Duroxite® 101
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General Product Description
Duroxite® 101 is manufactured by depositing a chromium-rich carbide overlay on Hardox 450 backing plate. The hardfacing overlay is suitable for severe abrasive wear and impact applications. With its optimum carbide concentration, consistently good wear resistance from top surface through 75% depth of overlay, and Hardox backing plate, Duroxite® 101 provides a better combination of wear and impact resistance compared to the traditional mild steel backing overlay plate.
Key Benefits
- Designed to better withstand plastic deformation due to its high yield strength flexing back after impact
- Stronger support due to high hardness of Hardox and better bonding between overlay and base steel
- When overlay wears off Hardox® 450 backing plate will wear at a lower rate than mild steel providing a greater safety margin
- Better performance for impact situations than Duroxite® 100 at elevated temperatures up to 350° C (660° F), but impact resistance is best at room temperature
Typical Applications
Duroxite® 101 is widely used in the mining, cement and power generation industries. Some specific applications include:
For more information on applications see the Duroxite® Product brochure.
Dimension Range
Other plate sizes and custom thicknesses can be produced upon request.
Standard plate sizes
Other plate sizes and custom thicknesses can be produced upon request.
Mechanical Properties
1) Surface hardness is measured on machined flat surface just below overlay surface.
2) ASTM G65 - Procedure A weight loss, is a standard test measuring sliding abrasion resistance using a dry sand/rubber wheel apparatus. ASTM G65-Procedure A is the most severe test method.
3) ASTM G65 - Procedure A weight loss, wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from the top surface through to the depth of 75% of the overlay.
Microstructure
The typical overlay microstructure of Duroxite® 101 is composed of a high proportion of extremely hard primary M7C3 chromium-rich carbides with a typical hardness of 1700 HK4) dispersed evenly in a ductile eutectic austenite matrix. The volume fraction of primary carbides is maintained between 30 to 50 % to provide a good combination of wear resistance and homogenous bonding.
4) HK is the Knoop microhardness which is primarily used for very brittle materials.
Tolerances
Thickness
Overall and overlay thickness tolerances can be guaranteed within ±10% of specified thickness.
Flatness
Plate flatness tolerance can be guaranteed within ±3 mm (±1/8”) over 1.5 m (5’) plate length for plate dimensions equal to or less than 1.5 m (5’) x 3.0 m (10’). For plates greater than 1.5 m (5’) wide by 3.0 m (10’) long, the following flatness guarantees apply.
Delivery Conditions
Duroxite® 101 is normally supplied in an as-welded condition, but can also be supplied in a ground condition upon request.
Fabrication and Other Recommendations
Welding, cutting, forming and machining
Recommendations can be found in the Duroxite® Products brochure, or consult your local technical support representative.
Safety precautions
When welding or cutting Duroxite® products, smoke is produced containing harmful fumes and gases that are chemically highly complex and difficult to easily classify. The major toxic component in the fumes and gases produced in the process is hexavalent chromium. The proper exhaust ventilation equipment and fume-extraction torches are recommended, as well as suitable protective clothing and respiratory protection for operators.