Duaplate® D80

The D80 overlay material is a complex chromium carbide weld overlay that is based on AS2576-2455. The microstructure of this material consists of primary M7C3 carbides in a complex carbide austenite matrix. The toughness of the material is improved by the formation of nodular complex carbides leading to a reduction in the size of acicular M7C3 type carbides and inter-carbide spacing.

Duaplate® is manufactured by welding an abrasion resistant material to a mild steel base. A chromium rich powder is fused to the base plate, creating a bi-metallic material with high abrasion resistance whilst still retaining ductility allowing forming and welding. Multiple overlay and backing plate thickness options are available.

Extra alloying elements help to give Duaplate® D80 its superior properties. Typical chemical composition is given below:

A D80 microstructure consists of fine, primary M7C3 carbides surrounded by a eutectic mixture of carbides and austenitic matrix material. The very hard primary carbides form as hexagonal nodules and help to prevent wear of the hardfacing material whilst providing superior impact resistance than Duaplate D60. The austenitic matrix material provides mechanical support to the primary carbides whilst also helping to absorb impact.