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Chrome Carbide Overlay Plate
Chromium Carbide Overlay(CCO) is chromium carbide composite cladding that is fusion bonded to a backing material, . The overlay material is an austenitic chromium carbide iron deposited by a submerged arc welding or open arc welding process, the microstructure consists of primary Cr7C3 carbides in a carbide austenite eutectic matrix. The high abrasion resistance is provided by the hard chromium carbides that protect the matrix from abrasive wear. The standard backing material for CCO is mild steel, the backing plate acts as a ductile base, which offers good impact resistance & toughness and allows CCO to be formed and shaped without damage to the overlay material.
❶ Hardness: >670HV (60-64HRC)
❷ Smooth surface, crack-free, no welding beads, low friction, excellent for reducing hang up or carry back
❸ Plates are made by one single pass overlay using carbide dispersion distribution technology, uniform microstructure and hardness equally distributed
❹ 2 times wear property than conventional overlay plate based on our experience
❺ Depth of fusion dilution: around 0.5mm, very low overlay dilution with backing plate
❻ Primary carbide volume: >37%
❼ Flatness: ±2.5mm per 1.5 linear meters
❽ Operating temperature < 600℃
❾ Plates can cut into other sizes/shapes upon request. studs, holes can be added or machined
The base material can be welded with standard mild steel or low hydrogen welding consumables with no pre-heating required. However, care should be taken to avoid contacting the overlay material.
Plasma cutting is the recommended method for cutting CCO plate. It is preferable to cut CCO from the backing plate side to ensure a clean edge and to prevent carbide contamination.
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