D-60 DP-60 Welding Overlay Wear Resistant Steel Plates HRC 58-62

What is a weld overlay wear-resistant plate?

It consists of two parts:

Base layer (substrate): Typically made of low-carbon steel or low-alloy high-strength steel (such as Q235B, Q345B, or even NM400). It provides excellent toughness, impact resistance, and ductility, bearing the overall structural strength and ensuring good welding and forming capabilities.

Wear-resistant layer (coating): Multiple layers of high-hardness, high-alloy wear-resistant welding wire/strip are welded onto the base layer using automatic submerged arc welding or open arc welding processes. The wear-resistant layer thickness is typically 3-20mm, and the hardness can reach HRC 55-65 (approximately HBW 600-750), far exceeding that of a solid quenched steel plate.

A simple analogy: It's like thickly coating a tough "bread" (base layer) with an extremely hard "icing" (wear-resistant layer).

Selection and Usage Considerations

Key Selection Points:

Impact Assessment: For high impact, choose a base layer with good toughness (e.g., Q345) and an impact-resistant wear layer (e.g., martensitic type).

Wear Assessment: For extremely severe wear without significant impact, choose a high-hardness wear layer (e.g., D65, chromium carbide type).

Operating Conditions: For high-temperature applications, choose a high-chromium alloy type; for corrosion applications, consider a stainless steel base.

Processing Restrictions:

Cold forming (bending, rolling) is strictly prohibited.

Cutting: Plasma or waterjet cutting is preferred. Flame cutting will alter the properties of the wear layer.

Welding: Welding is only permitted on the base layer to connect other structural components. Direct welding on the wear layer is absolutely prohibited. Heat input must be controlled during welding to prevent peeling of the wear layer.

Installation Design:

Bolt connections (with holes drilled in the base layer) or plug welding are commonly used.

The design should consider ease of replacement and incorporate modular backing plates.