What is the Advantage and Disadvantage of graphite electrodes for sale

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The difference between graphite electrode vs. copper electrode

Graphite electrode vs. copper electrode-the industry&#;s two most commonly used electrode materials are graphite and copper electrodes. Graphite is a non-metal element, while copper is a metal.  At the same time, graphite electrodes are made of petroleum coke, pitch coke, etc., while copper electrodes are made of copper alloys.

Advantages and disadvantages of graphite electrodes

Graphite electrodes have several advantages. One of the main advantages is that they are resistant to high temperatures, but they are also highly resistant to thermal shock, which means they can withstand sudden temperature changes without cracking or breaking. They are also chemically inert, making them ideal for corrosive environments.

However, graphite electrodes also have some disadvantages. They are brittle than copper electrodes and may crack or break during use. It also has a lower electrical conductivity than copper electrodes, which results in slower processing times.

Advantages and disadvantages of copper electrodes

Copper electrodes have several advantages. They are excellent electrical conductors, are very durable, and have excellent thermal conductivity, which means they dissipate heat quickly, reducing the risk of thermal damage to the workpiece.

However, copper electrodes also have some disadvantages. They are not suitable for high temperature environments because their melting points are lower than graphite electrodes. There is also generally a higher risk of corrosion in corrosive environments.

Application fields 

Graphite electrodes are often used in wide range industries that require high-temperature resistance. For example, for the electric arc furnace steelmaking, aluminum, and iron industries used for producing alloys and other high-temperature materials. People also use them in the glass and ceramic industries for melting and shaping materials.

Copper electrodes are often used in precision machining and cutting in the electronics industry. People also use them in the automotive industry to make engine parts and in the aerospace industry to make aircraft components.

 Graphite vs Copper Electrode

Graphite and copper electrodes have different properties, making them suitable for different applications. When comparing these two materials in terms of cost, lifetime, and performance, we can observe the following:

Cost: Graphite electrodes are usually less expensive than copper electrodes.

Lifespan: Copper electrodes have a longer lifespan than graphite electrodes.

Performance: Graphite discharges two times faster than copper. Graphite material is not easily deformed, but copper electrodes are easily bent.

Which electrode is best for your industry?

The choice of electrode material depends on several factors, including industry type, production process, and specific application. Graphite electrodes are very suitable for high-temperature environments, while copper electrodes are more suitable for precision machining and cutting in the electronics industry.

Conclusion for Electrode Selection

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In short, graphite electrodes are very suitable for high-temperature environments, while copper electrodes are more suitable for precision machining and cutting in the electronics industry.

It would help if you considered cost, lifetime, and performance when choosing between graphite and copper electrodes.

The choice of electrode material should be based on the specific requirements and industry of the application. Considering the factors outlined in this article, you can decide which electrode material is best for your industry.

&#;Introduction of graphite electrode:

Graphite electrode, mainly with petroleum coke, needle coke as raw materials, coal asphalt as a binder, calcining, mixing, pressing, roasting, graptitization, machining and made, is in the arc furnace in the form of electric energy release arc to heat and melt the furnace charge conductor, according to its quality index, can be divided into ordinary power, high power and ultra high power.

&#;Classification of graphite electrode:

Ordinary power graphite electrode: allows the use of current density of less than 17A/ cm 2 graphite electrode, mainly used in steel, silicon refining, yellow phosphorus refining and other ordinary power electric furnace.

High power graphite electrode: allows the use of current density of 18~25A/ cm 2 graphite electrode, mainly used in steel making high power arc furnace.

Ultra-high power graphite electrode: allows the use of current density greater than 25A/ cm 2 graphite electrode, mainly used in ultra-high power steel arc furnace

&#;Graphite electrode instructions:

1. Wet graphite electrode should be dried before use.

2. Remove the foam protective cap on the spare graphite electrode hole and check whether the internal thread of the electrode hole is complete.

3. Clean the surface of the spare graphite electrode and the internal thread of the hole with compressed air without oil and water; Avoid cleaning with steel wire or abrasive cloth.

4. Screw the joint carefully into the electrode hole at one end of the spare graphite electrode (it is not recommended to install the joint directly into the removed electrode on the furnace), and do not collide the thread.

5. Screw the electrode spreader (graphite spreader is recommended) into the electrode hole at the other end of the spare electrode.

6. When lifting the electrode, pad the soft material to the bottom of the spare electrode fitting joint end to prevent ground damage to the joint; Use the hook to extend into the sling ring of the spreader and then lift it. The lifting electrode should be stable to prevent the electrode from loosening by the B end or colliding with other fixed devices.

7. Lift the spare electrode to the top of the electrode to be connected, align it with the electrode hole and slowly drop it down; Rotate the spare electrode to make the screw hook and electrode rotate down together; When the end faces of the two electrodes are 10-20mm apart, the exposed part of the end faces of the two electrodes and the joint are cleaned again with compressed air. When the electrode is completely lowered at last, it should not be too fierce, otherwise it will cause damage to the thread of the electrode hole and joint due to violent collision.

8. Twist the spare electrode with a torque wrench until the end faces of the two electrodes are in close contact (the correct joint of the electrode and the joint is less than 0.05mm).

&#;Advantages of graphite electrode compared with copper electrode:

1: The increasing complexity of mold geometry and the diversification of product applications lead to higher and higher requirements for discharge accuracy of spark machine. Graphite electrode has the advantages of easy processing, high discharge machining removal rate and small graphite loss. Therefore, some customers of group-based spark machine give up copper electrode and use graphite electrode.

2: Graphite electrode is easier to process, and the processing speed is significantly faster than copper electrode. For example, using milling process to process graphite, its processing speed is 2 to 3 times faster than other metal processing and does not require additional manual processing, while copper electrode needs manual grinding. Similarly, electrodes can be manufactured faster and more efficiently with a high speed graphite machining center, without dust problems. In these processes, the choice of suitable hardness tools and graphite can reduce tool wear losses and copper rod damage. If the specific comparison of graphite electrode and copper electrode graphite electrode milling time, graphite is 67% faster than copper electrode, in general discharge processing, the processing of graphite electrode is 58% faster than that of copper electrode. In this way, the processing time is greatly reduced, and the manufacturing cost is also reduced.

3: Graphite electrode and traditional copper electrode design is different. Many die factories usually have different reservations for roughing and finishing of copper electrodes, while graphite electrodes use almost the same amount of reservations, which reduces the number of CAD/CAM and machine machining times. For this reason alone, it is enough to greatly improve the accuracy of die cavities.

After the mold factory changes from copper electrode to graphite electrode, it should first be clear how to use graphite material and consider other relevant factors. Today, some of our customers use graphite for electrode discharge machining, which eliminates the need for cavity polishing and chemical polishing while still achieving the desired surface finish. Without increasing the time and polishing process, it is impossible to produce such a work piece with copper electrodes. In addition, graphite is divided into different grades, in a particular application with the appropriate levels of graphite and discharge parameters to achieve the ideal machining results, if the use of graphite electrode spark-machine operators using the same parameters as the copper electrode, then the results will be disappointing. If you want to strictly control the material of the electrode, the graphite electrode can be set in a non-loss state (loss less than 1%) during rough machining, but the copper electrode is not used.

In short, graphite has the following high quality properties that copper cannot match:

1. Processing speed: high-speed milling rough processing is 3 times faster than copper; High speed milling finishing is 5 times faster than copper

2. Good machinability, can achieve complex geometric modeling

3. Light weight, density less than 1/4 copper, electrode easy to clamp

4. The number of single electrodes can be reduced, because it can be bundled into composite electrodes

5. Good thermal stability, no deformation and no processing burr

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