CE Certified Factory Automatic Welding Table Tools D28 3D/2D Nitrided Steel is a D28 series 3D/2D welding table (different from the smaller D16 series), primarily designed for heavy-duty metal processing. It is suitable for automated welding, workpiece positioning, and assembly in fields such as automotive manufacturing, construction machinery, and aerospace, improving welding accuracy and production efficiency.

1. Substrate and Pre-treatment
The main substrate material is Q355 low-alloy high-strength steel (some heavy-duty models use HT300 cast iron). After procurement, it undergoes overall annealing treatment (temperature approximately 800–850℃, followed by slow cooling after holding at temperature) to completely eliminate internal stresses from forging/rolling and prevent subsequent deformation;
Before processing, the substrate must undergo ultrasonic flaw detection to ensure there are no internal cracks, pores, or other defects.

2. Surface Plasma Nitriding Process
Process flow: The workpiece is placed in a nitriding furnace, and in a vacuum environment of 350–560℃, nitrogen/ammonia gas is introduced to allow nitrogen atoms to penetrate the steel surface, forming a 0.1–0.3mm thick nitrided layer;
Process advantages:
Hardness is increased to 450–850 Vickers (2–3 times that of ordinary steel), significantly enhancing resistance to welding slag abrasion;
The nitrided layer has high density, and the salt spray test can reach more than 500 hours (far exceeding the rust prevention capabilities of ordinary paint/galvanizing);
Excellent high-temperature resistance, the high temperature conducted by the workpiece during welding (≤480℃) will not cause surface oxidation or softening.

Automotive Manufacturing: Used for welding and positioning of automotive chassis subframes; multiple units can be combined to position multiple workpieces simultaneously, suitable for assembly line production;

Construction Machinery: Used for the assembly of excavator arms and crane structural components; the heavy-duty version (with a load capacity of 10 tons) can handle large workpieces;

Aerospace: Used for precision welding of satellite brackets and aircraft components; the positioning accuracy (±0.05mm) meets high-precision requirements;

Pressure Vessels: Used for welding of storage tanks and pipelines; the corrosion-resistant tabletop is suitable for the acidic and alkaline environments of the chemical industry.

CE Certification: Complies with the European Union EN ISO 12100 mechanical safety standard, ensuring personnel safety during equipment operation;

ISO 9001 Certification: Production process follows a quality management system; each welding table undergoes flatness testing, hole position tolerance testing, and load-bearing testing before leaving the factory, and a test report is provided;

After-sales service: Mainstream manufacturers provide a 1-year warranty, and the nitrided layer is covered by a 2-year warranty against non-human damage. Lifetime support for fixture accessories is also provided.

Precision Engineering, Empowering with Accuracy.
As a professional manufacturer of D28 series 3D/2D nitrided steel welding tables, we are deeply rooted in the industrial welding tooling field. With CE certification as our quality foundation and plasma nitriding technology as our core advantage, we create automated welding solutions that combine high precision and high durability.
From efficient production lines in automotive manufacturing to precision assembly in aerospace, we consistently adapt to diverse needs with modular design and safeguard every welding process with rigorous quality control.
We look forward to partnering with you, using our expert tooling to support industrial upgrading and jointly create a high-quality future for the welding industry!