High Vacuum Tungsten Wire Furnace | Precision Heat Treatment & Sintering

ZYLAB Vacuum Tungsten Sintering Furnace

Introduction

Key Features

1. Robust Furnace Body:

   • Double-layer water-cooling structure with cylindrical welded flanges.

   • Inner wall made of finely polished 304 stainless steel to ensure high vacuum.

   • Outer wall treated with 304 sandblasting, with water cooling between layers.

   • Equipped with a side thermocouple for monitoring metal insulation temperature.

2. Advanced Furnace Cover:

   • Double-layer water-cooled flat structure for both upper and lower covers.

   • Inner wall features finely polished 304 stainless steel for maintaining high vacuum.

3. Efficient Bottom and Lifting Mechanism:

   • Bottom structure similar to the cover, with a central sample platform.

   • Bottom feed and discharge design with a linear guide rail lifting system.

4. Reliable Vacuum System:

   • Composed of a molecular pump, mechanical pump, vacuum pipelines, vent valves, pneumatic butterfly valve, and vacuum gauge.

5. High-Temperature Heating Zone:

   • Uses high-purity tungsten wire mesh as the heating element.

   • Two tungsten mesh pieces suspended vertically inside the furnace.

   • Tungsten electrodes drawn from the side, connected to water-cooled copper electrodes and a transformer.

6. Precise Temperature Control:

   • Utilizes WRe5/26 tungsten-rhenium thermocouples for accurate control.

   • Ideal for inert or dry hydrogen atmospheres, with protective measures to prevent oxidation.

7. Durable Sample Support System:

   • Composed of a multi-layer structure: tungsten plate, pure tungsten sheets, molybdenum sheets, stainless steel plate, and high-purity tungsten rods.

8. Efficient Water Cooling System:

   • Centralized cooling water distribution to the furnace body, cover, electrodes, and diffusion pump, ensuring effective heat dissipation.

9. Integrated Electric Control System:

   • Control cabinet combined with the furnace body for a compact design.

   • Features a touch screen, ammeter, voltmeter, and vacuum gauge.

   • Uses thyristor temperature control with safety functions like overcurrent, water failure, over-temperature, and thermocouple disconnection alarms.

10. Automatic Exhaust Ignition System:

    • Uses double-helical silicon carbide rods as the ignition source.

    • Built-in anti-backfire device for safe and reliable gas combustion.

Applications of High Vacuum Tungsten Wire Furnace

• Metal Compounds: Efficiently sinters metal alloys, intermetallic compounds, and other metallic materials.

• Ceramics: Ideal for high-temperature sintering of advanced ceramics and ceramic composites.

• Inorganic Compounds: Suitable for processing oxides, nitrides, carbides, and other inorganic materials.

• Heat Treatment: Performs annealing, degassing, and thermal processing of metallic and non-metallic materials.

• Material Research: Widely used in research institutions and laboratories for developing new materials and studying high-temperature properties.

• Special Alloys: Perfect for sintering refractory metals and specialized alloys under high vacuum conditions.

Technical Specifications of High Vacuum Tungsten Wire Furnace

Model	B2200-80
Electrical Specifications	AC3*380V/50Hz
Rated Power	20 kW
Maximum Temperature (Tmax)	2200°C (commonly used at 2000°C)
Heating Zone Dimensions	φ80*80 mm
Cold-State Ultimate Vacuum	6.67×10⁻³ Pa
Pressure Rise Rate	≤4 Pa/h
Gas Pressure	≤0.015 MPa
Atmosphere	Argon, nitrogen, dry hydrogen
Temperature Measuring Element	Tungsten-rhenium thermocouple φ0.5*400 mm
Heater Material	Tungsten cage heater φ117*210 mm
Gas Inlet System	Two-way float flow meter with solenoid valve control
External Dimensions	Length 1200 mm × Height 2050 mm × Depth 950 mm
Heating Element and Structure		Acid and corrosion-resistant graphite heater/tungsten-molybdenum heater
Exhaust Gas Treatment		Automatic tail gas ignition system
Control System		Sintering process curve setting: dynamic curve display and multi-curve storage Scheduled sintering with unattended operation Real-time display of sintering power, voltage, and data recording (paperless export) Remote operation and equipment status monitoring Temperature correction for non-linear difference between main control and sample temperature
Pressure Measurement and Monitoring		Mechanical pressure gauge with sealed structure for protection against environmental impact and contamination; high corrosion and high-temperature resistance
Gas Supply System		Integrated float flow meter control, leak-tested before delivery
Net Weight	560 kg
Service & Warranty	One-year warranty with lifetime technical support (excludes consumables such as process tubes and O-rings)

Operational Precautions

1. Thermocouple Maintenance:

   • The thermocouple used in this equipment is a tungsten-rhenium type (WRe5/26), known for its long service life under vacuum conditions.

   • In case of damage, replace the thermocouple promptly.

2. Water Circulation and Maintenance:

   • During winter, ensure proper insulation of the circulating water system to prevent pipe bursts due to freezing.

   • After use, maintain the furnace under vacuum conditions to facilitate quicker vacuuming for the next operation.

3. Handling Heating Elements:

   • The tungsten heating element is brittle. Handle with care when placing workpieces or dismantling the insulation layer to avoid damage.

4. Personnel and Usage Guidelines:

   • The equipment is complex and should be operated by trained and dedicated personnel.

   • Strictly enforce pre-use training for new users, and perform post-use inspections.

   • Maintain operation records according to established usage regulations.

5. Emergency Water Supply:

   • Connect an additional municipal water supply as a backup to the circulating water system.

   • In the event of a power outage, immediately open the backup water source to protect the furnace body.

For More Content

Please read our blog: The Role of Vacuum Atmosphere Tungsten Heating Furnaces in Critical Metal Materials Research

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