Graphite Products for vacuum Furnace Graphite Electric Connectors

Product Description

what is the vacuum furnace?

It is easy to understand that the industrial furnace heated by electric heating elements in the near vacuum state is called vacuum furnace. It is mainly used in ceramic firing, vacuum smelting, degassing of electric vacuum parts, annealing, brazing of metal parts, and sealing of ceramics and metals.

Vacuum furnace is a kind of heat treatment method developed with the development of precision machinery manufacturing, aerospace, national defense and other cutting-edge industries, especially in recent years, the improvement of the performance and accuracy requirements of parts makes the precise control of vacuum furnace more and more important.

For high temperature state, the accessories of vacuum furnace can only use the high temperature resistant graphite products, thus forming the graphite accessories of vacuum furnace. These graphite accessories includes heat insulation graphite felt, graphite heating rod, graphite furnace guide rail, guide nozzle, graphite conducting rod, graphite connecting piece, graphite pillar, furnace bed support, graphite screw, graphite Nuts and other products.

 

Our products for high-temperature furnaces

1. Connectors, Heaters, Furnace Linings, Shields, Rails, CVD Fixtures, Graphite current bridges, graphite beams, graphite posts, graphite roller conveyors, graphite connection bridges, Curved Heating Elements, Graphite Fasteners
2. Insulation made in graphite rigid felt, graphite soft felt
3. Carbon/Carbon Fasteners such as bolts, nuts and rods
4. Charging racks and loading trays made in graphite or C/C

Why graphite is the ideal material for your hot zone?

Specialty graphite is essential for building high-performance, high-temperature furnace. The thermal conductivity of graphite is fairly high, while the coefficient of thermal expansion is very low. These characteristics contribute to its superior thermal shock resistance. Graphite is an extremely stable material in high temperature, making it an ideal solution for heat treatment processes.


Cangzhou Carbon Technology can produce a complete range of material and machined products for high temperature vacuum furnace:

Many grades of graphite material for your choice from fine grain isostatic graphite to medium grain extruded graphite.

2D, 2.5D, 3D carbon fiber composite for sheets, plates, channels, nuts, bolts, screws and so on.
We machine and manufacture parts according to your drawings, complicated and preciosn machining service can be available.
 

Advantages of graphite for high-temperature furnaces:

1. High running temperature:running temperature can up to 3000 ºC (based on the vacuum level or under the protection of inert gas)
2. High Strength and high heat resistance: The melting point of graphite is 3850 ± 50 ° C and the boiling point is 4250 ° C. Even if it is burned by ultra-high temperature arc, the weight loss is small and the thermal expansion coefficient is very small. The strength of graphite increases as temperature raises. At 2500 ºC, graphite has 2 times more strength then at room temperature.

 

3. Graphite has low thermal expansion

4. Graphite is lightweight (1/5 of metal)

5. Graphite has a higher thermal uniformity. Graphite creates the ideal conditions inside the heating chamber of furnace to obtain high thermal uniformity.

6. Extended lifecycle: graphite is unaffected by thermal shock and will not degrade due to frequent heating and cooling.

7. Graphite helps reduce maintenance costs: graphite hot zone is easily repairable.

8. Graphite has excellent resistance to corrosion and radiation.

What is heat treatment?

Heat treatment is a controlled process that involves heating and cooling metal or alloy components to alter their properties. The primary purpose of heat treatment is to modify the microstructure of the material. This, in turn, affects the material's hardness, strength, ductility and other characteristics. This means, heat treated parts can withstand greater stresses and perform beeter under demanding conditions. To better understand the significance of heat treatment, let's take an example. Tools like drill bits and cutting blades undergo heat treatment to increase their hardness. This enable them to withstand repeated use and maintain sharp cutting edges.
 

It's actually an essential part of the manufacturing process. That's because heat treating allows a metal piece to be improved in order for the material to better withstand wear and tear. Heat treatment involves heating a metal or alloy to a specific temperature and then cooling it to harden the material. 
Heat treatment can be used at different stages in the manufacturing process to change certain properties of that metal or alloy. For example, you might use heat treatment to make it stronger, harder, more durable, or more ductile, depending on what the material needs in order to perform properly. 
 

How Does Heat Treatment Work?

In order to achieve the desired effect, the metal or alloy is heated up to a specified temperature, sometimes as hot as 1315ºC (2400ºF) , kept at that temperature for a certain amount of time, and then cooled. While it's hot, the metal's physical structure, also called the microstructure, changes, ultimately resulting in its physical properties being changed. The length of time the metal is heated for is called the 'soak time.' The length of soak time plays an important role in the characteristics of a metal, as metal soaked for a long amount of time will see different microstructure changes than metal soaked for a shorter period of time. 
 
The cooling process after the soak time also plays a part in the result of the metal. Metal may be cooled quickly, which is When the metal is heat-treated during the manufacturing process also determines what properties are changed, and some metals may even be treated multiple times.


Technical Data of Graphite Material: 
Isostatic Graphite

Property	KBD-5	KBD-6	KBD-7	KBD-7B	KBD-8	Unit
Apparent Density	1.85	1.90	1.82	1.82	1.90	g/cm^3
Max Grain Size	13-15	8-10	8-10	13-15	8-10	µm
Ash value	≤500	≤500	≤500	≤500	≤500	ppm
Specific Electrical Resistivity	8-10	8-9	11-13	11-13	11-13	μΩm
Flexural Strength	46	55	51	59	60	Mpa
Compressive Strength	85	95	115	121	135	Mpa
Shore Hardness	48	53	65	70	70	HSD
Thermal Expansion (room temperature to 600ºC)	4.75	4.8	5.8	5.8	5.85	10-6/ºC

Molded Graphite 

Property	KBG-4	KBG-5	Unit
Apparent Density	≥1.80	≥1.85	g/cm3
Ash value	≤500	≤500	ppm
Shore Hardness	≥40	≥45	HSD
Specific Electrical Resistivity	≤12	≤12	μΩm
Flexural Strength	38	41	Mpa
Compressive Strength	81	87	Mpa
Max Grain Size	25	25	μm

Vibration Graphite

Property	TSK	GSK	Unit
Apparent Density	≥1.70	≥1.72	g/cm3
Max Grain Size	≤2	≤0.8	mm
Specific Electrical Resistivity	8-10	≤8.5	μΩm
Flexural Strength	≥12.5	≥15	Mpa
Compressive Strength	≥28	≥35	Mpa
Porosity	≤24	≤20	%
Ash value	≤0.3	≤0.3	%

 

Strict Quality Control Ensures High Quality Products

  

Safe Packing 

Question and Answer:

Q:Are you a manufacturer or trading company?
A:We are a manufacture for graphite material and graphite machined products.

Q:How can you gurantee the quality?
A:We have the most advanced equipments in our Lab and professional quality control team.We can gurantee each batch of the product with the stable quality.

Q:Can you offer samples?
A: Yes, we offer samples to test

Q: Delivery time?
A:Around 10 days.

Q: Shipping pot
A: Tianjin or main port in China

Q:Payment terms
A:T/T,LC at sight