Wear performance of Fe-based alloy coating on the 40Cr steel treated by laser cladding

In order to investigate the tribological performance of laser clad coating about die steel, laser cladding techniques were adopted with Fe alloy powders. Tests were carried out using laser clad layers as upper samples and GCr15 steel as lower samples with HT500 abrasion tester. The results were compared with 40Cr's.The morphologies of wear scars were observed with optical microscopy. The tests show that the friction coefficient of 40Cr is bigger than the clad coating's with the load less than 250 g .The friction coefficient reduces with load increasing when the load is less than 300 g. The 40Cr's friction coefficient is (0.563～0.589) and increases with time when the load is 300 g. The friction coefficient of laser is (0.431～0.457) and clad layer decreases under the same condition. The