Vacuum hot pressing sintering furnace

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Vacuum hot pressing sintering furnace uses:

Powder metallurgy, functional ceramics and other new materials, high-temperature thermoforming.

Vacuum hot-pressing sintering furnace is mainly used for high-temperature sintering and hot pressing in non-metallic materials, carbon-carbon composite materials, ceramic materials, cemented carbide, synthetic diamond and metal powder materials under vacuum or protective atmosphere can also be used Various materials (such as ceramics, alloys, diamonds, etc.) diffusion welding. Various materials in a vacuum environment for protective heating sintering, is conducive to the removal of volatile materials and gases, to achieve high density sintering material and prevent the formation of surface oxide layer; hot pressing sintering process in the vacuum at the same time Pressure on the material accelerates the densification process.

Vacuum hot-pressing sintering furnace technical specifications:

1. Operating temperature: 2000 ℃ ~ 2300 ℃, the maximum temperature: 2400 ℃.
2. Load heating time: ≤ 3 hours, load cooling time: 5 hours.
3. Temperature uniformity: ≤ ± 10 ℃ (2300 ℃)
4. Degree of vacuum: cold degree of vacuum: 6.67 × 10-3Pa; Working degree of vacuum: 6.67 × 10-2Pa (according to user requirements).
5 pressure rate: ≤ 0.133Pa / min.
6. Work area size: ¢ 140mm × H160mm ~ ¢ 200mm × H250mm (according to user requirements).
7. Pressure: 10 tons to 300 tons (according to user requirements).

Vacuum hot-pressing sintering furnace by the furnace, press system, vacuum system, electrical control system.

Furnace: vacuum hot pressing sintering furnace designed according to the process requirements of vertical or horizontal structure, the furnace is double-layer water-cooled structure, the inner wall of stainless steel, the outer layer of carbon steel or stainless steel structure according to user needs, equipment furnace is Press the maximum pressure range of -0.1 ~ 0.05MPa design. In and out of materials: Vertical structure of the top of the material can be used, the bottom of the material into and out of the side of the material, the horizontal structure of the front door with the material. The heating element adopts graphite (also can use electric alloy material or tungsten according to user’s process requirement). High temperature alloy indenter can adopt high-temperature alloy, tungsten or high-strength graphite. According to the requirement of process, DC inlet Electrical devices, making a certain potential difference between the upper and lower pressure head.
Press system: by the press and hydraulic station components, small presses commonly used two beam two columns; larger two-beam four-column press. Press cylinder, water pressure head, high pressure head together with the mold to form a pressure ring system, large hydraulic press station with double pump configuration, hydraulic control using closed-loop control, the main cylinder of the uniform and adjustable propulsion speed. In addition the hydraulic system can be small manual pump in parallel, when sudden power failure, the pressure can be promptly added to the large tank, so as to prevent waste. In the press head with a grating ruler, by accurately measuring the displacement of large cylinders, calculate and control the relative density of products. For a small press, a pressure sensor can be connected between the upper cylinder and the water-cooled finale, which can accurately control the pressure and realize the correspondence between the relative density and the pressure of the material.

Vacuum system: The main pump of the vacuum system can be diffusion pump or molecular pump. The former pump uses the Roots pump and the mechanical pump in series or adopts the mechanical pump directly. Since the heating elements are made of metal material with very little volatilization and deflation at high temperature, You can get a higher degree of vacuum, according to the configuration of the pump cold limit vacuum can reach 6.67 × 10-3Pa, the working vacuum can reach 6.67 × 10-2Pa.