Sg100-720 Plasma Spray Electrode Compatible with Praxiar's

• Customization: Available
• Type: Alloy Electrode
• Cooling System: Nature Cooling
• Model NO.: WLN-SG100
• Function: Plasma Generated Body
• Materials: Copper and Tungsten
• Apply in: Aerospace, Automobile Thermal Spraying Industry
• Making Method: Back-Casting
• Nozzle Classify: Pure Copper and Copper with Tungsten Insert
• Style: Standard
• Certificate: ISO, RoHS
• Attribution: Wear and Corrosion Resistance
• Transport Package: Carton
• Specification: 39*21*29cm
• Trademark: WL
• Origin: China
• Production Capacity: 20000PCS/Per Month
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 1.000kg

Product Description

Plasma spray nozzle and electrode of Weilai new materials are your best choice!
·Top quality tungsten electrode with excellent arcing performance and lifespan.
·The seamless combination of tungsten and copper ensures the stable operation of your process.
·A comprehensive product series widely applicable to spray guns such as F4, F1, 9M, 6M, 3M, SG-100 etc.
 

The Critical Role and Characteristics of the SG100-720 Electrode in Plasma Spray Torches

In the thermal spray industry, the SG-100 is a legendary, highly efficient plasma spray gun widely utilized by aerospace, automotive, and heavy machinery MRO (Maintenance, Repair, and Overhaul) facilities worldwide. Within this system, the SG100-720 electrode (Electrode 720) stands as the absolute "heart" of the torch.

 

I. The Critical Role of the SG100-720 Electrode

1. The Birthplace of the Plasma Arc

The SG100-720 electrode serves as the core of the torch's cathode assembly. During operation, a high-voltage electrical arc is struck and maintained between the tip of this electrode and the inner wall of the nozzle (anode). Without its ability to sustain a continuous, intense arc, working gases (such as Argon, Hydrogen, or Helium) cannot be ionized into a high-temperature plasma plume exceeding 10,000°C.

2. The Anchor for Coating Quality and Uniformity

Any micro-fluctuation in voltage or drifting of the arc position on the electrode tip instantly alters the temperature and velocity of the plasma flame. This leads to uneven melting of the injected powders (such as ceramics or metals), causing porosity, unmelted particles, or delamination on the substrate. The geometrical accuracy of the SG100-720 directly dictates the quality of aerospace-grade coatings like Thermal Barrier Coatings (TBCs).

3. The Bottleneck of Workshop Downtime (TAT)

When coating massive industrial components (such as gas turbine rotors or heavy-duty bearing journals), unexpected mid-process shutdowns to replace eroded hardware are extremely costly. The erosion rate of the cathode is typically the primary bottleneck determining torch lifespan. The durability of the SG100-720 directly controls whether a workshop can run a full, uninterrupted shift or face constant calibration downtime.

 

II. Core Characteristics of the SG100-720 Electrode

Engineered to endure extreme current loads and thermal stress, a premium-grade SG100-720 electrode delivers four hard-core technical characteristics:

1. Seamless Copper-Inlaid Tungsten Technology

This is the pinnacle of its manufacturing quality:

• Tungsten Insert: The electron-emitting tip utilizes high-density tungsten with an extreme melting point (3,410°C), typically doped with rare-earth elements (such as Lanthanum or Thorium) to lower the work function.
• Oxygen-Free Copper Body: The outer shell is made of premium OFC. Through a proprietary, seamless diffusion bonding process, the tungsten and copper are perfectly fused.
• The Advantage: It completely eliminates microscopic air gaps at the tungsten-copper interface. This ensures seamless thermal conductivity, allowing the brutal heat generated by the arc to be instantly evacuated, preventing the tungsten core from localized melting.

2. Exceptional Arc Erosion Resistance & Heat Dissipation

The SG-100 gun frequently operates under heavy-duty currents reaching several hundred amperes. The 720 electrode is designed with an optimized internal fluid dynamics cooling channel. This allows high-pressure cooling water to flow at maximum velocity, keeping the core temperature stable and exhibiting elite anti-arc erosion capabilities.

3. Aerospace-Grade Concentricity for Longevity

The spatial stability of the plasma jet relies heavily on the symmetry of the internal gas flow and arc. The SG100-720 features strict CNC geometric tolerances and flawless concentricity. This forces the plasma arc to split and rotate precisely around the center axis, minimizing single-sided eccentric wear and doubling the hardware's actual lifespan running hours.

4. 100% Plug-and-Play OEM Interchangeability

Processed at micron-level precision, this replacement part achieves a 100% exact geometric match with other original torch internals (such as the 175 series nozzles and gas distributors). It serves as a highly cost-effective alternative that seamlessly swaps into existing setups without requiring any adjustments to the original, qualified spray parameters.

 

 

SG-100 plasma thermal spray anode and cathode models

Product model	Product name	Related product model
WLE-SG100-129	SG100 electrode	843083129
WLE-SG100-720	SG100 electrode	841083720
WLN-SG100-730	SG100 nozzle	02083-730
WLN-SG100-145	SG100 nozzle	03083-145
WLN-SG100-165	SG100 nozzle	03083-165
WLN-SG100-175	SG100 nozzle	03083-175

 

 

The technical advantages of our company's copper tungsten electrode for spraying:
Weilai new materials use high-performance tungsten electrodes to ensure good arcing performance and ablation resistance,Realize seamless combination of tungsten and copper. Compared with traditional brazing, the bonding strength between tungsten and copper is high, and the contact area, resistance and heat dissipation are more uniform, which greatly improves the product performance. Therefore, our Thermal spraying electrode has a good service life.





Zhuzhou Weilai New Materials Technology Co., Ltd. is a manufacturing company!

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