Deploying high-integrity overlay systems engineered for precision surfacing, PTAW hardfacing, and robotic automation.
Shanghai Duomu has been a leading manufacturer and exporter of PTA cladding machine and Laser cladding machine for more than ten years with a strong technical background. Our dedication to design and hardware integration allows us to build heavy-duty industrial units that withstand severe service requirements across key metallurgical fields.
By offering end-to-end service, from conceptualizing specialized weld paths to manufacturing robust powder feeders and multi-axis manipulators, we ensure our clients leverage the optimal metallurgical bond on high-wear surfaces.
I have an independent R&D team, which develops, produces and sells plasma cladding machine equipment. The welding machine has stable performance and can 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.
Our focus extends to resolving critical thermal input challenges. By optimizing the dilution zone to levels under 5%, we guarantee the mechanical properties of target cladding materials—whether stellite, carbide matrices, or superalloys—are fully preserved without core distortion.
Surface degradation due to erosion, high-stress abrasion, and severe chemical attack remains one of the costliest problems in heavy machinery sectors. Historically, traditional surface thermal spray processes or standard arc welding techniques like MIG/TIG suffered from high dilution rates or mechanical bonding limits. "Paw Welding"—technically defined in the advanced cladding sector as high-precision Plasma Transferred Arc Welding (PTAW) coupled with multi-axis automated control—has redefined surface repair parameters.
Dilution is the mixing of the alloy deposit with the parent metal, significantly impacting the hardness, corrosion resistance, and ductility of the protective overlay. In conventional gas metal arc welding (GMAW), dilution values often exceed 15% to 25%, meaning multiple overlay layers must be deposited to attain the target chemical properties. In contrast, our automated plasma cladding equipment confines dilution to less than 5% in a single pass. The highly focused plasma arc column minimizes the heat-affected zone (HAZ), preventing metallurgical deformation in thin-walled or complex structures like high-pressure hydraulic cylinders and gas turbine blades.
As an authoritative manufacturer, we design both PTAW and Laser Cladding machines. Choosing between these systems depends on thickness, bead width, and capital budget constraints:
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.
In modern industrial manufacturing, sourcing capital equipment requires absolute operational predictability. Shanghai Duomu supports high-capacity remanufacturing factories across the Americas, the European Union, Australia, and Southeast Asia. We construct our systems to comply with international electrical safety standards (such as CE, UL) and integrate processes adhering strictly to AWS (American Welding Society) and ASME regulations for protective cladding.
Beyond shipping, we provide localized remote diagnostics and dispatch specialist teams for installation and calibration. We understand that unplanned downtime in a mine or petrochemical plant can incur massive daily costs. Thus, our systems feature modular configurations so critical components like the powder feed assemblies or plasma torches can be replaced or serviced without disrupting production.
Full CE and ISO 9001:2015 certification alignment. Systems meet strict AWS D14.1/D14.1M guidelines for heavy equipment cladding.
Control systems are fully ready to interface with Siemens, Fanuc, or Kuka robotic platforms, enabling automated operation on complex curves.
Equipped with Ethernet/IP interfaces, our engineers can remotely check powder feeding flow rates and arc stability parameters globally.
We can provide customized equipment, automatic laser cladding equipment, automatic plasma cladding equipment, intelligent robot cladding equipment, etc. according to customers' requirements, including special equipment in the industry, such as hydraulic rod cladding machine, pick cladding machine, valve cladding machine, etc.
The manufacturing paradigm is shifting from operator-dependent configuration to closed-loop, data-driven automated controls. Over the next five years, Shanghai Duomu is concentrating on three primary technology vectors to deliver unparalleled performance:
By integrating thermal imaging cameras and pyrometers with the laser and plasma control units, our systems will adaptively modulate travel speed and current in real time. If the base metal starts overheating and threatens to elevate dilution rates, the power source will automatically compensate, maintaining uniform metallurgical chemistry.
Precision hardfacing relies on steady, pulsation-free powder feeding. Our future lines will feature gravimetric powder feeder modules that dynamically measure weight change, automatically adjusting carrier gas flow to ensure zero fluctuations, even when depositing complex spherical metallic alloys or MMC (Metal Matrix Composites).
Review the latest performance notes, metallurgy assessments, and engineering reports detailing real-world application benchmarks.
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, power generation, and oil and gas refine parameters, PTA hardfacing guarantees stellite deposits remain pure and highly functional.
Valve Processing Department
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 downtime. Depositing a highly wear-resistant chromium carbide or tungsten carbide protective layer via plasma surfacing cuts these interventions dramatically.
Bulk Handling Division
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. Whether you are using cobalt-based or iron-based alloys, restricting dilution keeps original properties intact.
Metallurgical Analysis R&D
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 optimization of operational assets.
Infrastructure Protection Lead
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. Using PTAW overlays ensures long term compliance and sealing safety.
Flow Control Systems Specialist
Direct answers to the most common engineering and procurement questions about plasma transfer arc welding and laser cladding integration.
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Submit Technical InquiryHeavy duty torches, CNC feeders, and specialized system components designed to operate under harsh, high temperature, continuous production routines.
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