extended work lengthAvailable with smaller or larger work envelopes, matched hydraulic loading, pump groups, fixture clearance, control architecture and thermal process configuration for customer-specific bonding lines, aerospace hardware and thermal management parts.
Engineered to process envelopeThe furnace combines high-vacuum pumping, hot-zone uniformity, press accuracy, plate geometry and process automation into one production-ready system.
Working vacuum down to ≤5.0×10⁻³ Pa helps reduce oxidation and contamination during diffusion bonding and brazing cycles. A vacuum diffusion bonding furnace with this vacuum level is suitable for aerospace titanium joining and precision heat exchanger assembly. See also our vacuum brazing furnace for flux-free joining cycles.
Clean interface qualitySuitable for titanium alloy, stainless steel and nickel-based joining processes. For sintering and powder metallurgy applications, see our vacuum sintering furnace.
Diffusion and brazing rangePressure-assisted bonding improves interface contact and supports plate stacks, laminated structures and tooling assemblies.
Controlled force loadingFlatness ≤0.1 mm, parallelism ≤0.2 mm and displacement precision ≤0.04 mm support more uniform bonding pressure.
Better contact uniformityThe VTM furnace control system includes multiple independent interlock loops. Each protects against a specific risk scenario during high-temperature, high-vacuum, high-pressure operation.
Automatic heating cut-off at ≥1210°C. Independent thermocouple loop, separate from the main control thermocouple.
If vacuum degrades beyond the setpoint during bonding, the system automatically holds hydraulic pressure and triggers an alarm. Optional auto-vent with inert gas.
Pressure automatically releases when hydraulic load exceeds 210T (105% of rated capacity). Protects press frame, platens and hydraulic system.
Low flow or low pressure (≤0.08 MPa trigger) generates an alarm and initiates controlled power reduction. Prevents overheating of chamber walls and heating elements.
Built-in compressed air storage tank provides ≥30 minutes of pneumatic supply during power outages. All valves maintain position; no uncontrolled movement of press or vacuum valves.
Furnace door cannot be opened while chamber vacuum is below safety threshold. Vacuum pumps cannot start while door is open. Dual interlock on door switch and vacuum sensor.
VTM vacuum diffusion bonding and brazing furnaces are suitable for components that need clean joints, tight geometry, internal channels or high-temperature service performance.
Titanium alloy panels, structural assemblies and high-integrity joined parts. See the full aerospace vacuum furnace application range.
Plate stacks, microchannel structures, cold plates and compact thermal management parts.
Metal molds, laminated tools, cooling-channel inserts and process fixtures.
Clean metal joining for specialist instruments, lab components and validated R&D parts.
For dissimilar metal combinations or multi-material assemblies, SYNHTE also offers vacuum brazing furnaces and hot-press diffusion bonding configurations - alongside the standard VTM diffusion bonding furnace range.
The chamber layout accommodates pressure tooling, fixtures and practical working space for precision vacuum joining.
The chamber provides space for fixtures, pressure tooling and loading arrangements used in precision joining applications.
The VTM platform supports a broad range of metallic material systems used in aerospace, thermal management, precision tooling and high-integrity structural assemblies.
| Base Material | Intermediate Layer | Typical Process Temp | Typical Applications |
|---|---|---|---|
| Titanium & Nickel Alloys | |||
| TC4 Titanium Alloy | Ti-6Al-4V foil | 920-950°C | Aerospace blades, structural panels |
| 316L Stainless Steel | - (direct bond) | 1000-1050°C | Heat exchanger plates, bellows |
| Stainless Steel + Titanium | Nb foil | 900°C | Transition joints, hybrid assemblies |
| Inconel 718 | - (direct bond) | 1100°C | Aero engine components |
| Steel & Dissimilar Metal Combinations | |||
| Carbon Steel + SS | Ni foil | 1050°C | Overlays, clad plates |
| Titanium + Copper alloy | TiCu interlayer | 880-920°C | Electrical transition joints |
Material, tooling and thermal-control options are available for a wide range of precision joining applications.
The VTM platform coordinates chamber vacuum, heating, hydraulic pressure and controlled cooling to support repeatable joining results.
Practical chamber access supports efficient loading of parts and pressure tooling.
A clean vacuum environment helps protect critical joining interfaces.
Programmable heating profiles support uniform temperature through the work zone.
Coordinated press loading supports consistent contact across complex assemblies.
Managed cooling completes the cycle while protecting part quality.
VTM systems bring the key stages of diffusion bonding and vacuum brazing together in a controlled production cycle.
High vacuum supports clean interfaces for high-value metallic assemblies.
A controlled thermal profile supports consistent temperature across the work zone.
Hydraulic pressure is coordinated with the thermal cycle for stable part contact.
Temperature and pressure remain stable for the selected joining process.
Managed cooling helps protect part quality at the end of the cycle.
The chamber and adjacent control cabinets bring vacuum, temperature, hydraulic pressure and cooling management together in one coordinated system.
The control architecture coordinates loading, chamber vacuum, temperature, hydraulic pressure and cooling through each joining cycle.
VTM systems bring stable vacuum, coordinated heating and hydraulic pressure together for demanding diffusion bonding and vacuum brazing applications.
VTM system configurations combine a practical working zone with high-temperature capability, hydraulic loading and precise press movement.
Explore SYNHTE vacuum furnace systems for brazing, heat treatment and related precision thermal-processing applications.
SYNHTE supports your system from project planning through installation, commissioning and long-term service.
VTM-555 and VTM-855 systems are available for compact and extended vacuum joining applications.
Each system is prepared for reliable vacuum, heating, hydraulic and control performance before shipment.
SYNHTE provides installation, commissioning and operator training for a smooth production start.
Warranty and service support are available for core furnace, vacuum, hydraulic and control components.
Remote and on-site technical service is available to keep your system operating efficiently.
Our team can help configure the furnace platform around your materials, part geometry and joining objectives.
Talk with the SYNHTE team about furnace size, hydraulic pressure, vacuum system, heating power, control mode and configuration options for your precision joining application.
