Product Introduction
This vacuum hot pressing furnace is specially designed for the vacuum hot pressing and sintering process of high-performance materials such as ceramics, composite ceramics, and superhard materials. The equipment adopts graphite or metal resistance heating elements, coupled with an oil cylinder driven upper/A downward pressurization system that achieves densification sintering of materials under high temperature and high pressure. The vacuum environment suppresses oxidation reactions, while external pressure accelerates the bonding and grain growth between material particles, effectively reducing pores and grain boundaries, promoting mass transfer, leading to volume shrinkage and significant density increase of the green body, ultimately forming a dense polycrystalline sintered body with excellent microstructure, meeting the material forming requirements of high precision and high strength.
Technical Features
High-efficiency heating system: Adopts graphite or metal resistance heating, with a maximum working temperature of up to2200℃(Depending on the heating element), fast heating rate, good furnace temperature uniformity.
Dual Axis Pressing Method: The ram driven by an upper or lower cylinder achieves uniaxial pressing, with an adjustable pressure range (typical value5~50tons), ensuring stable and controllable pressing process.
High vacuum environment: Equipped with a high-performance vacuum unit, the ultimate vacuum can reach6.67×10⁻³ Pa, effectively preventing material oxidation and outgassing, and improving sintering purity.
Precise temperature and pressure control: AdoptsPIDProgram-controlled temperature instrument and pressure sensing feedback system, achieving temperature-Pressure-Automatic sintering process curve linked with time.
Safety protection design: Equipped with water-cooled jacket furnace shell, over-temperature and over-pressure alarms, water-off and power-off interlock protection, ensuring safe and reliable long-term continuous operation of the equipment.
Modular structure: Furnace body, vacuum system, hydraulic system, and electrical control cabinet are separated and combined, facilitating maintenance and functional expansion.
| Mold Sleeve Size | ɸ300*400mm | ɸ500*700mm | ɸ700*900mm | ɸ900*900mm | ɸ1100*900mm |
| Product Size | ɸ160 | ɸ300 | ɸ400 | ɸ500 | ɸ600 |
| Pressure | 100T | 300T | 60T | 1000T | 1500T |
| Cold state ultimate vacuum | 5Pa | 5Pa | 5Pa | 5Pa | 5Pa |
| Maximum Temperature | 2400℃ | ||||
| Heater | Graphite/Tungsten wire | ||||
| Shell structure | Double-layer water-cooled vacuum shell structure | ||||
| Insulation Material | Graphite felt (graphite furnace)/Tungsten-molybdenum metal insulation screen (tungsten wire furnace) | ||||
| Temperature Control Accuracy | ±1℃ | ||||
| Temperature Control Method | PIDAdjustment | ||||
| Heating Rate | <=20℃/min | ||||
| Ultimate vacuum | 10Pa/5*10-3Pa/5*10-4Pa | ||||
| Pressure increase rate | 0.67Pa/h | ||||
| Gas Type | Nitrogen/Argon/Inert gases such as hydrogen | ||||
| Ultimate pressure | ≤40KPa | ||||
| Explosion-proof pressure | 40KPa | ||||
| Control System | Touchscreen, Fully AutomaticPLCControl system | ||||
| Random Data | Selection Manual, Certificate of Conformity, Maintenance Card, Instruction Manual, Delivery List | ||||
Application Fields
Advanced ceramic manufacturing: Densification sintering of structural ceramics such as alumina, zirconia, silicon nitride, and silicon carbide.
Composite ceramic materials: Ceramic matrix composites (CMC), near-net forming of fiber-reinforced ceramic composite materials.
Superhard material synthesis: polycrystalline diamond (PCD), polycrystalline cubic boron nitride (PCBN) and other superhard composite inserts vacuum hot pressing and sintering.
Powder metallurgy: Vacuum hot pressing and densification of high-temperature alloys, refractory metals (tungsten, molybdenum, tantalum) and their alloys.
Electronics and semiconductors: Preparation of high-performance electronic ceramics such as aluminum nitride substrates and conductive ceramic targets.
Scientific research and pilot scale: Universities and research institutes conduct R&D on high-temperature and high-pressure sintering processes for new materials.
Product Advantages
High densification: Vacuum environment+Dynamic pressurization synergistic effect, making the sintered body approach theoretical density, porosity<= 1%, mechanical properties are significantly improved.
No Oxidation Contamination: Full vacuum protection, especially suitable for high-purity materials such as active metals and non-oxide ceramics.
Uniform Structure: Pressure promotes controllable grain growth, resulting in a uniform microstructure and avoiding abnormal grain growth in conventional sintering.
Energy saving and high efficiency: High thermal efficiency of resistance heating, coupled with a vacuum insulation screen, results in low heat loss and short sintering cycles.
Process Flexibility: Multi-stage curves can be set for stepped heating, constant temperature and pressure, and furnace cooling, adapting to sintering processes for different materials.
Integrated design: Hydraulic, heating, and vacuum linkage control, simple operation, good repeatability, high yield rate.
