Mon, 10 Sep 2018 03:00:14 +0000

Vacuum furnace

Construction of vacuum furnace

The vacuum furnace is generally composed of a main engine, a furnace, an electrothermal device, a sealed furnace shell, a vacuum system, a power supply system, a temperature control system and an outside conveyor. The sealed shell is welded with carbon steel or stainless steel, and the joint surface of the detachable part is sealed by vacuum sealing material. In order to prevent the deformation of the shell after heating and the deterioration of the sealing material, the furnace shell is usually cooled by water cooling or air cooling. The furnace is located in the sealed furnace shell. According to the use of the furnace, the furnace is equipped with different types of heating elements, such as resistance, induction coil, electrode and electron gun. The vacuum furnace for smelting metals is equipped with a crucible, and some are equipped with automatic pouring devices and manipulators for loading and unloading materials. The vacuum system is mainly composed of vacuum pump, vacuum valve and vacuum gauge.

Vacuum quenching (tempering, annealing) is a method to achieve the desired performance by heating and cooling the material or parts in vacuum according to the process regulations.
Vacuum brazing is a welding process in which a group of weldments are heated to the melting point of the filler metal above the melting point of the filler metal but below the melting point of the base metal. The brazing temperature varies with the material.
Vacuum sintering is a method of sintering the adjacent metal powder grains into parts through adhesion and diffusion by heating metal powder products in vacuum.
Vacuum plus magnetism is mainly applied to metal materials and magnetic treatment.

Vacuum furnace, or vacuum heat treatment furnace, is divided according to the application equipment.

Vacuum quenching furnace, vacuum brazing furnace, vacuum annealing furnace, vacuum tempering furnace, vacuum sintering furnace, vacuum diffusion welding furnace, vacuum carburizing furnace, etc.

Vacuum sintering furnace

Vacuum sintering furnace is a kind of furnace for protective sintering of heated materials in vacuum environment. There are many heating methods, such as resistance heating, induction heating, microwave heating and so on.

Vacuum sintering furnace

Vacuum sintering furnace

Main Technical Data OVacuum Sintering Furnace

Models

Effective working

dimension

(mm)

Max

temp.

()

Ultimate

pressure

(Pa)

Pressure

rising rate

(pa/h)

Temperature

uniformity

()

Loading

capacity

(kg)

RVS-446

400x400x600

1300

6.7*10-1

0.67

±5

100

RVS-559

500x500x900

1300

6.7*10-1

0.67

±5

150

RVS-4413

400x400x1300

1300

6.7*10-1

0.67

±5

200

RVS-8810

800x800x1000

1300

6.7*10-1

0.67

±5

1500

RVS-8832

800x800x3200

1300

6.7*10-1

0.67

±5

3000

RVS-V0405

Φ400*500

1300

6.7*10-1

0.67

±5

200

RVS-X

Custom

 made

custom made

custom made

custom made

custom

made

custom made

 

vacuum brazing furnace

Vacuum brazing furnace is mainly used for aluminum brazing, copper brazing and stainless steel brazing of aviation parts, automobile parts, electronic communication parts, household appliances, heat exchangers and various radiators.

Vacuum brazing furnace

Vacuum brazing furnace

Main technical data of high temperature vacuum brazing furnace

Model

Effective working

dimension

(mm)

Max temp.

(℃)

Ultimate

pressure

(pa)

Pressure

rising rate

(pa/h)

Temp.

uniformity

(℃)

Loading capacity(Kg)

RVB-559L

500x500x900

720

6.7×10-3

0.67

±5

150

RVB-669L

600x600x900

720

6.7×10-3

0.67

±5

200

RVB-6612L

600x600x1200

720

6.7×10-3

0.67

±5

300

RVB-7712L

700x700x1200

720

6.7×10-3

0.67

±5

500

RVB-8716L

800x700x1600

720

6.7×10-3

0.67

±5

800

RVB-X-L

Custom-

made

Custom-

made

Custom-

made

Custom-

made

Custom-

made

Custom-

made

 

Vacuum annealing furnace

Vacuum annealing furnace is mainly used for bright annealing of superalloy steel, magnetic materials, non-ferrous metals, stainless steel, titanium alloy and so on.

Vacuum annealing furnace

Vacuum annealing furnace

Main Technical Data OVacuum Annealing Furnace

Models

Effective working

dimension

(mm)

Max temperature

()

Ultimate Pressure

(Pa)

Pressure

rising rate

(pa/h)

Temperature

uniformity

()

Loading

capacity

(kg)

RVA-448

400x400x800

1300

6.7*10-3

0.67

±5

100

RVA-459

450x450x900

1300

6.7*10-3

0.67

±5

150

RVA-669

600x600x900

1300

6.7*10-3

0.67

±5

200

RVA-6612

600x600x1200

1300

6.7*10-3

0.67

±5

300

RVA-7712

700x700x1200

1300

6.7*10-3

0.67

±5

500

RVA-8812

800x800x1200

1300

6.7*10-3

0.67

±5

800

RVA-3575

350x350x7500

1300

6.7*10-3

0.67

±5

1000

RVA-11630

1100x600x3000

1300

6.7*10-3

0.67

±5

3000

RVA-V 1110

Φ1100×1000

1300

6.7*10-3

0.67

±5

2000

RVA- x

custom

 made

custom made

custom made

custom made

custom

made

custom made

Function of vacuum furnace

1. vacuum boiler is operated under negative pressure environment, so it will not explode. It is a national exemption product.
2. Successful separation of high temperature zone and high pressure zone of boiler stress steel plate makes the service life of boiler extend 2-3 times and the design service life reach 30 years.
3. the overall design is scientific, reasonable and compact, saving floor area 50-70%.
4. Heat exchange in the boiler body, the efficiency of the whole machine is as high as 91%. 70-80 C hot water can be provided within 2-3 minutes after start-up, which greatly shortens the preheating period and reduces energy waste.
5. fully automatic control, intelligent, unmanned operation or remote network control can be implemented.
6. built in stainless steel heat exchanger, no pollution to water quality.
7. Compared with the indirect heating mode (boiler + external heat exchanger + circulating water pump + material + installation cost), the installation cost can be saved by more than 30-40%.
8. high efficiency, fast heating and good heat exchange, so that the cost of fuel can be saved by more than 20-30%.

Vacuum furnace characteristics

1. Vacuum furnaces are mostly operated under negative pressure, and the quenching gases used are also inert gases, which will not produce explosion, providing a great guarantee for the safety of operators.
2. The steel plates used in the heating chamber of vacuum furnace are all heat-resistant steel plates, and the heat resistance will be far greater than the working limit temperature. The pressure of the steel plate used in the gas quenching furnace is far greater than the working limit pressure, which ensures the safe use of the vacuum furnace and prolongs the service life of the vacuum furnace.
3. The overall design of the vacuum furnace is more reasonable and the space used is more compact. The oil pool of the oil quenching furnace is below the furnace body, which can effectively save the production space.
4. Vacuum furnace heating is carried out in a certain closed space, without contact with the outside world, can be used to a large extent to reduce heat loss, and furnace temperature uniformity is more easily realized and controlled; in the furnace can be recycled cooling water, the use of water resources in the process of pollution-free. . In short, water, electricity and other resources can be saved to a large extent.
5. vacuum furnace can realize automatic operation and intelligent operation in the whole process. It can effectively save human resources and reduce the workload of operators.
6. The copper-copper heat exchanger in the furnace can effectively reduce the gas temperature during gas quenching and make the cooling effect more obvious. The heat exchanger itself has good air tightness, does not have direct contact with the furnace, can prevent water pollution. With the development of mechanization in the direction of precision, vacuum furnace has got unprecedented development opportunities. Understanding the characteristics of vacuum furnace can be more effective to know how to choose, and provide a broader space for the development of their own cause.