Micro Plasma Arc Welding (MPAW) is a high-precision welding method using a contracted plasma arc as the heat source. It belongs to a branch of plasma arc welding (PAW), the working current range is usually 0.1-30 A, the arc is extremely small, so it is called “micro beam”. It is suitable for welding ultra-thin metal materials (0.05-2 mm).
Micro Plasma Arc Welding is a high-precision welding method between TIG and laser welding. Micro Plasma Arc Welding has a smaller heat-affected zone and higher welding accuracy than traditional TIG welding, and has significant advantages in cost and process stability over laser welding.
Principle of Micro Plasma Arc Welding
Micro Plasma Arc Welding using inert gases such as argon in the nozzle by high-frequency arc ionization, the formation of high-temperature plasma flow. Through the contraction of the nozzle, the arc is compressed into a high temperature, high energy density plasma beam, directly on the surface of the workpiece, so that the metal localized melting and the formation of weld.
Micro Plasma Arc Welding provides a more focused arc with greater penetration and a smaller heat affected zone than traditional TIG welding .
Advantages of Micro Plasma Arc Welding
1. Low heat input: avoid welding through ultra-thin plates and reduce deformation.
2. High welding precision: weld seam is beautifully shaped, suitable for parts with strict dimensional requirements.
3. Strong arc stability: even at low current, the welding process can remain stable.
4. Wide range of application: can weld stainless steel, titanium alloy, nickel-based alloy and precious metals.
5. High degree of automation: can be integrated into automated welding production lines.
Micro Plasma Arc Welding Applications
- Aerospace: welding of small diameter fittings, sealing structures, thin-walled parts
- Medical devices: stainless steel catheters, implants, shell welding
- Electronics industry: sensor housings, relay packages, micro-connectors
- Precision instruments: clock parts, vacuum devices, optical components package
How to choose Micro Plasma Arc Welding equipment?
When purchasing Micro Plasma Arc Welding equipment, you should focus on the following points:
- Current adjustment range: whether to meet the precision control of 0.1-30A.
- Control system: support automation and precise parameter setting.
- Cooling system: to ensure the service life of the nozzle and electrode.
- Protective gas: usually use argon, part of the case need to mix helium.
- Brand and after-sales service: choose well-known manufacturers to ensure the stability of the equipment.
Micro Plasma Arc Welding FAQ
Q1: What materials is Micro Plasma Arc Welding suitable for welding?
A: Stainless steel, titanium alloy, nickel-based alloy, molybdenum, gold, silver and other precious metals, as well as a variety of ultra-thin metal materials.
Q2: What is the welding thickness range of Micro Plasma Arc Welding?
A: Usually 0.05-2mm, suitable for thin-walled precision parts.
Q3: What are the advantages of Micro Plasma Arc Welding compared with laser welding?
A: Laser welding is more accurate, but the cost of equipment is large; micro-beam plasma welding is more economical, stable process, suitable for most of the precision welding occasions
Q4: What is the price of Micro Plasma Arc Welding equipment?
A: Depending on the brand and configuration, the price ranges from tens of thousands of dollars to hundreds of thousands of dollars, you need to choose with the specific needs..
Micro Plasma Arc Welding, as a high-precision, low heat input, stable and reliable welding process, is widely used in aerospace, medical equipment, electronics industry, precision manufacturing and other fields. It has irreplaceable advantages in ultra-thin metal welding and is an important welding method in modern high-end manufacturing.
Micro Plasma Arc Welding is certainly an option worth considering if you are looking for a “Precision Welding Solution”. Interested in Micro Plasma Arc Welding? Or to discuss your specific repair needs, Contact Us! Our team of experts is ready to provide customized solutions for your specific application.
Post time: Sep-11-2025