Explore our premium selection of plasma and laser-based surface modification equipment, engineered for high wear resistance and zero distortion.
Laser hardening has emerged as a disruptive technology in global metallurgy, displacing legacy thermal treatments like induction hardening, carburizing, and flame hardening. By using high-power diode or fiber lasers, this method delivers localized, controlled heat input to precise areas of steel and cast-iron components.
The fundamental advantage lies in the thermodynamics of the process: laser energy heats the skin layer of the component above its austenitizing temperature within milliseconds. Once the laser beam passes, the cold mass of the base material acts as an instant heat sink, inducing self-quenching at cooling rates exceeding 1000°C/sec. This results in an ultra-fine martensitic microstructure that boasts significantly higher hardness and wear resistance without the micro-cracking common in traditional bath-quenched materials.
Understanding the structural differences between surface modification methodologies is critical for engineering procurement managers. Below is an analytical overview of the primary operational profiles.
| Process Type | Thermal Input Depth | Dilution Rate | Typical Applications | Primary Advantages |
|---|---|---|---|---|
| Laser Hardening | 0.5 mm – 2.0 mm | 0% (No additive alloy) | Gear teeth, cam tracks, cutting edges, die molds | No distortion, no coolant required, selective scanning |
| Laser Cladding | Metallurgical Bond | < 5% | Hydraulic cylinders, turbine blades, pump shafts | Minimal dilution, high precision, low heat affected zone (HAZ) |
| PTA (Plasma Transferred Arc) | Deep Metallurgical Bond | 5% – 15% | Mining screw conveyors, extruder screws, heavy valves | Extremely high deposition rate, thick carbide overlays |
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.
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.
Get In TouchIn the wake of supply chain reorganizations, OEMs demand customizable, robust, and highly repeatable thermal systems.
Modern supply chains require modular architectures. Our machinery scales from standalone workcells to fully integrated assembly line configurations that interface directly with MES (Manufacturing Execution Systems).
Our proprietary plasma and laser sources maintain constant power delivery profiles over 24/7 continuous duty cycles, dramatically reducing costly downtime in high-throughput environments.
From tool steels to ductile irons, our software interface features parameter profiles tailored for diverse substrates, ensuring flawless, crack-free surface modifications.
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.
Our hardfacing systems dramatically prolong the lifecycle of tillage tools, plowshares, and seed boot tips operating in abrasive environments.
Precision thermal processing ensures microstructural integrity and fatigue resistance for turbine components and aerospace structural elements.
Protective overlays on drill stems, valves, and downhole components prevent failure from abrasive sands and corrosive media.
Restores wear-damaged hot forging dies, roll necks, and continuous casting rollers to improve yield and limit unscheduled maintenance.
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.
Designed for high-precision, low-dilution additive manufacturing of critical shaft components and turbine geometries.
Multi-axis industrial robots integrated with real-time sensory loops for complex 3D surface scanning and trajectory calculations.
The optimal choice for thick protective barriers on heavy mining picks, valves, and agricultural components.
Real-world studies illustrating how industrial manufacturers optimize service life and performance metrics using Shanghai Duomu 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 demand higher safety margins, these tools are paramount."
"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. Laser hardening and PTA cladding resolve this failure mode entirely."
"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 has enabled us to restrict dilution below target limits."
"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 component structural safety under load."
"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. Duomu systems mitigate these threats."
"Integrating automated robotics with PTA technology allows our manufacturing line to handle high variations of part geometry with minimal setup time. The software's parametric interface has saved us hours of operator reprogramming, increasing overall line efficiency by more than 35%."
Read answers to the most common technical questions asked by global procurement and production engineers.
Generally, laser hardening achieved on carbon and low-alloy steels yields a case depth ranging from 0.5 mm to 2.5 mm. The specific depth is determined by the material's thermal conductivity, the laser output power, the spot size, and the scanning velocity. Because it relies on self-quenching, materials require a minimum carbon content of 0.3% to transform fully into martensite.
Dilution control is maintained via precise PLC parameter controls regulating the arc voltage, powder feed rate, and torch movement speed. Our proprietary PTA torches are optimized for thermal distribution, keeping dilution between 5% and 15%, which preserves the mechanical and chemical properties of the deposited alloy powder without over-penetrating the base material.
Laser hardening processes components with a fraction of the heat input of induction systems. The local focus prevents bulk heating, meaning zero or negligible geometric distortion. Post-process grinding operations are frequently eliminated entirely, yielding immediate cost savings. Moreover, laser systems can easily target tight spaces like inner radius fillet zones.
Yes, using our robotic systems and mobile laser devices, high-volume molds, cast steel dies, and heavy industrial machinery can be treated directly at the production facility. This saves transport logistics and reduces machine dismantling overhead.
Examine our precision positioning mechanisms, automated multi-axis gantry robots, and specialized heavy-duty wear-facing systems.
For inquiries about our products, proprietary cladding systems, or customizable machinery pricing, please leave us a message and our specialists will respond within 24 hours.
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