To be a valuable global supplier
for metallic honeycombs and turbine parts
DOC metal substrate have become essential components in modern exhaust aftertreatment systems. These specialized structures serve as the foundation for catalytic coatings in diesel emission control, enabling efficient conversion of harmful pollutants. The unique properties of DOC metal substrate technology make it particularly suitable for high-temperature applications in heavy-duty vehicles and industrial equipment.
Material Composition
The DOC metal substrate typically consists of high-grade ferritic stainless steel containing 18-22% chromium and 4-6% aluminum. This alloy composition provides exceptional oxidation resistance at temperatures up to 950°C. The metallic core of the DOC metal substrate is often formed into intricate honeycomb structures with cell densities ranging from 400-600 cells per square inch. A critical feature of advanced DOC metal substrate designs is the thermally grown alumina layer that forms on the surface during heat treatment, creating an ideal bonding surface for catalytic coatings.
Manufacturing Process Requirements
Production of DOC metal substrate components demands precise process control at every stage. The manufacturing begins with ultra-thin foil rolling, where thickness tolerances must be maintained within ±5 microns. Laser welding technology joins the foil layers with micron-level precision, creating the characteristic honeycomb structure of the DOC metal substrate . Post-weld heat treatment develops the essential alumina scale while relieving mechanical stresses. The final DOC metal substrate undergoes rigorous quality checks, including flow distribution tests and thermal cycling validation.
Performance Standards
Quality DOC metal substrate products must meet several critical performance criteria:
1. Thermal shock resistance exceeding 100 cycles between 950°C and room temperature
2. Vibration durability maintaining structural integrity under 50G acceleration
3. Pressure drop characteristics below 2.5 kPa at standard flow conditions
4. Coating adhesion strength surpassing 1.5 MPa after thermal aging
As emission regulations become increasingly stringent worldwide, the importance of high-performance DOC metal substrate technology continues to grow. The combination of advanced metallic alloys, precision manufacturing processes, and rigorous quality standards ensures that modern DOC metal substrate products can meet the demanding requirements of next-generation diesel aftertreatment systems.