High Vacuum Tungsten Wire Furnace | Precision Heat Treatment & Sintering

Key Features

• 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.

  • 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.

    • 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.

      • Reliable Vacuum System:

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

        • 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.

          • 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.

            • 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.

              • Efficient Water Cooling System:

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

                • 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.

                  • 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.

                    Operational Precautions

                    • 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.

                      • 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.

                        • Handling Heating Elements:

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

                          • 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.

                            • 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.