RPIC wear resistant steel plates are manufactured by welding one or multiple abrasion resistant layers on a medium or low carbon steel base plate. The overlay alloy has a high amount of chromium carbide hard particles. These particles are distributed evenly throughout the layer, creating a strong microstructure. The hardness is HRC 58——65 and depends on the overlay's thickness.

The main ingredients of RPIC plate are C (%): 3.0——5.0 and Cr (%): 18——40. This chemical proportion results in a large amount of Cr7C3 chrome carbide hard particles. The micro-hardness (up to HV1800) of these particles thoughout the layer will guarantee a super wear resistant surface.

The overlay and base plate are metallurgical bonding. The overlay will penetrate into base plate about 0.8——1.8 mm, reaching up to 350 Mpa in our tests.

In the picture there are many cracks, please don't worry. The wear resistant steel plate is not broken and the cracks are good to release the thermal stress. RPIC wear plate is composed of many welding beads and the overlay contains a series of evenly spaced hairlike cracks (The cracks are distributed throughout the overlay thickness, but end up on the base plate's surface). These transversely distributed cracks relief the structure's tension improving wear resistant steel plate's performance like mechanical properties and the overlay don't fall off the base metal.

How to Judge Hardfacing Chromium Carbide Overlay Plate?

When we’re talking about hardfacing CCO plates, you need to take note of a couple of factors.

* Chemical component of the CCO plate

* Hardness of the CCO plate

* Wear resistance properties

* Life expectancy

These are the most important factors you can judge and choose from.

Why our wear plate has such good wear resistance?

1. The overlay chemical composition is the key.

The main ingredients of RPIC plates are C(%) :3.0-5.0 and Cr(%):25-40.

This chemical proportion results in a large amount of Cr7C3 chrome carbide hard particles. The micro-hardness (up to HV1800) of these particles throughout the layer will guarantee a super wear resistant surface.

Performance Test:

Test equipment: Quartz sand rubber wheel abrasion test machine.

Conditions: 

1. Choosing same dimension specimens for different materials and wear plate producers, and put them under the same wearing working conditions in our testing equipment.

2. 45 minutes for each specimen

2. Chromium carbide microstructure

The wear resistance of wear plate depends mostly on the hardness, shape, size, amount and distribution of the chromium carbide hard particles.

As you can check on the picture, the carbide (Cr7C3) volume fraction on the microstructure is above 50%.

3. Bonding strength between the overlay and base plate.

The overlay and base plate is very well bonding. The overlay will penetrate into base plate about 0.8mm-1.8mm, reaching up to 350Mpa in our tests.