Vacuum Furnace Products | Brazing & Sintering

Full Product Range

Our Vacuum Furnace Systems

Lakshmi Vacuum Technologies is an Indian manufacturer of vacuum furnaces — from brazing, sintering and hardening to degassing, carburizing and melting. Every system is engineered and built at our Bengaluru works. Select any product card or scroller item to view its technical specifications, operating parameters, and application details.

Built for mission-critical thermal processing

From single-chamber research furnaces to large-scale industrial production lines, every Lakshmi Vacuum system is engineered for repeatability, energy efficiency, and uncompromising metallurgical integrity.

Aerospace Automotive Tooling Space Research

14Product Lines

23+Years Expertise

10⁻⁶mbar Vacuum

Vacuum Brazing FurnaceClick to View Specs

Vacuum Sintering FurnaceClick to View Specs

Vacuum Hardening FurnaceClick to View Specs

Vacuum Degassing FurnaceClick to View Specs

Vacuum Carburizing FurnaceClick to View Specs

Vacuum Melting FurnaceClick to View Specs

Vacuum OvensClick to View Specs

Vacuum AutoclavesClick to View Specs

Thermo-Vacuum Simulation ChamberClick to View Specs

Vacuum Hot PressClick to View Specs

Low Pressure Nitriding FurnaceClick to View Specs

Vacuum Strip Casting FurnaceClick to View Specs

Pack Aluminizing FurnaceClick to View Specs

Rare Earth Magnetic Mineral Processing Equipment Furnace

Rare Earth Magnetic Mineral Processing FurnaceClick to View Specs

Vacuum Brazing FurnaceClick to View Specs

Vacuum Sintering FurnaceClick to View Specs

Vacuum Hardening FurnaceClick to View Specs

Vacuum Degassing FurnaceClick to View Specs

Vacuum Carburizing FurnaceClick to View Specs

Vacuum Melting FurnaceClick to View Specs

Vacuum OvensClick to View Specs

Vacuum AutoclavesClick to View Specs

Thermo-Vacuum Simulation ChamberClick to View Specs

Vacuum Hot PressClick to View Specs

Low Pressure Nitriding FurnaceClick to View Specs

Vacuum Strip Casting FurnaceClick to View Specs

Pack Aluminizing FurnaceClick to View Specs

Rare Earth Magnetic Mineral Processing FurnaceClick to View Specs

Brazing View Specs

Vacuum Brazing Furnace

Joins dissimilar metals using a filler material under vacuum, ensuring clean, strong, and flux-free joints.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	1250°C
3	Hot Zone	Graphite / All Metal
4	Vacuum Level	1 × 10⁻² mbar (10⁻⁶ if required)
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Max Quenching Pressure	6 / 10 / 12 bar
8	No. of Zones	1 or 3 Zones
9	Power Supply	415V AC, 50 Hz, 3-phase
10	Control System	PLC, IPC with SCADA
11	Application	Stainless steel, aerospace parts, copper joining
12	Cooling System	High-pressure inert gas quenching (N₂ / Ar)

Sintering View Specs

Vacuum Sintering Furnace

Densifies powder materials by heating below melting point under vacuum or controlled atmosphere.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	1250°C – 2000°C
3	Hot Zone	Graphite
4	Vacuum Level	1 × 10⁻² mbar (10⁻⁶ if required)
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Max Quenching Pressure	6 / 10 / 12 / 15 bar
8	No. of Zones	1 or 3 Zones
9	Sintering Atmosphere	Vacuum / Argon
10	Power Supply	415V AC, 50 Hz, 3-phase
11	Control System	PLC, IPC with SCADA
12	Application	Powder metallurgy, ceramics, carbide tools, CMCs
13	Cooling System	Water-cooled with optional gas quenching

Hardening View Specs

Vacuum Hardening Furnace

Hardens steel and alloys by heating under vacuum and rapidly cooling using high-pressure gas quenching.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	1250°C
3	Hot Zone	Graphite / All Metal
4	Vacuum Level	1 × 10⁻² mbar (10⁻⁶ if required)
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Max Quenching Pressure	6 / 10 / 12 / 15 bar or oil quench
8	No. of Zones	1 or 3 Zones
9	Power Supply	415V AC, 50 Hz, 3-phase
10	Control System	PLC, IPC with SCADA
11	Application	Tool steels, dies, aerospace parts, precision components
12	Cooling System	High-pressure inert gas quenching (N₂ / Ar)

Degassing View Specs

Vacuum Degassing Furnace

Removes dissolved gases (hydrogen, oxygen) from molten or solid metals to improve purity.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	800°C – 1600°C
3	Hot Zone	Graphite / All Metal
4	Vacuum Level	1 × 10⁻⁴ mbar (10⁻⁶ if required)
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Gas Removal	Hydrogen, Oxygen, Nitrogen degassing
8	No. of Zones	1 or 3 Zones
9	Power Supply	415V AC, 50 Hz, 3-phase
10	Control System	PLC, IPC with SCADA
11	Application	Purification of steel, alloys, superalloys
12	Cooling System	Water-cooled coil and walls

Carburizing View Specs

Vacuum Carburizing Furnace

Introduces carbon into steel surfaces under vacuum using hydrocarbon gases for surface hardening.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	1250°C
3	Hot Zone	Graphite / All Metal
4	Vacuum Level	1 × 10⁻² mbar (10⁻⁶ if required)
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Max Quenching Pressure	10 / 12 / 15 / 20 bar or oil quench
8	No. of Zones	1 or 3 Zones
9	Power Supply	415V AC, 50 Hz, 3-phase
10	Process Gas	Acetylene, Propane, Methane
11	Control System	PLC, IPC with SCADA
12	Application	Gear parts, transmission components, tool steels
13	Cooling System	High-pressure inert gas quenching (N₂ / Ar)

Melting View Specs

Vacuum Melting Furnace

High-purity induction or arc melting for reactive and refractory alloys — VIMF and VAMF configurations.

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#	Parameter	Technical Details
1	Melting Capacity	1 kg – 500 kg
2	Crucible Material	Graphite / Alumina / Zirconia
3	Induction Frequency	1–10 kHz (adjustable)
4	Vacuum Level	1 × 10⁻⁴ mbar
5	Max Temperature	Up to 1700°C
6	Cooling System	Water-cooled induction coil and chamber walls
7	Alloy Capability	Ferrous / Non-ferrous / Reactive metals
8	Degassing Feature	Optional inert gas purging
9	Control System	PLC, IPC with SCADA

#	Parameter	Technical Details
1	Melting Capacity	100 g – 2 kg
2	Electrode Diameter	10 – 100 mm
3	Crucible Material	Graphite / Alumina / Zirconia
4	Atmosphere	Argon / High Vacuum
5	Vacuum Level	1 × 10⁻⁶ mbar
6	Max Temperature	Up to 3500°C
7	Cooling System	Water-cooled copper hearth
8	Arc Ignition	Manual / Automatic Arc Starter
9	Power Supply	DC power supply
10	Applications	Titanium, Zirconium, Tantalum alloys
11	No. of Buttons	Single or Multi-button capability
12	Control System	PLC, IPC with SCADA

Ovens View Specs

Vacuum Ovens

Used for drying, curing, and aging materials in vacuum conditions.

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#	Parameter	Technical Details
1	Temp Range	Ambient to 250°C / 400°C
2	Vacuum Level	10⁻³ – 10⁻⁵ mbar
3	Chamber Size	25 L – 500 L
4	Heating System	Uniform electric heaters with PID control
5	Material	SS304 / SS316 interior
6	Shelves	Adjustable / Removable
7	Controller	Digital PID / Programmable touchscreen
8	Applications	Drying, Degassing, Curing, Baking
9	Control System	PLC, IPC with SCADA

Autoclaves View Specs

Vacuum Autoclaves

Pressure vessels for composite curing or sterilization under vacuum and elevated temperature.

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#	Parameter	Technical Details
1	Chamber Size	Ø300 – Ø2000 mm × 700 – 6000 mm L
2	Max Pressure	Up to 10 bar (gas)
3	Max Temperature	Up to 250°C
4	Vacuum Level	10⁻³ mbar
5	Heating Method	Electrical / Steam jacket
6	Door Type	Manual / Hydraulic locking
7	Applications	Composite curing, Sterilization, Bonding
8	Power Supply	380–480V, 3-phase, 50 Hz
9	Pressurizing Rate	0.5 to 1 bar/min
10	Depressurizing Rate	0.5 to 1 bar/min
11	Control System	PLC, IPC with SCADA

TVAC View Specs

Thermo-Vacuum Simulation Chamber

TVAC space-environment chamber for ground qualification of flight hardware — high vacuum to 5×10⁻⁶ mbar with −196°C to +250°C thermal cycling.

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#	Parameter	Technical Details
1	Temperature Range	−120°C to +150°C (shroud & baseplate); −196°C LN₂ soak; +250°C bakeout
2	Vacuum Level	5×10⁻⁶ mbar ultimate, oil-free pumping train
3	Uniformity	±1°C across the thermal plate
4	Chamber	Horizontal cylindrical, SS 304L, torispherical dished end, front-loading door
5	Design Code	ASME BPVC Sec. VIII Div. 1 (external pressure)
6	Thermal Shroud	Full enclosure, LN₂-cooled (77 K), sets radiative sink temperature
7	Thermal Circulator	Two-stage; independent shroud & baseplate loops, −70°C to +150°C, external Pt100
8	Pumping System	Dry backing + turbomolecular (hydrocarbon-free)
9	Control	Automated PID feedthroughs, recipe control with cycle logging
10	Applications	Satellite qualification, thermal balance/cycling, outgassing, TVAC bakeout

Hot Press View Specs

Vacuum Hot Press

High-temperature pressing combining heat and uniaxial pressure under vacuum to densify powders or bond materials.

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#	Parameter	Technical Details
1	Max Temperature	Up to 2200°C (graphite/molybdenum heaters)
2	Max Pressure	Up to 100 tons (hydraulic press)
3	Heating Zone Size	Ø100 – Ø600 mm (custom available)
4	Vacuum Level	10⁻³ – 10⁻⁵ mbar
5	Atmosphere	Vacuum / Inert gas (Argon, Nitrogen)
6	Control System	PLC, IPC with SCADA, DAS optional
7	Heating Type	Resistance heating with multi-zone control
8	Cooling System	Water-cooled components
9	Applications	Powder sintering, diffusion bonding, composite pressing

Nitriding View Specs

Low Pressure Nitriding Furnace

Diffuses nitrogen into metal surfaces under low pressure to enhance hardness, wear, and fatigue resistance.

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#	Parameter	Technical Details
1	Useful Working Area	900 × 900 × 1200 mm / Customizable
2	Maximum Temperature	700°C
3	Hot Zone	Graphite / All Metal
4	Vacuum Level	1 × 10⁻² mbar
5	Charge Weight	900 kg
6	Furnace Vessel	Carbon Steel / SS
7	Temperature Uniformity	±5°C (AMS 2750)
8	No. of Zones	1 or 3 Zones
9	Power Supply	415V AC, 50 Hz, 3-phase
10	Process Gas	Ammonia (NH₃) and/or Nitrogen + Hydrogen
11	Control System	PLC, IPC with SCADA
12	Application	Automotive gears, aircraft landing gear, injection molds
13	Cooling System	Gas cooling (Nitrogen, Helium)

Strip Casting View Specs

Vacuum Strip Casting Furnace

Melts and rapidly solidifies high-temperature alloys into thin metal strips under vacuum.

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#	Parameter	Technical Details
1	Melting Capacity	1 – 10 kg (Customizable)
2	Cooling Method	Copper wheel with internal water cooling
3	Casting Atmosphere	High Vacuum / Inert Gas (Ar, N₂)
4	Furnace Temperature	Up to 1600°C
5	Strip Thickness	20 – 200 microns
6	Strip Width	Up to 100 mm
7	Control System	PLC with Touchscreen HMI
8	Vacuum Level	≤ 1 × 10⁻³ mbar

Aluminizing View Specs

Pack Aluminizing Furnace

High-temperature diffusion coating system applying aluminum to components for oxidation and corrosion resistance.

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#	Parameter	Technical Details
1	Maximum Temperature	1150°C
2	Heating Method	Electric (Kanthal / MoSi₂ / SiC heaters)
3	Furnace Type	Box / Pit / Retort Type
4	Control	PLC with HMI
5	Atmosphere	Air / Inert Gas (optional)
6	Insulation	Ceramic fiber modules
7	Chamber Size	Customizable
8	Temperature Uniformity	±5°C across hot zone

Mineral Processing View Specs

Rare Earth Magnetic Mineral Processing Furnace

Specialized vacuum furnace for the processing and purification of rare earth magnetic materials, ensuring high-purity magnetic properties.

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#	Parameter	Technical Details
1	Max Temperature	Up to 1600°C
2	Vacuum Level	10⁻³ – 10⁻⁵ mbar
3	Heating System	Induction / Resistance heating
4	Atmosphere	High Vacuum / Argon
5	Crucible Material	Alumina / Zirconia / Graphite
6	Control System	PLC, IPC with SCADA
7	Cooling System	Water-cooled chamber walls
8	Applications	Rare earth magnets (NdFeB, SmCo), magnetic mineral processing

ISO Certified & Industry Compliant

Our operations adhere to international quality and safety standards, with certifications and procedures in place to support customer-specific audits and technical evaluations.

Engineered to Order

Custom Vacuum Furnace Design & Turnkey Delivery

Standard models cover most thermal processes — and when they do not, we build to your specification: special hot-zone geometry, larger charge capacity, higher quench pressure, or a fully instrumented pilot furnace for R&D.

Built to Your Process

Customizable working area, graphite or all-metal hot zones, charge weights up to 900 kg and more, quench pressures of 6 / 10 / 12 bar.

Turnkey Supply

Design, manufacture, factory acceptance testing, installation and commissioning — one accountable partner from drawing board to production.

Lifetime Support

Genuine spares, service and annual maintenance contracts (AMC) for every furnace we build — and for third-party vacuum furnaces too.

Vacuum Furnace Services →

Discuss Your Specification

Complete Range

Vacuum Furnaces, Chambers & Ovens — One Responsible Manufacturer

Lakshmi Vacuum designs and builds every major class of industrial vacuum furnace in India. From precision vacuum brazing and sintering to advanced high-pressure gas quenching, low-pressure carburizing, and vacuum melting, we engineer systems that drive metallurgical perfection. Whether you require standard thermal processing, advanced surface treatment, or specialized thermo-vacuum simulation chambers (TVAC), we have a solution engineered for your success.

Vacuum Brazing Furnace → Vacuum Sintering Furnace → Vacuum Hardening Furnace → Vacuum Carburizing Furnace → Vacuum Melting Furnace → Vacuum Degassing Furnace → Thermo-Vacuum Simulation Chamber → Rare Earth Magnetic Mineral Processing Equipment → Thermo Vacuum Chambers → Vacuum Autoclaves →

Every furnace is engineered to your exact workload. Contact us for a tailored proposal.

Buying Guide

How to Choose the Right Vacuum Furnace

Selecting the right vacuum furnace is a critical decision that shapes the future of your production. It requires balancing your specific thermal processes, workload capacities, and desired metallurgical outcomes. At Lakshmi Vacuum, our engineers partner with you to map out your exact requirements—evaluating everything from hot-zone capabilities and quenching speeds to advanced control systems.

We don’t just sell you a furnace; we help you design a solution built precisely around your operational goals. Every system we deliver includes complete installation, operator training, and lifetime spares support. If you need capacity before you need capital, our vacuum heat treatment services across 9+ Indian locations can process your parts on the exact same class of equipment we build.

Quick Answers

Vacuum Furnace FAQ

1. What types of vacuum furnaces does Lakshmi Vacuum manufacture?

We manufacture 13 vacuum furnace product lines: vacuum brazing, sintering, hardening, degassing, carburizing, melting, vacuum ovens, autoclaves, thermo-vacuum simulation chambers (TVAC), vacuum hot press, low-pressure nitriding and vacuum strip casting furnaces, plus custom-built research and pilot systems.

2. Can you build a custom vacuum furnace for my process?

Yes. Useful working areas, hot zones (graphite or all-metal), charge weights and quench pressures are customizable — for example 900 × 900 × 1200 mm working area, up to 12 bar gas quenching and PLC/IPC with SCADA control. Share your process requirement and our engineers will configure the right furnace.

3. What vacuum levels do your furnaces achieve?

Typical furnace operation is at 1 × 10⁻² mbar, with high-vacuum options down to 10⁻⁴–10⁻⁶ mbar depending on the hot zone and application.

4. Which industries use your vacuum furnaces?

Aerospace, automotive, tooling, space and research applications — including high-integrity brazing, bright hardening, sintering and degassing of critical components.

5. Do you provide spares, service and AMC for vacuum furnaces?

Yes. We support our furnaces throughout their life with genuine spares, service and annual maintenance contracts (AMC) from our Bengaluru facility — see our Furnace Services page for details.

6. How much does a vacuum furnace cost in India?

Vacuum furnace pricing depends on working area, hot-zone material (graphite or all-metal), maximum temperature, vacuum level, quench pressure and control system. Because every furnace is engineered to the workload, we quote per configuration — share your process details for an accurate proposal.

7. Do you deliver vacuum furnaces outside India?

Yes. Lakshmi Vacuum has delivered furnaces to customers in 10+ countries. Export documentation, installation, commissioning and operator training are handled by our own team.

8. Which vacuum furnace is right for my application?

As a rule of thumb: vacuum brazing furnace for joining assemblies, vacuum sintering furnace for powder-metallurgy parts, vacuum hardening furnace with gas quenching for tool steels, low-pressure carburizing for gears and case hardening, vacuum melting or degassing furnace for premium alloys, and thermo-vacuum simulation chambers for space simulation. Our comparison table above maps each series to its typical use.

9. Can I get vacuum heat treatment done without buying a furnace?

Yes. Our vacuum heat treatment service centres across 9+ Indian locations process your components on our own furnaces — brazing, hardening, tempering, annealing and degassing — with the same quality systems as our production equipment.

Ready to discuss your application?

Our engineers will help you select the right furnace configuration for your process requirements.

Speak to Our Expert

Vacuum Furnace Manufacturing — Brazing, Sintering, Hardening & More

Our Vacuum Furnace Systems

Built for mission-critical thermal processing

Vacuum Brazing Furnace

Vacuum Sintering Furnace

Vacuum Hardening Furnace

Vacuum Degassing Furnace

Vacuum Carburizing Furnace

Vacuum Melting Furnace

Vacuum Ovens

Vacuum Autoclaves

Thermo-Vacuum Simulation Chamber

Vacuum Hot Press

Low Pressure Nitriding Furnace

Vacuum Strip Casting Furnace

Pack Aluminizing Furnace

Rare Earth Magnetic Mineral Processing Furnace

Custom Vacuum Furnace Design & Turnkey Delivery

Vacuum Furnaces, Chambers & Ovens — One Responsible Manufacturer

How to Choose the Right Vacuum Furnace

Vacuum Furnace FAQ

Ready to discuss your application?