Precision-engineered PTA cladding, laser cladding, and automatic welding systems built for advanced industrial manufacturing.
In modern industrial manufacturing, components are constantly subjected to extreme wear, severe thermal loading, corrosive environments, and physical erosion. Conventional welding technologies often struggle to deliver localized protective coatings without altering the mechanical integrity of the base substrate. This is where WIG (Tungsten Inert Gas / Wolfram-Inertgasschweißen) and PTA (Plasma Transferred Arc) cladding systems represent a critical breakthrough.
Compared to traditional thermal spraying or arc surfacing, WIG and Plasma Transferred Arc surfacing systems provide an exceptionally high metallurgical bond strength with low dilution rates. The ability to precisely control heat input ensures minimal deformation of parent metals. The technology has evolved from standard manual overlays to multi-axis CNC and robotic automated configurations that deposit wear-resistant carbides (like tungsten carbide or cobalt-based Stellite alloys) with extreme precision.
Shanghai Duomu has been a leading manufacturer and exporter of PTA cladding machines and Laser cladding machines for more than ten years with a strong technical background. Our dedication to providing customized engineering solutions allows us to serve critical industrial domains worldwide, ensuring high precision, robust structural stability, and reliable performance.
Read More Company ProfileWe feature an independent R&D team, which develops, produces, and sells plasma cladding machine equipment. Our welding systems are designed to deliver highly stable performance and maintain efficient long-term operation. In addition, the laser cladding equipment sold by the company can effectively support large-scale remanufacturing projects. We have mature technological means to provide complete sets of industrial equipment solutions, customized precisely to our clients' metallurgical specifications.
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At present, the company's products have penetrated into many fields such as aerospace military industry, nuclear power, petrochemical industry, coal mines, metallurgy and forging, agriculture, water conservancy and electric power, etc.
Enhance wear resistance of tillage tools, plowshares, and harvester blades against severe abrasive soil contact.
Superalloy deposition and turbine blade repair with zero defect tolerance and optimized crystalline structure control.
Providing critical overlay protection on drill collars, valves, and downhole tools exposed to corrosive slurry.
Rebuilding rolls, guide plates, and hot extrusion dies to prolong service life in thermal fatigue environments.
Industrial procurement departments in the Americas, Europe, and Asia-Pacific are shifting away from standalone machinery purchases. Today, the focus is on turnkey automated cladding integration. Companies demand WIG/PTA systems that feature intelligent data logging, real-time thermal monitoring, and precise closed-loop powder feeding controls.
Key procurement considerations include:
By leveraging advanced digital manufacturing infrastructure, Shanghai Duomu ensures complete control over the machine building lifecycle. From initial CNC machining of high-purity copper plasma torch components to precision PCB calibration for micro-plasma controllers, our facilities operate on rigorous quality assurance protocols. Our supply chain resilience guarantees that critical parts, custom plasma nozzles, and automated positioners are manufactured and shipped with minimal lead times, ensuring your operation maintains peak throughput.
We can provide customized equipment, automatic laser cladding equipment, automatic plasma cladding equipment, intelligent robot cladding equipment, etc. according to customers' requirements.
Read how industry professionals improve service life and component performance using our advanced systems.
"The PTA Welding Valve Application Guide is not just a process choice for valve manufacturers facing high wear, high corrosion, and high-temperature erosion working conditions, but also a key path to improving product competitiveness. As industries such as petrochemical scale up, these systems are critical."
"In industries such as mining, cement, power generation, steelmaking, chemical processing, and biomass energy, screw conveyors are often regarded as auxiliary equipment. However, maintenance data shows that they are among the most frequent causes of unplanned production delays. The automatic cladding machine has resolved this."
"In Plasma Transferred Arc (PTA) hardfacing, achieving a high-quality overlay is not only about selecting the right alloy powder or optimizing welding parameters. One of the most critical factors that directly affects overlay performance is the dilution rate. Shanghai Duomu's machines gave us precise control."
"In industries such as Oil & Gas, Mining, Power Generation, Cement, and Heavy Equipment Manufacturing, hardfacing is no longer just a repair process. It has become a critical technology directly related to equipment lifespan, downtime costs, maintenance frequency, and process throughput."
"In industries such as oil & gas, petrochemical, power generation, mining, and marine engineering, industrial valves are constantly exposed to severe operating conditions including: High pressure, Extreme temperatures, Corrosive media, Abrasive wear, and Sand erosion. The automated cladding system handles it all."
"The PTA Welding Valve Application Guide is not just a process choice for valve manufacturers facing high wear, high corrosion, and high-temperature erosion working conditions, but also a key path to improving product competitiveness."
Find authoritative engineering answers regarding our customization capabilities, technologies, and applications.
While both methods utilize a non-consumable tungsten electrode and an inert shielding gas (usually Argon), WIG cladding uses a free arc that is relatively wide and less focused. PTA (Plasma Transferred Arc) cladding constricts the arc through a specialized copper nozzle orifice, forming a highly collimated plasma beam. This constriction produces a much higher energy density, narrower heat-affected zone (HAZ), higher travel speeds, and lower dilution rates, making PTA the preferred choice for applying thick, wear-resistant coatings with alloy powders.
The dilution rate refers to the percentage of the base metal that melts and mixes into the deposited cladding alloy layer. In severe operating conditions (such as high-temperature gas pipelines or abrasive mining screws), high dilution deteriorates the properties of the wear-resistant overlay by introducing too much substrate iron (Fe). Keeping dilution under 5%—which is standard with Shanghai Duomu’s automatic PTA cladding systems—ensures the cladding retains its maximum hardness, corrosion resistance, and carbide distribution.
Yes. Shanghai Duomu specializes in designing and manufacturing smart robotic surfacing systems. Our automatic cladding machines can be integrated with 6-axis articulated robot arms (such as our DH1440-B06 model) utilizing standardized fieldbus communication protocols. This integration enables precise path programming for complex geometries, including turbine impellers, industrial valves, and intricate screw bricks.
Our PTA surfacing equipment is designed to process a wide variety of alloy powders, including nickel-based alloys, cobalt-based alloys (e.g., Stellite 6, 12, 21), iron-based self-fluxing alloys, and composite powders containing tungsten carbide particles (WC-Co/Ni). The gas flow rate and feed speed can be finely adjusted to prevent tungsten carbide dissolution during the high-temperature plasma process.
Explore our specialized torches, robot systems, calibrators, and portable cladding configurations.
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