激光熔敷Ni+WC+RE合金层的高温性能研究

Performance of Laser Cladding Alloy Layer at High Temperature

通过不同成分、不同温度下的高温硬度、高温干摩擦磨损试验,对激光熔敷合金层的一些高温性能进行了研究。结果表明,在相同实验条件下,不同成分熔敷层的高温硬度和高温耐磨性均随温度升高而下降,其中Ni21+20%WC+0.5%CeO2熔敷层的高温性能最好。激光熔敷层的高温磨损机制以粘着磨损为主,兼有磨粒磨损和氧化磨损。

The hardness and abrasivewear behavior of the laser cladding alloy layer at high temperature was investigated by changing composition and temperature . The results showed that the hardness and abrasivewear behavior decreased with increasing of temperature. Ni21+20%WC+0.5%CeO2 cladding layer presents the best performance at high temperature. The main abrasivewear mechanism of the laser cladding alloy layer at high temperature was adhesive abrasion along with grain abrasion and oxide abrasion.