1. Overview of Equipment and Application Fields

The GB4-2 High Vacuum Induction Furnace is an advanced experimental smelting system specifically engineered for high-precision alloy production and small-batch manufacturing. With a 2kg capacity, this equipment integrates three core technologies: ultra-high vacuum system, vacuum secondary feeding, and electromagnetic stirring. It effectively addresses critical issues in traditional smelting processes, including oxidation inclusions, compositional segregation, and insufficient density. Operating under an ultra-high vacuum environment of 6.67×10⁻³Pa, the system employs electromagnetic field-induced forced convection to ensure exceptional purity and uniformity of molten metal. This makes it particularly suitable for producing high-performance materials such as precious metals (gold, silver), non-ferrous metals (copper), and specialty alloys.

The GB4-2 system not only inherits the advantages of induction melting—rapid temperature rise and high efficiency—but also innovatively introduces a vacuum secondary charging chamber. This design allows the addition of easily oxidizable elements or composition adjustments while maintaining high vacuum conditions, completely eliminating oxidation losses caused by air exposure. Its electromagnetic stirring function performs non-contact, high-intensity mixing during the melting process, breaking down density differences that cause stratification and achieving microscopic-level uniformity in alloy element distribution. Equipped with a Siemens PLC control system, the equipment enables automated and intelligent melting processes, supported by a six-tier safety protection mechanism to ensure worry-free safety in both experimental and production operations.

Widespread application areas:

· Research institutes and university laboratories: For the development of novel alloy materials, research on physical properties of metals, and preparation of small-batch high-purity samples.

· New energy industry: high performance battery electrode materials, hydrogen storage alloys, melting and modification of magnetic materials.

· Aerospace: Prototype manufacturing and testing of critical components including high-temperature alloys, lightweight high-strength aluminum alloys, and titanium alloys.

· The semiconductor industry: preparation of high purity metal targets and special electronic packaging materials.

· Jewelry: High-precision smelting and purification of precious metals including K gold, platinum, and silver, ensuring flawless color and oxidation-free quality.

· Nonferrous metal smelting: homogenized melting of complex alloy compositions such as copper alloys and nickel-based alloys.

2. Core Functional Highlights

Double Pump Combined Ultra High Vacuum System-Ultimate Purity

o Diffuser pump + direct-connected pump combination: The equipment employs a high-performance diffuser pump in series with a direct-connected mechanical pump to form a robust vacuum system.

o Ultra-high vacuum: The ultimate vacuum level reaches 6.67×10⁻³ Pa. Melting under this extreme vacuum environment effectively removes harmful gases such as hydrogen, nitrogen, and oxygen from the melt, prevents porosity formation, and significantly enhances the density and compactness of the final product, achieving true oxidation-free melting.

Vacuum Secondary Feeding Technology-Full Process Anti-Oxidation

o Anoxic environment feeding: The innovative vacuum secondary charging chamber design enables users to continuously add highly reactive elements (e.g., rare earths, magnesium, aluminum) or perform precise compositional adjustments to the melt while maintaining high vacuum conditions in the main smelting chamber.

o Prevent oxidation loss: The entire feeding process requires no vacuum breaking, completely isolates air to prevent oxidation and burn-off of precious alloy elements, improves raw material utilization, and ensures precise control of the chemical composition of the finished product.

o Flexible process optimization: Supports multi-stage feeding processes to meet the stringent requirements of complex alloy formulations regarding feeding sequence and temperature, providing significant process flexibility for new material development.

Electromagnetic stirring function-Homogeneous without segregation

o Non-contact forced convection: The alternating magnetic field generated by the induction coil induces eddy currents in the molten metal, creating a powerful electromagnetic force to drive the movement of the melt, achieving uniform stirring.

o Eliminate compositional segregation: Effectively overcome gravity segregation caused by differences in metal specific gravity, ensuring uniform distribution of alloy elements throughout the melt and eliminating localized enrichment or depletion.

o Enhance color consistency: Achieve high uniformity in the chemical composition, microstructure, and physical properties of the final castings, significantly improving product pass rates and performance stability, particularly for complex multi-component alloys.

Siemens PLC Intelligent Control-Simple and Efficient

o Industrial-grade control core: Equipped with Siemens PLC control system, a global leader in automation technology, ensuring stable and reliable operation with strong anti-interference capability.

o User-friendly and easy to operate: Equipped with a humanized human-machine interface, users can intuitively set and monitor key parameters such as melting temperature, stirring intensity, vacuum level, and feeding time. The simplified operation process reduces human error, enabling even non-professionals to quickly get started.

o Automated operation: Enables one-click initiation of a fully automated smelting process, covering vacuum extraction, heating, stirring, feeding, and cooling, with complete automation to significantly enhance experimental efficiency.

Six-level safety protection system-safe production

o Comprehensive Protection: The device features six built-in safety mechanisms, including but not limited to: hydraulic pressure protection, overheat protection, overcurrent protection, vacuum interlock protection, access control safety switch, and emergency stop button.

o Unworry-Free Operation: When the system detects abnormal cooling water, temperature exceeding limits, excessive current, vacuum leakage, or improperly closed cabin doors, it automatically cuts power and triggers an alarm to ensure equipment and operator safety, achieving 'guaranteed safe production'.

3. Technical Parameters and Specifications

4. Detailed Explanation of Typical Application Scenarios

High-end jewelry manufacturing:

o K Gold Homogenization Smelting: The electromagnetic stirring function effectively resolves density segregation in multi-component alloys (gold, silver, copper, zinc), ensuring consistent coloration (18K/24K) and uniform hue across all batches of K Gold jewelry, with no color variations.

o Precious metal oxidation-free smelting: In a high vacuum of 6.67×10⁻³ Pa, pure gold or pure silver is melted with secondary feeding to obtain gold or silver ingots with a bright surface, no internal pores, and extremely high density, thereby reducing the oxidation loss of precious metals.

New Material Development and University Experiments:

o Special alloy preparation: When developing new aluminum or magnesium alloys containing easily oxidizable elements such as rare earth and magnesium, the vacuum secondary feeding function was utilized to precisely control the addition timing, thereby avoiding element burn-off and successfully preparing experimental samples with precise composition.

o High purity metal research: Melting high purity copper or iron in ultra-high vacuum environment, removing gas impurities, and studying the effect of vacuum degree on metal microstructure and mechanical properties.

New Energy and Aerospace:

o Hydrogen storage alloy melting: Preparation of lanthanum-nickel series and other hydrogen storage alloys, ensuring uniform distribution of elements through electromagnetic stirring to enhance the consistency of hydrogen absorption and desorption performance.

o High temperature alloy prototype manufacturing: to provide high density, no inclusion master alloy ingot for small batch trial production of aero-engine blade material, and to verify the feasibility of new material process.

Semiconductors and electronic materials:

o The preparation of the target alloy: high purity copper alloy or silver alloy is melted as the raw material of the sputtering target, ensuring the extremely low gas content and extremely high density, and guaranteeing the quality of the subsequent coating.

o Electronic packaging materials: Fabricate high thermal conductivity and low thermal expansion coefficient electronic packaging alloys. The stirring function ensures uniform distribution of all phases in the composite material, thereby enhancing thermal management performance.

5. Why choose the GB4-2 high-vacuum induction melting furnace?

The GB4-2 High Vacuum Induction Smelting Furnace redefines alloy smelting standards in laboratory and small-scale production through three core technologies: ultra-high vacuum (6.67×10⁻³Pa), vacuum secondary feeding, and electromagnetic stirring. It not only resolves persistent challenges like compositional segregation and oxidation loss in traditional smelting, but also ensures exceptional density and purity through dual safeguards of diffusion pumps and direct-connected pumps. Siemens PLC intelligent control system simplifies complex smelting processes, while its six-tier safety protection design provides robust laboratory environment assurance. Whether for jewelers pursuing exquisite finishes or researchers pushing material performance limits, the GB4-2 stands as a trusted partner. Choosing GB4-2 means selecting a high-quality, efficient, and safe smelting solution that drives continuous breakthroughs in metal material research and application, enabling the creation of superior alloy products with enhanced performance and greater value.